Electrochemistry Communications最新文献

英文中文

Titanium deoxidation mechanism probed using an electron beam melting method

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107856

Hyun chul Kim , Namhun Kwon , Jae-Hong Shin , Dong hyun Kim , Soong Ju Oh , Kyoung-Tae Park

In this study, we examine the volatilization of oxygen in titanium under electron beam melting (EBM) conditions, correlating the beam output with oxygen content changes. The potential for titanium deoxidation through the application of electron beams remains a subject of ongoing debate. To verify this experimentally, the effects of electron beam processing on the oxygen contents of different titanium raw materials are quantified by nitrogen/oxygen analysis. Moreover, the mechanism of oxygen diffusion in titanium, which is affected by the positively charged surface layer generated by the electron beam, is evaluated by determining the corresponding activation energy using density functional theory (DFT) calculations. An average reduction of oxygen concentration by 50 % was observed following EBM. Residual gas analysis confirmed the evolution of oxygen gas over a duration of 10 min. Thermodynamic calculations indicate that deoxidation is feasible at temperatures exceeding 4,000 K in a vacuum of approximately 5

\times

10⁻⁷ Torr, thereby substantiating the potential for deoxidation. Furthermore, DFT calculations demonstrated that the oxygen diffusion coefficient increases proportionally with an increase in positive surface charge, thereby facilitating the removal of oxygen in an electron beam environment.

{"title":"Titanium deoxidation mechanism probed using an electron beam melting method","authors":"Hyun chul Kim , Namhun Kwon , Jae-Hong Shin , Dong hyun Kim , Soong Ju Oh , Kyoung-Tae Park","doi":"10.1016/j.elecom.2024.107856","DOIUrl":"10.1016/j.elecom.2024.107856","url":null,"abstract":"<div><div>In this study, we examine the volatilization of oxygen in titanium under electron beam melting (EBM) conditions, correlating the beam output with oxygen content changes. The potential for titanium deoxidation through the application of electron beams remains a subject of ongoing debate. To verify this experimentally, the effects of electron beam processing on the oxygen contents of different titanium raw materials are quantified by nitrogen/oxygen analysis. Moreover, the mechanism of oxygen diffusion in titanium, which is affected by the positively charged surface layer generated by the electron beam, is evaluated by determining the corresponding activation energy using density functional theory (DFT) calculations. An average reduction of oxygen concentration by 50 % was observed following EBM. Residual gas analysis confirmed the evolution of oxygen gas over a duration of 10 min. Thermodynamic calculations indicate that deoxidation is feasible at temperatures exceeding 4,000 K in a vacuum of approximately 5 <span><math><mrow><mo>×</mo></mrow></math></span> 10<sup>−7</sup> Torr, thereby substantiating the potential for deoxidation. Furthermore, DFT calculations demonstrated that the oxygen diffusion coefficient increases proportionally with an increase in positive surface charge, thereby facilitating the removal of oxygen in an electron beam environment.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107856"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic study on the anodic dissolution of 304 stainless steel with elastic stress in sodium chloride solution

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107847

Jiayue Zhou, Guangming Ding, Qincheng Li, Pengyu Yang, Yongyan Zhu

Effects of elastic stresses on the anodic dissolution of 304 stainless steel (SS) in 0.5 mol·dm⁻³ NaCl solution have been investigated by potentiodynamic polarization technique, scanning electron microscopy (SEM) and digital holography (DH). From the polarization curves, the SEM morphologies and the phase reconstruction maps, the effects of tensile and compressive stresses on the anodic dissolution of 304 SS have been analyzed. The tensile stresses and the large compressive stresses promote the anodic dissolution and increase the pitting susceptibility of 304 SS. However, the small compressive stress inhibits the anodic dissolution and decreases the pitting susceptibility of 304 SS. In this study, DH was used to observe the surface reactivity distribution of both the tensile and compressive stressed regions of the same sample. The conclusions obtained from the in-situ observations with DH are consistent with those drawn from the electrochemical measurements and the surface morphologies.

