Porous carbon generated from biomass is among the most promising electrode materials for supercapacitor applications. In this research work, sawdust was used as a carbon source to synthesize N-doped hydrochars via the hydrothermal method in the presence of nitrogen-containing compounds including ammonium chloride, urea agar, ammonium molybdate tetrahydrate, and mammalian urine, followed by chemical activation by potassium hydroxide. Using the hydrothermal technique, it was possible to dope 7.06 wt% of nitrogen into the hydrochar. The as synthesized materials were characterized by TGA/DTA, FTIR, BET, XRD, SEM/EDS, XPS, and proximate analysis. Furthermore, EIS, CV, and GCD were used to assess electrochemical performance. All the N-doped hydrochars synthesized samples possess crystalline and mesoporous structures with hydroxyl and amide functional groups. The KOH activation improved the specific surface area and pore volume by 8.5 % and 21 %, respectively. The maximum specific surface area and pore volume were found to be 560.72 m2/g and 0.2246 cc/g, respectively. The CV findings demonstrate the battery-like characteristics of the electrocatalysts made with molybdenum (VI) oxide (MoO3) embedded in these N-doped hydrochars, yielding 35.16 F/g specific capacitance at 10 mV/s. In contrast, the GCD's specific capacitance displays 80 F/g at 0.5 Ag−1.
{"title":"Hydrothermally synthesized nitrogen-doped hydrochar from sawdust biomass for supercapacitor electrodes","authors":"Gedefaw Asmare Tafete , Abdullah Uysal , Nigus Gabbiye Habtu , Metadel Kassahun Abera , Temesgen Atnafu Yemata , Kurabachew Simon Duba , Solen Kinayyigit","doi":"10.1016/j.ijoes.2024.100827","DOIUrl":"10.1016/j.ijoes.2024.100827","url":null,"abstract":"<div><div>Porous carbon generated from biomass is among the most promising electrode materials for supercapacitor applications. In this research work, sawdust was used as a carbon source to synthesize N-doped hydrochars via the hydrothermal method in the presence of nitrogen-containing compounds including ammonium chloride, urea agar, ammonium molybdate tetrahydrate, and mammalian urine, followed by chemical activation by potassium hydroxide. Using the hydrothermal technique, it was possible to dope 7.06 wt% of nitrogen into the hydrochar. The as synthesized materials were characterized by TGA/DTA, FTIR, BET, XRD, SEM/EDS, XPS, and proximate analysis. Furthermore, EIS, CV, and GCD were used to assess electrochemical performance. All the N-doped hydrochars synthesized samples possess crystalline and mesoporous structures with hydroxyl and amide functional groups. The KOH activation improved the specific surface area and pore volume by 8.5 % and 21 %, respectively. The maximum specific surface area and pore volume were found to be 560.72 m<sup>2</sup>/g and 0.2246 cc/g, respectively. The CV findings demonstrate the battery-like characteristics of the electrocatalysts made with molybdenum (VI) oxide (MoO<sub>3</sub>) embedded in these N-doped hydrochars, yielding 35.16 F/g specific capacitance at 10 mV/s. In contrast, the GCD's specific capacitance displays 80 F/g at 0.5 Ag<sup>−1</sup>.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100827"},"PeriodicalIF":1.3,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-09DOI: 10.1016/j.ijoes.2024.100825
Lamya Kadiri , Mouhsine Galai , Abdelkarim Ouass , Youness Essaadaoui , Mohamed Khattabi , Savaş Kaya , Nadia Arrousse , Omar El Khattabi , Mohammed Cherkaoui , El Housseine Rifi , Ahmed Lebkiri , Mohammad K. Al-Sadoon , Basheer M. Al-Maswari
This research investigated the performance of coriander seeds, for the first time, in two critical phenomena: wastewater treatment and corrosion inhibition in acidic environments. On one hand, the aqueous extracts from Coriandrum sativum seeds (CE) were evaluated for mild steel corrosion inhibition in a 2.0 M phosphoric acid medium using several techniques such as phytochemical analysis (GC-MS), potentiodynamic polarization, electrochemical impedance spectroscopy, scanning electron microscopy (SEM-EDAX) and theoretical analyses, including DFT calculations and Molecular Dynamic Simulations, further elucidated the major chemical components. First, the phytochemical analysis has proved that CE contains heteroatoms. Second, the electrochemical results indicate that CE behaves as a mixed type inhibitor and the corrosion reaction is controlled by charge transfer process. Finally, The theoretical calculations confirmed that the active compounds of CE can be adsorbed on the Fe (1 1 0) surface through physical patterns and by sharing charges with iron to form coordinate bonds. The acquired results have shown a strong correlation between corrosion inhibition efficiency that was about 93 %, SEM-EDAX and DFT parameters. On the other hand, the study examined coriander seeds (CS) in powder form as a removal of copper ions in aqueous solutions through Atomic Absorption Spectroscopy and Inductively Coupled Plasma analysis. The parametric study was effectuated by establishing the effect of contact time, adsorbent mass, solution pH and stirring speed. The removal rate was about 79 %. Regeneration studies showed that CS could be reused for five cycles without significant loss of effectiveness. SEM-EDAX analysis has proved the studied process.