引用次数: 0

Visualization of lithiated/delithiated particle distribution in Li4Ti5O12 electrode by ultralow-voltage scanning electron microscopy imaging

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107849

Mitsunori Kitta

Characterization of the spatial distribution of lithiated/delithiated particles in Li-ion battery electrodes would facilitate an understanding of the reactions taking place. Here, ultralow-voltage (<1 kV) accelerated scanning electron microscopy (ULV-SEM) was used to visualize the distribution of lithiated/delithiated particles in the Li₄Ti₅O₁₂ electrode. A conductive additive-free electrode was prepared using commercially available Li₄Ti₅O₁₂ powder and partially lithiated using an electrochemical cell. The secondary electron (SE) image of the partially lithiated electrode acquired at an acceleration volage of 500 V shows a clear distribution of the lithiated/delithiated secondary particles. The contrast of the high-angle backscattered electron (HA-BSE) image of the corresponding voltage is different from that of the SE mode, providing heterogeneous physical information on the secondary particles in the electrode, such as inhomogeneous surface electronic conductive pathway of each particle. With its facile and high-throughput screening, ULV-SEM imaging is a promising method for characterizing LIB electrodes and clarifying the reactions occurring.

{"title":"Visualization of lithiated/delithiated particle distribution in Li4Ti5O12 electrode by ultralow-voltage scanning electron microscopy imaging","authors":"Mitsunori Kitta","doi":"10.1016/j.elecom.2024.107849","DOIUrl":"10.1016/j.elecom.2024.107849","url":null,"abstract":"<div><div>Characterization of the spatial distribution of lithiated/delithiated particles in Li-ion battery electrodes would facilitate an understanding of the reactions taking place. Here, ultralow-voltage (<1 kV) accelerated scanning electron microscopy (ULV-SEM) was used to visualize the distribution of lithiated/delithiated particles in the Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> electrode. A conductive additive-free electrode was prepared using commercially available Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> powder and partially lithiated using an electrochemical cell. The secondary electron (SE) image of the partially lithiated electrode acquired at an acceleration volage of 500 V shows a clear distribution of the lithiated/delithiated secondary particles. The contrast of the high-angle backscattered electron (HA-BSE) image of the corresponding voltage is different from that of the SE mode, providing heterogeneous physical information on the secondary particles in the electrode, such as inhomogeneous surface electronic conductive pathway of each particle. With its facile and high-throughput screening, ULV-SEM imaging is a promising method for characterizing LIB electrodes and clarifying the reactions occurring.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107849"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In situ synthesis of Mo-doped carbon-coated NiCo2S4 nanosheet networks for supercapacitors

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107853

Kaiyu Wang , Fan Zhou , Jiangnan Chu , Wenchong Ouyang , Kun Wang , Zhengwei Wu

Supercapacitors offer numerous advantages, including high power output, quick charging and discharging rates, and stable cycling performance. Nevertheless, their energy density and cycle life still fall short of current industry demands for energy storage. To address these challenges, this work fabricated nanostructured electrodes by synthesizing molybdenum-doped carbon-coated NiCo₂S₄ (C@NiCo₂S₄-Mo), using NiCo₂S₄ as the precursor. The doping of molybdenum, a transition metal with many oxidation states, significantly improved the electronic structure and stability of the electrode material. Additionally, incorporating a carbon-coated structure enhanced the material’s stability during cycling, extending its operational lifespan. The results demonstrated that C@NiCo₂S₄-Mo exhibited exceptional electrochemical properties, featuring a defined capacitance of 931.75 Farad/g under the current flux of 1 A/g. This high specific capacitance value, a vital factor regarding capacitor performance, directly influences the energy storage capacity of the device, indicating the high potential of the C@NiCo₂S₄-Mo material for supercapacitors. It was observed that the particular capacity retention was 76.6 % when the current density was increased by a factor of 10. The substance also showed favorable pseudocapacitive characteristics, retaining 87.7 % of its particular capacitance after prolonged cycling in cyclic voltammetry (CV) tests, highlighting its outstanding cyclic stability. Furthermore, supercapacitors constructed from C@NiCo₂S₄-Mo achieved an energy density of 14.5 Wh/kg at a power density of 700 kW/kg, making them promising candidates for energy storage applications.

{"title":"In situ synthesis of Mo-doped carbon-coated NiCo2S4 nanosheet networks for supercapacitors","authors":"Kaiyu Wang , Fan Zhou , Jiangnan Chu , Wenchong Ouyang , Kun Wang , Zhengwei Wu","doi":"10.1016/j.elecom.2024.107853","DOIUrl":"10.1016/j.elecom.2024.107853","url":null,"abstract":"<div><div>Supercapacitors offer numerous advantages, including high power output, quick charging and discharging rates, and stable cycling performance. Nevertheless, their energy density and cycle life still fall short of current industry demands for energy storage. To address these challenges, this work fabricated nanostructured electrodes by synthesizing molybdenum-doped carbon-coated NiCo<sub>2</sub>S<sub>4</sub> (C@NiCo<sub>2</sub>S<sub>4</sub>-Mo), using NiCo<sub>2</sub>S<sub>4</sub> as the precursor. The doping of molybdenum, a transition metal with many oxidation states, significantly improved the electronic structure and stability of the electrode material. Additionally, incorporating a carbon-coated structure enhanced the material’s stability during cycling, extending its operational lifespan. The results demonstrated that C@NiCo<sub>2</sub>S<sub>4</sub>-Mo exhibited exceptional electrochemical properties, featuring a defined capacitance of 931.75 Farad/g under the current flux of 1 A/g. This high specific capacitance value, a vital factor regarding capacitor performance, directly influences the energy storage capacity of the device, indicating the high potential of the C@NiCo<sub>2</sub>S<sub>4</sub>-Mo material for supercapacitors. It was observed that the particular capacity retention was 76.6 % when the current density was increased by a factor of 10. The substance also showed favorable pseudocapacitive characteristics, retaining 87.7 % of its particular capacitance after prolonged cycling in cyclic voltammetry (CV) tests, highlighting its outstanding cyclic stability. Furthermore, supercapacitors constructed from C@NiCo<sub>2</sub>S<sub>4</sub>-Mo achieved an energy density of 14.5 Wh/kg at a power density of 700 kW/kg, making them promising candidates for energy storage applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107853"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TiO2 nanotubes grown on Ti and Ti6Al4V alloy spheres by bipolar anodization

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107855

Marcela Sepúlveda , Hanna Sopha , Veronika Cicmancova , Ludek Hromadko , Jan M. Macak

In this work, the anodization of spheres of Ti and Ti6Al4V alloy (TiAlV) in glycerol-based electrolytes using bipolar electrochemistry is shown for the first time. TiO₂ nanotube (TNT) layers were found over the entire surface area of the Ti and TiAlV spheres using a square wave potential of ±60 V and ±65 V with 5.56 × 10⁻⁴ Hz. The TNTs’ inner diameter on the extremities of the Ti spheres was ∼63 nm and ∼78 nm, for ±60 V and ±65 V, respectively. The inner diameter of the TNTs fabricated on the TiAlV spheres was ∼36 nm and ∼43 nm for ±60 V and ±65 V, respectively. The effect of the alloying elements of the TiAlV spheres on the TNT layers was also investigated. To estimate the effective potential on the spheres contributing to the TNT layer formation, also the conventional anodization was performed on flat Ti and TiAlV foils for comparison. It was found that the effective potential reached on the extremities of the Ti and TiAlV spheres near the feeder electrodes was only 29 % and 16 % of the applied potential, respectively.

{"title":"TiO2 nanotubes grown on Ti and Ti6Al4V alloy spheres by bipolar anodization","authors":"Marcela Sepúlveda , Hanna Sopha , Veronika Cicmancova , Ludek Hromadko , Jan M. Macak","doi":"10.1016/j.elecom.2024.107855","DOIUrl":"10.1016/j.elecom.2024.107855","url":null,"abstract":"<div><div>In this work, the anodization of spheres of Ti and Ti6Al4V alloy (TiAlV) in glycerol-based electrolytes using bipolar electrochemistry is shown for the first time. TiO<sub>2</sub> nanotube (TNT) layers were found over the entire surface area of the Ti and TiAlV spheres using a square wave potential of ±60 V and ±65 V with 5.56 × 10<sup>−4</sup> Hz. The TNTs’ inner diameter on the extremities of the Ti spheres was ∼63 nm and ∼78 nm, for ±60 V and ±65 V, respectively. The inner diameter of the TNTs fabricated on the TiAlV spheres was ∼36 nm and ∼43 nm for ±60 V and ±65 V, respectively. The effect of the alloying elements of the TiAlV spheres on the TNT layers was also investigated. To estimate the effective potential on the spheres contributing to the TNT layer formation, also the conventional anodization was performed on flat Ti and TiAlV foils for comparison. It was found that the effective potential reached on the extremities of the Ti and TiAlV spheres near the feeder electrodes was only 29 % and 16 % of the applied potential, respectively.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107855"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the cycle stability of milled Mg-Ni alloys: The role of Pd substitution on reversible electrochemical hydrogenation/dehydrogenation reactions