这项研究首次调查了芫荽籽在两种关键现象中的性能：废水处理和酸性环境中的缓蚀作用。一方面，利用植物化学分析（GC-MS）、电位极化、电化学阻抗光谱、扫描电子显微镜（SEM-EDAX）等多种技术，评估了芫荽籽水提取物（CE）在 2.0 M 磷酸介质中对低碳钢的缓蚀作用，并通过 DFT 计算和分子动力学模拟等理论分析，进一步阐明了其中的主要化学成分。首先，植物化学分析证明 CE 含有杂原子。其次，电化学结果表明 CE 是一种混合型抑制剂，腐蚀反应受电荷转移过程控制。最后，理论计算证实，CE 的活性化合物可以通过物理方式吸附在铁（1 1 0）表面，并与铁共享电荷形成配位键。获得的结果表明，约 93% 的缓蚀效率、SEM-EDAX 和 DFT 参数之间存在很强的相关性。另一方面，该研究通过原子吸收光谱和电感耦合等离子体分析，研究了粉末状的芫荽籽（CS）在水溶液中去除铜离子的作用。参数研究通过确定接触时间、吸附剂质量、溶液 pH 值和搅拌速度的影响来实现。去除率约为 79%。再生研究表明，CS 可重复使用五个周期而不会明显降低效果。SEM-EDAX 分析证明了所研究的过程。
{"title":"Exploring the performance of Coriandrum sativum extract as an effective corrosion inhibitor for mild steel in a 2.0MH3PO4 medium, and its sustainable application in the eco-friendly removal of heavy metals","authors":"Lamya Kadiri , Mouhsine Galai , Abdelkarim Ouass , Youness Essaadaoui , Mohamed Khattabi , Savaş Kaya , Nadia Arrousse , Omar El Khattabi , Mohammed Cherkaoui , El Housseine Rifi , Ahmed Lebkiri , Mohammad K. Al-Sadoon , Basheer M. Al-Maswari","doi":"10.1016/j.ijoes.2024.100825","DOIUrl":"10.1016/j.ijoes.2024.100825","url":null,"abstract":"<div><div>This research investigated the performance of coriander seeds, for the first time, in two critical phenomena: wastewater treatment and corrosion inhibition in acidic environments. On one hand, the aqueous extracts from Coriandrum sativum seeds (CE) were evaluated for mild steel corrosion inhibition in a 2.0 M phosphoric acid medium using several techniques such as phytochemical analysis (GC-MS), potentiodynamic polarization, electrochemical impedance spectroscopy, scanning electron microscopy (SEM-EDAX) and theoretical analyses, including DFT calculations and Molecular Dynamic Simulations, further elucidated the major chemical components. First, the phytochemical analysis has proved that CE contains heteroatoms. Second, the electrochemical results indicate that CE behaves as a mixed type inhibitor and the corrosion reaction is controlled by charge transfer process. Finally, The theoretical calculations confirmed that the active compounds of CE can be adsorbed on the Fe (1 1 0) surface through physical patterns and by sharing charges with iron to form coordinate bonds. The acquired results have shown a strong correlation between corrosion inhibition efficiency that was about 93 %, SEM-EDAX and DFT parameters. On the other hand, the study examined coriander seeds (CS) in powder form as a removal of copper ions in aqueous solutions through Atomic Absorption Spectroscopy and Inductively Coupled Plasma analysis. The parametric study was effectuated by establishing the effect of contact time, adsorbent mass, solution pH and stirring speed. The removal rate was about 79 %. Regeneration studies showed that CS could be reused for five cycles without significant loss of effectiveness. SEM-EDAX analysis has proved the studied process.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100825"},"PeriodicalIF":1.3,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-09DOI: 10.1016/j.ijoes.2024.100829
Kexuan Wang , Gaohan Cao , Yi Cai , Xingbiao Zhou , Chen Xu , Xuyong Zheng , Binbin Zhang
The microstructure of Ti-Mo-Zr alloy fabricated by selective laser melting (SLM) was studied and its corrosion behavior was investigated by a series of electrochemical methods. The results showed that α+β phases of different proportions were formed after heat treatment, the grain size of the alloy treated at 950℃ slightly increased, because of the existence of the original α grain, the orientation of the α grain was not significantly changed by heat treatment below the β transition temperature. However, heat treatment above β transition temperature significantly changed the orientation of α grains. Electrochemical measurements were conducted in artificial saliva solution and artificial saliva solution containing hydrogen peroxide. The results showed that the corrosion resistance of the original Ti-Mo-Zr alloy was better than that of the Ti-Mo-Zr alloy treated at 950°C and worse than that of the Ti-Mo-Zr alloy treated at 1050°C. The differences in corrosion behavior can be attributed to grain size and orientation and phase distribution.