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107860

Jianling Huang , Jiabao Li , Yang Cai , Shiqian Zhao

The practical application of Mg-based alloys as anode materials for nickel-metal hydride (Ni-MH) batteries is hindered by serious capacity decay. To enhance their cycle stability and elucidate the underlying mechanism, this study investigates the influence of partially substituting Ni with Pd on the structural and electrochemical properties of milled Mg₅₅Ni₄₅ alloy, as well as their microstructural evolution during cycling. This work demonstrates the Pd addition enables reversible electrochemical hydrogenation/dehydrogenation reactions in the Mg₂Ni phase and enhances the electrochemical reaction kinetics of the alloys. As a result, the addition of Pd improves both cyclic performance and rate capability of the milled alloy electrodes. The Mg₅₅Ni₄₅ alloy delivers a maximum discharge capacity of 488.65 mAh/g but decays to 110 mAh/g after only 13 cycles at a discharge current density of 50 mA/g. In contrast, the Mg₅₅Pd₄Ni₄₁ alloy demonstrates a discharge capacity of 564.6 mAh/g and retains 277 mAh/g after 50 cycles. Notably, when subjected to a higher discharge current density of 300 mA/g, the Mg₅₅Pd₄Ni₄₁ alloy displays an enhanced discharge capacity (401.49 mAh/g) compared to that of the Mg₅₅Ni₄₅ alloy (77.72 mAh/g).

{"title":"Enhancing the cycle stability of milled Mg-Ni alloys: The role of Pd substitution on reversible electrochemical hydrogenation/dehydrogenation reactions","authors":"Jianling Huang , Jiabao Li , Yang Cai , Shiqian Zhao","doi":"10.1016/j.elecom.2024.107860","DOIUrl":"10.1016/j.elecom.2024.107860","url":null,"abstract":"<div><div>The practical application of Mg-based alloys as anode materials for nickel-metal hydride (Ni-MH) batteries is hindered by serious capacity decay. To enhance their cycle stability and elucidate the underlying mechanism, this study investigates the influence of partially substituting Ni with Pd on the structural and electrochemical properties of milled Mg<sub>55</sub>Ni<sub>45</sub> alloy, as well as their microstructural evolution during cycling. This work demonstrates the Pd addition enables reversible electrochemical hydrogenation/dehydrogenation reactions in the Mg<sub>2</sub>Ni phase and enhances the electrochemical reaction kinetics of the alloys. As a result, the addition of Pd improves both cyclic performance and rate capability of the milled alloy electrodes. The Mg<sub>55</sub>Ni<sub>45</sub> alloy delivers a maximum discharge capacity of 488.65 mAh/g but decays to 110 mAh/g after only 13 cycles at a discharge current density of 50 mA/g. In contrast, the Mg<sub>55</sub>Pd<sub>4</sub>Ni<sub>41</sub> alloy demonstrates a discharge capacity of 564.6 mAh/g and retains 277 mAh/g after 50 cycles. Notably, when subjected to a higher discharge current density of 300 mA/g, the Mg<sub>55</sub>Pd<sub>4</sub>Ni<sub>41</sub> alloy displays an enhanced discharge capacity (401.49 mAh/g) compared to that of the Mg<sub>55</sub>Ni<sub>45</sub> alloy (77.72 mAh/g).</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107860"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Linearly concentrating solution favors efficient and precise determination of critical pitting chloride concentration

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107859

Jia-Yi Gao, Yang Bai, Cheng-Ping Ye, Xian-Zong Wang

The critical pitting chloride concentration (CPCC) is an essential parameter for the safe service of structural alloys that sensitive to pitting corrosion. Precise lacking and time-consuming frustrates the traditional method (multiple tests), i.e., applies various solutions with different concentrations and then gradually approaches the real CPCC. Herein, a novel method (single test) was proposed to efficiently and precisely positioning CPCC, i.e., linearly increasing chloride concentration that realized by a peristaltic pump with a high precision drip rate of μL/min. Moreover, a non-linear sensitivity of CPCC to concentrating rate of chloride ion was revealed on CoCrFeNiAl_x alloys and the possible mechanism is discussed.

引用次数: 0

Design of anti-poisoning catalysts for hydrogen oxidation reaction in next-generation anion exchange membrane fuel cells

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-01-01 DOI: 10.1016/j.elecom.2024.107852

Jiho Min , Yunjin Kim , Seunghyun Lee , Keonwoo Ko , Sourabh S. Chougule , Abhishek A. Chavan , Khikmatulla Davletbaev , Beomjun Pak , Hyelim Park , Sung-Dae Yim , Namgee Jung

Extensive research has been conducted on hydrocarbon-based ionomers and membranes with high ionic conductivity and chemical stability for next-generation anion exchange membrane fuel cells (AEMFCs). However, it is well known that the benzene groups of hydrocarbon-based ionomers seriously poison the active sites of Pt catalysts, thereby reducing hydrogen oxidation reaction (HOR) activity and AEMFC performance. Over the past years, the development of benzene-tolerant catalysts has mainly focused on metal alloy nanoparticles such as PtRu, without pursuing the design of breakthrough catalyst structures that can more effectively reduce benzene poisoning. Here, we introduce an anti-poisoning catalyst structure promoted by the synergistic effect of carbon shell encapsulation and metal alloying. The porous carbon shell encapsulating the metal nanoparticles is expected to prevent direct adsorption of benzene groups, while the alloying of Pt and Ru can reduce the benzene adsorption energy itself. Comparative electrochemical analysis results confirm that the carbon shell-encapsulated metal alloy catalyst significantly alleviate benzene poisoning, exhibiting superior HOR activity than the conventional alloys in benzyltrimethylammonium hydroxide (BTMAOH) solution.

{"title":"Design of anti-poisoning catalysts for hydrogen oxidation reaction in next-generation anion exchange membrane fuel cells","authors":"Jiho Min , Yunjin Kim , Seunghyun Lee , Keonwoo Ko , Sourabh S. Chougule , Abhishek A. Chavan , Khikmatulla Davletbaev , Beomjun Pak , Hyelim Park , Sung-Dae Yim , Namgee Jung","doi":"10.1016/j.elecom.2024.107852","DOIUrl":"10.1016/j.elecom.2024.107852","url":null,"abstract":"<div><div>Extensive research has been conducted on hydrocarbon-based ionomers and membranes with high ionic conductivity and chemical stability for next-generation anion exchange membrane fuel cells (AEMFCs). However, it is well known that the benzene groups of hydrocarbon-based ionomers seriously poison the active sites of Pt catalysts, thereby reducing hydrogen oxidation reaction (HOR) activity and AEMFC performance. Over the past years, the development of benzene-tolerant catalysts has mainly focused on metal alloy nanoparticles such as PtRu, without pursuing the design of breakthrough catalyst structures that can more effectively reduce benzene poisoning. Here, we introduce an anti-poisoning catalyst structure promoted by the synergistic effect of carbon shell encapsulation and metal alloying. The porous carbon shell encapsulating the metal nanoparticles is expected to prevent direct adsorption of benzene groups, while the alloying of Pt and Ru can reduce the benzene adsorption energy itself. Comparative electrochemical analysis results confirm that the carbon shell-encapsulated metal alloy catalyst significantly alleviate benzene poisoning, exhibiting superior HOR activity than the conventional alloys in benzyltrimethylammonium hydroxide (BTMAOH) solution.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107852"},"PeriodicalIF":4.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An electronic tongue system with automatic sample mixing function for long-term in-situ monitoring of chemical reactions 带自动样品混合功能的电子舌系统，用于对化学反应进行长期原位监测

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2024-11-23 DOI: 10.1016/j.elecom.2024.107840

Chaoxian Jia , Yuezhong Mao , Jianxi Ying , Xiaofan Guo , Shiyi Tian , Weibo Zheng , Tao Zhang , Yufen Zhao , Kun Ding , Yan Liu

As technology advanced, the demand for automation and in-situ monitoring of chemical reactions soared. This article introduced a novel in-situ monitoring device that utilized an electronic tongue system. Comprising a centrifuge, experimental unit, microfluidic chip, and electronic tongue plug (or stopper), the device facilitated simultaneous sample mixing, stimulus signaling, and response signal collection. The chip, serving as the carrier for the samples, provided a stable and sealed environment, which was crucial for electronic tongue monitoring. Acting as the plug for the chip, the electronic tongue enabled in-situ monitoring of liquids. Proven effective in studying nucleotide selection and amino acid regulation during peptide formation, this device broadened the possibilities of automated monitoring designs and was deployed in the Wentian module of Tiangong space station, advancing the application prospects of the electronic tongue system in space chemistry.