{"title":"Microstructure and corrosion behavior of Ti-Mo-Zr alloy fabricated by selective laser melting in simulated oral environment","authors":"Kexuan Wang , Gaohan Cao , Yi Cai , Xingbiao Zhou , Chen Xu , Xuyong Zheng , Binbin Zhang","doi":"10.1016/j.ijoes.2024.100829","DOIUrl":"10.1016/j.ijoes.2024.100829","url":null,"abstract":"<div><div>The microstructure of Ti-Mo-Zr alloy fabricated by selective laser melting (SLM) was studied and its corrosion behavior was investigated by a series of electrochemical methods. The results showed that α+β phases of different proportions were formed after heat treatment, the grain size of the alloy treated at 950℃ slightly increased, because of the existence of the original α grain, the orientation of the α grain was not significantly changed by heat treatment below the β transition temperature. However, heat treatment above β transition temperature significantly changed the orientation of α grains. Electrochemical measurements were conducted in artificial saliva solution and artificial saliva solution containing hydrogen peroxide. The results showed that the corrosion resistance of the original Ti-Mo-Zr alloy was better than that of the Ti-Mo-Zr alloy treated at 950°C and worse than that of the Ti-Mo-Zr alloy treated at 1050°C. The differences in corrosion behavior can be attributed to grain size and orientation and phase distribution.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100829"},"PeriodicalIF":1.3,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-09DOI: 10.1016/j.ijoes.2024.100828
Dasen Shen , Junli Pan , Na Wang , Shouqiang Huang , Weiqiao Liu , Binglong Zhu , Hongying Lv
To address the structural defects and poor electrical conductivity of conventional Prussian blue analogues (PBAs) samples, in this study, nickel hexacyanoferrate (NiHCF) and nickel hexacyanoferrate epitaxially grown with iron hexacyanoferrate (Ni@FeHCF-X) series of samples were successfully synthesized by co-precipitation combined with epitaxial growth technique, and their structural and electrochemical properties were systematically characterized. X-ray powder diffractometer (XRD) results show that all the samples maintain a cubic crystal system structure, and the diffraction peaks of the (220) and (400) crystal planes are shifted to a lower angle with the epitaxial growth of ferric hexacyanoferrate (FeHCF). The successful embedding of Fe was confirmed by inductively coupled plasma (ICP) measurement data. Scanning electron microscope (SEM) images show that the samples are in a cubic morphology, and the surfaces gradually become rounded from sharp to rounded with the increase of the Fe content. High-resolution transmission electron microscope (HRTEM) and energy-dispersive spectrometer (EDS) analyses confirm the successful construction of the core-shell structure and the homogeneous distribution of the elements. Electrochemical testing showed that the Ni@FeHCF-X samples exhibited higher specific capacities and superior rate performance compared to NiHCF, particularly the Ni@FeHCF-4 sample, which delivered a high specific capacity of 73.4 mAh·g⁻¹ at a current density of 100 mA·g⁻¹, significantly outperforming the 38.2 mAh·g⁻¹ achieved by NiHCF. Additionally, the capacity retention rate of Ni@FeHCF-4 reached 42.16 %. Electrochemical impedance spectroscopy (EIS) further confirmed the reduced charge transfer resistance and enhanced reversibility of the electrochemical reactions in the Ni@FeHCF-X samples. These results demonstrate that Ni@FeHCF-4 significantly enhances the electrochemical performance of the samples in aqueous sodium-ion battery, providing new insights into the design of cathode materials for sodium-ion batteries.
{"title":"Optimization of sodium-ion battery cathode performance by nickel-based Prussian blue epitaxial growth with iron-based Prussian blue core-shell structure","authors":"Dasen Shen , Junli Pan , Na Wang , Shouqiang Huang , Weiqiao Liu , Binglong Zhu , Hongying Lv","doi":"10.1016/j.ijoes.2024.100828","DOIUrl":"10.1016/j.ijoes.2024.100828","url":null,"abstract":"<div><div>To address the structural defects and poor electrical conductivity of conventional Prussian blue analogues (PBAs) samples, in this study, nickel hexacyanoferrate (NiHCF) and nickel hexacyanoferrate epitaxially grown with iron hexacyanoferrate (Ni@FeHCF-X) series of samples were successfully synthesized by co-precipitation combined with epitaxial growth technique, and their structural and electrochemical properties were systematically characterized. X-ray powder diffractometer (XRD) results show that all the samples maintain a cubic crystal system structure, and the diffraction peaks of the (220) and (400) crystal planes are shifted to a lower angle with the epitaxial growth of ferric hexacyanoferrate (FeHCF). The successful embedding of Fe was confirmed by inductively coupled plasma (ICP) measurement data. Scanning electron microscope (SEM) images show that the samples are in a cubic morphology, and the surfaces gradually become rounded from sharp to rounded with the increase of the Fe content. High-resolution transmission electron microscope (HRTEM) and energy-dispersive spectrometer (EDS) analyses confirm the successful construction of the core-shell structure and the homogeneous distribution of the elements. Electrochemical testing showed that the Ni@FeHCF-X samples exhibited higher specific capacities and superior rate performance compared to NiHCF, particularly the Ni@FeHCF-4 sample, which delivered a high specific capacity of 73.4 mAh·g⁻¹ at a current density of 100 mA·g⁻¹, significantly outperforming the 38.2 mAh·g⁻¹ achieved by NiHCF. Additionally, the capacity retention rate of Ni@FeHCF-4 reached 42.16 %. Electrochemical impedance spectroscopy (EIS) further confirmed the reduced charge transfer resistance and enhanced reversibility of the electrochemical reactions in the Ni@FeHCF-X samples. These results demonstrate that Ni@FeHCF-4 significantly enhances the electrochemical performance of the samples in aqueous sodium-ion battery, providing new insights into the design of cathode materials for sodium-ion batteries.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100828"},"PeriodicalIF":1.3,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142535610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Due to the prevailing energy shortages, the pursuit of new alternative energy sources is becoming increasingly urgent. Hydrogen production through water electrolysis has emerged as a crucial method. However, the sluggish four-electron reaction in the oxygen evolution reaction (OER) remains the primary rate-limiting step. In this study, we synthesized a heterostructure La(OH)3@CuO-P material on the nickel foam (NF) substrate. The experimental results demonstrate that after phosphating treatment, the heterostructure La(OH)3@CuO-P exhibits exceptional catalytic performance with only 215 mV overpotential, a Tafel slope value of 79.36 mV/dec, and a bilayer capacitance of 39.02 mF/cm2 at a current density of 10 mA/cm2 for OER in a 1 M KOH solution. These values are significantly superior compared to those obtained using heterostructure La(OH)3@CuO alone which showed an overpotential value of 365 mV at a current density of 10 mA/cm2. Moreover, during cyclic voltammetry testing for up to 500 cycles, La(OH)3@CuO-P also demonstrates relatively stable performance. Analyses suggest that composite heterostructure effectively addresses issues such as insufficient conductivity of La(OH)3 and monomer aggregation tendency for CuO while maintaining excellent properties for each component. By incorporating P atoms as dopants, the interaction between La, Cu, and P atoms not only facilitates fine-tuning of the electronic structure and optimization of the adsorption free energy (-OH), but also promotes an increase in catalytic active sites through sample size reduction, thereby further augmenting the performance of the OER.