随着技术的发展，对化学反应的自动化和原位监测的需求急剧增加。本文介绍了一种利用电子舌系统的新型原位监测装置。该装置由离心机、实验装置、微流控芯片和电子舌塞（或塞子）组成，可同时进行样品混合、刺激信号传递和反应信号收集。芯片作为样本的载体，提供了稳定和密封的环境，这对电子舌监测至关重要。作为芯片的插头，电子舌实现了对液体的原位监测。该装置在研究多肽形成过程中的核苷酸选择和氨基酸调控方面被证明是有效的，它拓宽了自动监测设计的可能性，并被部署在天宫空间站的文天舱内，推进了电子舌系统在空间化学中的应用前景。

{"title":"An electronic tongue system with automatic sample mixing function for long-term in-situ monitoring of chemical reactions","authors":"Chaoxian Jia , Yuezhong Mao , Jianxi Ying , Xiaofan Guo , Shiyi Tian , Weibo Zheng , Tao Zhang , Yufen Zhao , Kun Ding , Yan Liu","doi":"10.1016/j.elecom.2024.107840","DOIUrl":"10.1016/j.elecom.2024.107840","url":null,"abstract":"<div><div>As technology advanced, the demand for automation and in-situ monitoring of chemical reactions soared. This article introduced a novel in-situ monitoring device that utilized an electronic tongue system. Comprising a centrifuge, experimental unit, microfluidic chip, and electronic tongue plug (or stopper), the device facilitated simultaneous sample mixing, stimulus signaling, and response signal collection. The chip, serving as the carrier for the samples, provided a stable and sealed environment, which was crucial for electronic tongue monitoring. Acting as the plug for the chip, the electronic tongue enabled in-situ monitoring of liquids. Proven effective in studying nucleotide selection and amino acid regulation during peptide formation, this device broadened the possibilities of automated monitoring designs and was deployed in the Wentian module of Tiangong space station, advancing the application prospects of the electronic tongue system in space chemistry.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"170 ","pages":"Article 107840"},"PeriodicalIF":4.7,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical detection of pesticides: A comprehensive review on voltammetric determination of malathion, 2,4-D, carbaryl, and glyphosate 农药的电化学检测：马拉硫磷、2,4-D、西维因和草甘膦的伏安法测定综述

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2024-11-17 DOI: 10.1016/j.elecom.2024.107839

Andualem Ejigu , Molla Tefera , Atnafu Guadie

Pesticides are widely used in agriculture to protect crops from diseases, insects, and weeds. However, a significant portion of these pesticides fail to reach their intended destination and instead contaminate the soil and water sources. As interest in on-site analyte detection continues to grow, alternative methods of pesticide measurement have gained considerable attention. This review focuses on the electrochemical detection of four important pesticides: malathion, 2,4-dichlorophenoxy acetic acid, glyphosate, and carbamates, utilizing a variety of electrochemical sensing techniques, electrode materials, electrolyte media, and sample arrays. By summarizing various electrochemical studies, the review provides an overview of reported analytical results, including limits of detection and linearity ranges. The article highlights recent advances in the electrochemical detection of selected pesticides and addresses the challenges and efforts involved in achieving electrochemical detection suitable for field applications.

农药被广泛用于农业，以保护农作物免受病虫害和杂草的侵害。然而，这些杀虫剂中有相当一部分未能达到预期目的，反而污染了土壤和水源。随着人们对现场分析检测的兴趣与日俱增，农药测量的替代方法也备受关注。本综述重点介绍利用各种电化学传感技术、电极材料、电解质介质和样品阵列对马拉硫磷、2,4-二氯苯氧乙酸、草甘膦和氨基甲酸酯这四种重要农药进行电化学检测的方法。通过总结各种电化学研究，该综述概述了报告的分析结果，包括检测限和线性范围。文章重点介绍了电化学检测某些农药的最新进展，并探讨了实现适合现场应用的电化学检测所面临的挑战和需要付出的努力。

引用次数: 0

首页上一页

下一页尾页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Electrochemistry Communications

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