由于能源普遍短缺，寻找新的替代能源变得日益迫切。通过电解水制氢已成为一种重要方法。然而，氧进化反应（OER）中缓慢的四电子反应仍然是主要的限速步骤。在本研究中，我们在泡沫镍（NF）基底上合成了一种异质结构 La(OH)3@CuO-P 材料。实验结果表明，经磷化处理后，异质结构 La(OH)3@CuO-P 表现出优异的催化性能，在 1 M KOH 溶液中进行 OER 时，过电位仅为 215 mV，Tafel 斜坡值为 79.36 mV/dec，电流密度为 10 mA/cm2 时，双电层电容为 39.02 mF/cm2。与单独使用异质结构 La(OH)3@CuO（在 10 mA/cm2 的电流密度下，过电位值为 365 mV）相比，这些数值明显更优。此外，在长达 500 个循环的循环伏安测试中，La(OH)3@CuO-P 也表现出相对稳定的性能。分析表明，复合异质结构有效地解决了 La(OH)3 的导电性不足和 CuO 的单体聚集倾向等问题，同时保持了各组分的优异性能。通过加入 P 原子作为掺杂剂，La、Cu 和 P 原子间的相互作用不仅有助于微调电子结构和优化吸附自由能 (-OH)，还能通过减小样品尺寸增加催化活性位点，从而进一步提高 OER 的性能。
{"title":"Phosphorus doping heterostructure La(OH)3@CuO @NF as an advanced electrocatalyst for the oxygen evolution reaction","authors":"Dandan Liang , Weili Hou , Ying Zhang , Jihua Shang , Haibo Ren , Yufeng Sun","doi":"10.1016/j.ijoes.2024.100826","DOIUrl":"10.1016/j.ijoes.2024.100826","url":null,"abstract":"<div><div>Due to the prevailing energy shortages, the pursuit of new alternative energy sources is becoming increasingly urgent. Hydrogen production through water electrolysis has emerged as a crucial method. However, the sluggish four-electron reaction in the oxygen evolution reaction (OER) remains the primary rate-limiting step. In this study, we synthesized a heterostructure La(OH)<sub>3</sub>@CuO-P material on the nickel foam (NF) substrate. The experimental results demonstrate that after phosphating treatment, the heterostructure La(OH)<sub>3</sub>@CuO-P exhibits exceptional catalytic performance with only 215 mV overpotential, a Tafel slope value of 79.36 mV/dec, and a bilayer capacitance of 39.02 mF/cm<sup>2</sup> at a current density of 10 mA/cm<sup>2</sup> for OER in a 1 M KOH solution. These values are significantly superior compared to those obtained using heterostructure La(OH)<sub>3</sub>@CuO alone which showed an overpotential value of 365 mV at a current density of 10 mA/cm<sup>2</sup>. Moreover, during cyclic voltammetry testing for up to 500 cycles, La(OH)<sub>3</sub>@CuO-P also demonstrates relatively stable performance. Analyses suggest that composite heterostructure effectively addresses issues such as insufficient conductivity of La(OH)<sub>3</sub> and monomer aggregation tendency for CuO while maintaining excellent properties for each component. By incorporating P atoms as dopants, the interaction between La, Cu, and P atoms not only facilitates fine-tuning of the electronic structure and optimization of the adsorption free energy (-OH), but also promotes an increase in catalytic active sites through sample size reduction, thereby further augmenting the performance of the OER.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100826"},"PeriodicalIF":1.3,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-05DOI: 10.1016/j.ijoes.2024.100824
Xi Huang, Haojun Jiang, Kun Cao, Wenheng Huang, Jiachun Liu, Binyue Liu, Hong Wang
The inhibition effect of tetrabutylphosphonium benzotriazolate (TBPB) on carbon steel in a 1 mol·L−1 HCl solution was investigated using a combination of analytical techniques, including polarization curve, electrochemical impedance spectroscopy, scanning electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. The study revealed that TBPB acts as a mixed corrosion inhibitor for carbon steel in acidic conditions. The efficiency of corrosion inhibition was observed to increase gradually with rising TBPB concentrations, reaching a maximum of 92 % at a concentration of 10 mmol·L−1. This enhancement in corrosion inhibition efficiency is attributed to the adsorption of TBPB on the metal surface, effectively isolating it from the corrosive medium and thereby preventing corrosion reactions. Importantly, this mechanism aligns well with the Langmuir isothermal adsorption model.
{"title":"Corrosion inhibition of tetrabutylphosphonium benzotriazolate on carbon steel in acidic medium","authors":"Xi Huang, Haojun Jiang, Kun Cao, Wenheng Huang, Jiachun Liu, Binyue Liu, Hong Wang","doi":"10.1016/j.ijoes.2024.100824","DOIUrl":"10.1016/j.ijoes.2024.100824","url":null,"abstract":"<div><div>The inhibition effect of tetrabutylphosphonium benzotriazolate (TBPB) on carbon steel in a 1 mol·L<sup>−1</sup> HCl solution was investigated using a combination of analytical techniques, including polarization curve, electrochemical impedance spectroscopy, scanning electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. The study revealed that TBPB acts as a mixed corrosion inhibitor for carbon steel in acidic conditions. The efficiency of corrosion inhibition was observed to increase gradually with rising TBPB concentrations, reaching a maximum of 92 % at a concentration of 10 mmol·L<sup>−1</sup>. This enhancement in corrosion inhibition efficiency is attributed to the adsorption of TBPB on the metal surface, effectively isolating it from the corrosive medium and thereby preventing corrosion reactions. Importantly, this mechanism aligns well with the Langmuir isothermal adsorption model.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100824"},"PeriodicalIF":1.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-05DOI: 10.1016/j.ijoes.2024.100822
Lin Li , Yao Huang , Ji-Zheng Yao , Gao-Qun Zhang , Zhan-Feng Deng , Bin Zhang
A TiZrNbC coating was deposited on the TA1 substrate by magnetron sputtering technology, and the corrosion behaviors of the TiZrNbC coating in a simulated proton exchange membrane water electrolysis (PEMWE) environment under fluctuating potentials were investigated. The microstructures and elemental distributions of the coating were characterized by SEM and EDS. The PEMWE environment was simulated using a dilute H2SO4 solution with pH = 3 and a 5 ppm of fluoride (F-) ions addition, and polarization tests were conducted under the potentials with constant, square and triangular waveforms. The corrosion resistances of the TiZrNbC-coated and bare TA1 substrates were characterized by potentiodynamic polarization, electrochemical impedance spectroscopy and interfacial contact resistance tests. Compared to the bare TA1 substrates, the TiZrNbC-coated TA1 substrates exhibited lower corrosion current densities, higher polarization resistances and lower contact resistances, demonstrating a superior corrosion resistance.
{"title":"Corrosion behavior of TiZrNbC coatings on TA1 substrates in simulated PEM water electrolysis","authors":"Lin Li , Yao Huang , Ji-Zheng Yao , Gao-Qun Zhang , Zhan-Feng Deng , Bin Zhang","doi":"10.1016/j.ijoes.2024.100822","DOIUrl":"10.1016/j.ijoes.2024.100822","url":null,"abstract":"<div><div>A TiZrNbC coating was deposited on the TA1 substrate by magnetron sputtering technology, and the corrosion behaviors of the TiZrNbC coating in a simulated proton exchange membrane water electrolysis (PEMWE) environment under fluctuating potentials were investigated. The microstructures and elemental distributions of the coating were characterized by SEM and EDS. The PEMWE environment was simulated using a dilute H<sub>2</sub>SO<sub>4</sub> solution with pH = 3 and a 5 ppm of fluoride (F<sup>-</sup>) ions addition, and polarization tests were conducted under the potentials with constant, square and triangular waveforms. The corrosion resistances of the TiZrNbC-coated and bare TA1 substrates were characterized by potentiodynamic polarization, electrochemical impedance spectroscopy and interfacial contact resistance tests. Compared to the bare TA1 substrates, the TiZrNbC-coated TA1 substrates exhibited lower corrosion current densities, higher polarization resistances and lower contact resistances, demonstrating a superior corrosion resistance.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100822"},"PeriodicalIF":1.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Phenolic compounds are considered to be major environmental pollutants because of their toxicity and hazard on the marine ecosystem and human health even at low concentrations. An ultrasensitive biosensor was fabricated by immobilizing polyphenol oxidase into a composite of transition metal carbides (MXene)-yttrium oxide (Y2O3) for the detection of catechol in environmental water bodies. The morphology and electrochemical performance of the as-prepared biosensors were investigated using scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV), respectively. Under the optimal pH value and applied potential, the biosensor exhibited a linear response range from 0.04 to 3.2 µM (R2 = 0.9974) with an excellent sensitivity of 2294.8 mA·M−1. The limit of detection (LOD) was found to be 7 nM (S/N = 3) with acceptable repeatability and reproducibility. The interference from ascorbic acid, uric acid, CuSO4, MgSO4, FeCl3, CaCl2, and ZnSO4 was also investigated. The proposed biosensor was used for the determination of trace catechol in real water samples with satisfactory results compared with that of HPLC. The construction of MXene-Y2O3 composite is expected to be a platform for immobilizing enzymes to prepare versatile electrochemical biosensors.
{"title":"Biosensor based on MXene-Y2O3 composite for ultrasensitive detection of catechol in water samples","authors":"Haifan Chen , Gongwei Xia , Jianfang Chen , Hao Zheng","doi":"10.1016/j.ijoes.2024.100823","DOIUrl":"10.1016/j.ijoes.2024.100823","url":null,"abstract":"<div><div>Phenolic compounds are considered to be major environmental pollutants because of their toxicity and hazard on the marine ecosystem and human health even at low concentrations. An ultrasensitive biosensor was fabricated by immobilizing polyphenol oxidase into a composite of transition metal carbides (MXene)-yttrium oxide (Y<sub>2</sub>O<sub>3</sub>) for the detection of catechol in environmental water bodies. The morphology and electrochemical performance of the as-prepared biosensors were investigated using scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV), respectively. Under the optimal pH value and applied potential, the biosensor exhibited a linear response range from 0.04 to 3.2 µM (R<sup>2</sup> = 0.9974) with an excellent sensitivity of 2294.8 mA·M<sup>−1</sup>. The limit of detection (LOD) was found to be 7 nM (S/N = 3) with acceptable repeatability and reproducibility. The interference from ascorbic acid, uric acid, CuSO<sub>4</sub>, MgSO<sub>4</sub>, FeCl<sub>3</sub>, CaCl<sub>2</sub>, and ZnSO<sub>4</sub> was also investigated. The proposed biosensor was used for the determination of trace catechol in real water samples with satisfactory results compared with that of HPLC. The construction of MXene-Y<sub>2</sub>O<sub>3</sub> composite is expected to be a platform for immobilizing enzymes to prepare versatile electrochemical biosensors.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100823"},"PeriodicalIF":1.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-05DOI: 10.1016/j.ijoes.2024.100818
Siyi Chen , Shujun Chen , Yuanhui Wu , Yang Liu , Hai Zhang , Zhishuo Yan
Solanum tuberosum leaf extract (STLs), used as a biodegradable corrosion inhibitor, was prepared to mitigate the corrosion rate of Q235 steel in HCl medium. The active inhibitory components existing in STLs were tracked by Fourier transform infrared spectroscopy. Electrochemical measurements, morphological characterization and contact angle tests were combined to evaluate the anti-corrosion performance of STLs at various concentrations and different temperatures, and the results show that the addition of STLs can evidently magnify the charge transfer resistance, expand the double layer capacitance at electric/solution interface, and simultaneously reduce the corrosion current density of Q235 steel in HCl medium with the maximum inhibition efficiency of 91.89 %. The adsorption behavior of STLs on steel was investigated using X-ray photoelectron spectroscopy and adsorption models. It is revealed that the molecules of STLs spontaneously bind to the substrate through chemical and physical action, forming a protective layer to block the diffusion pathway of harsh ions. Furthermore, theoretical calculations confirm that Solanum tuberosum leaves components were adsorbed on steel substrates through donor-acceptor interactions.
{"title":"Solanum tuberosum leaf extract as an eco-friendly corrosion inhibitor for Q235-steel in HCl medium: Experimental and theoretical evaluation","authors":"Siyi Chen , Shujun Chen , Yuanhui Wu , Yang Liu , Hai Zhang , Zhishuo Yan","doi":"10.1016/j.ijoes.2024.100818","DOIUrl":"10.1016/j.ijoes.2024.100818","url":null,"abstract":"<div><div>Solanum tuberosum leaf extract (STLs), used as a biodegradable corrosion inhibitor, was prepared to mitigate the corrosion rate of Q235 steel in HCl medium. The active inhibitory components existing in STLs were tracked by Fourier transform infrared spectroscopy. Electrochemical measurements, morphological characterization and contact angle tests were combined to evaluate the anti-corrosion performance of STLs at various concentrations and different temperatures, and the results show that the addition of STLs can evidently magnify the charge transfer resistance, expand the double layer capacitance at electric/solution interface, and simultaneously reduce the corrosion current density of Q235 steel in HCl medium with the maximum inhibition efficiency of 91.89 %. The adsorption behavior of STLs on steel was investigated using X-ray photoelectron spectroscopy and adsorption models. It is revealed that the molecules of STLs spontaneously bind to the substrate through chemical and physical action, forming a protective layer to block the diffusion pathway of harsh ions. Furthermore, theoretical calculations confirm that Solanum tuberosum leaves components were adsorbed on steel substrates through donor-acceptor interactions.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100818"},"PeriodicalIF":1.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-04DOI: 10.1016/j.ijoes.2024.100817
Dan Shao , Liangyong Hu , Jiangyun Zhang , Ruiqi Hu , Guoqing Zhang , Liqin Jiang , Xiaoyong Wang , Yuliang Wen
At low temperatures, the charge/discharge capacity of lithium-ion batteries (LIB) applied in electric vehicles (EVs) will show a significant degradation. Additionally, LIB are difficult to charge, and their negative surface can easily accumulate and form lithium metal. The growth of lithium dendrites will impale the diaphragm, resulting in a short circuit inside the battery, which promotes the thermal runaway (TR) risk. Hence, it is essential to preheat power batteries rapidly and uniformly in extremely low-temperature climates. In this paper, first, the effect of low temperature conditions on LIB properties is described in detail. Second, a concreted classification of power battery low-temperature preheating strategies is carried out. Following that, the advantages and disadvantages of various warming-up strategies are systematically compared and analyzed. Eventually, the research recommendations are highlighted considering the future development trend of low-temperature heating technology. This paper provides theoretical guidance and has engineering application value for the enhancement and industrialization popularization of preheating schemes, as well as the improvement of thermal safety of electrically driven motors.
{"title":"Advanced low-temperature preheating strategies for power lithium-ion batteries applied in electric vehicles: A review","authors":"Dan Shao , Liangyong Hu , Jiangyun Zhang , Ruiqi Hu , Guoqing Zhang , Liqin Jiang , Xiaoyong Wang , Yuliang Wen","doi":"10.1016/j.ijoes.2024.100817","DOIUrl":"10.1016/j.ijoes.2024.100817","url":null,"abstract":"<div><div>At low temperatures, the charge/discharge capacity of lithium-ion batteries (LIB) applied in electric vehicles (EVs) will show a significant degradation. Additionally, LIB are difficult to charge, and their negative surface can easily accumulate and form lithium metal. The growth of lithium dendrites will impale the diaphragm, resulting in a short circuit inside the battery, which promotes the thermal runaway (TR) risk. Hence, it is essential to preheat power batteries rapidly and uniformly in extremely low-temperature climates. In this paper, first, the effect of low temperature conditions on LIB properties is described in detail. Second, a concreted classification of power battery low-temperature preheating strategies is carried out. Following that, the advantages and disadvantages of various warming-up strategies are systematically compared and analyzed. Eventually, the research recommendations are highlighted considering the future development trend of low-temperature heating technology. This paper provides theoretical guidance and has engineering application value for the enhancement and industrialization popularization of preheating schemes, as well as the improvement of thermal safety of electrically driven motors.</div></div>","PeriodicalId":13872,"journal":{"name":"International Journal of Electrochemical Science","volume":"19 11","pages":"Article 100817"},"PeriodicalIF":1.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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