Oxide layers on silicon (Si) can effectively reduce the surface recombination velocity due to chemical and field-effect passivation, thereby increasing efficiency of PV devices. We propose simple experimental technique that provides information on interfacial Si/oxide charge. Here, interfacial charging in atmosphere of crystalline p-Si with thin hafnia layers deposited using atomic layer deposition and sol–gel techniques were studied by means of the transverse electric resistometry. The samples exhibited the current–voltage (I–V) characteristics, which were analogous to those known for a p-n junction when the Si surface is negatively charged. We also demonstrate the detection of charging effects in electrolyte by measuring the photo-induced capacitance, potential, resistance, and current. The charge transfer inhibition during hydrogen evolution reaction is shown to depend on interfacial charging effects rather than resistance of HfO2 layer. The proposed methodologies can be extended to a wider range of passivating oxides on semiconductors.
{"title":"Thin hafnia layer on silicon – Study of interfacial charging and charge transfer by resistometry and photoelectrochemistry","authors":"Aldis Šilėnas, Laurynas Staišiūnas, Putinas Kalinauskas, Konstantinas Leinartas, Asta Grigucevičienė, Andžej Lučun, Skirmantė Tutlienė, Eimutis Juzeliūnas","doi":"10.1016/j.elecom.2025.107871","DOIUrl":"10.1016/j.elecom.2025.107871","url":null,"abstract":"<div><div>Oxide layers on silicon (Si) can effectively reduce the surface recombination velocity due to chemical and field-effect passivation, thereby increasing efficiency of PV devices. We propose simple experimental technique that provides information on interfacial Si/oxide charge. Here, interfacial charging in atmosphere of crystalline p-Si with thin hafnia layers deposited using atomic layer deposition and sol–gel techniques were studied by means of the transverse electric resistometry. The samples exhibited the current–voltage (I–V) characteristics, which were analogous to those known for a p-n junction when the Si surface is negatively charged. We also demonstrate the detection of charging effects in electrolyte by measuring the photo-induced capacitance, potential, resistance, and current. The charge transfer inhibition during hydrogen evolution reaction is shown to depend on interfacial charging effects rather than resistance of HfO<sub>2</sub> layer. The proposed methodologies can be extended to a wider range of passivating oxides on semiconductors.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"171 ","pages":"Article 107871"},"PeriodicalIF":4.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132494","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}
Pub Date : 2025-02-01DOI: 10.1016/j.elecom.2024.107861
Qiushuang Wang , Ruidong Li , Junchen Li
The corrosion resistance of 347H stainless steel after hot rolling or hot extrusion has always been a focus of attention in the thermoelectric field. This work uses electrochemical evaluation methods to study the corrosion behavior of 347H stainless steel after hot compression under different temperatures. The effects of dynamic recrystallization (DRX), grain size, and grain boundary (GB) on the corrosion behavior of the material were analyzed by microstructure detection. It is found that 347H stainless steel undergoes a valley stage of corrosion properties when deformed near 1050 ℃ with a constant strain rate. The changes of grain boundary density and Σ3 boundaries caused by deformation at different temperatures are the fundamental reasons for the fluctuation of corrosion properties. These results indicate that deformation temperature is an important factor controlling the corrosion resistance of hot- compressed 347H stainless steel. This study has important reference value for the development of hot deformation technology and the improvement of corrosion resistance of 347H stainless steel.
{"title":"Effect of deformation temperature on microstructure and corrosion properties of hot-compressed 347H stainless steel","authors":"Qiushuang Wang , Ruidong Li , Junchen Li","doi":"10.1016/j.elecom.2024.107861","DOIUrl":"10.1016/j.elecom.2024.107861","url":null,"abstract":"<div><div>The corrosion resistance of 347H stainless steel after hot rolling or hot extrusion has always been a focus of attention in the thermoelectric field. This work uses electrochemical evaluation methods to study the corrosion behavior of 347H stainless steel after hot compression under different temperatures. The effects of dynamic recrystallization (DRX), grain size, and grain boundary (GB) on the corrosion behavior of the material were analyzed by microstructure detection. It is found that 347H stainless steel undergoes a valley stage of corrosion properties when deformed near 1050 ℃ with a constant strain rate. The changes of grain boundary density and Σ3 boundaries caused by deformation at different temperatures are the fundamental reasons for the fluctuation of corrosion properties. These results indicate that deformation temperature is an important factor controlling the corrosion resistance of hot- compressed 347H stainless steel. This study has important reference value for the development of hot deformation technology and the improvement of corrosion resistance of 347H stainless steel.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"171 ","pages":"Article 107861"},"PeriodicalIF":4.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131999","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}
This paper reports an electrochemical approach that uses unused or discarded biomass as a resource for renewable and sustainable methanol and hydrogen production. The biomass feedstocks tested were lignosulfonate, newspaper, pampas grass, and bamboo. Methanol was extracted through the demethylation of methoxy groups of lignin in biomass at the anode. The advantages of this method are that (1) electrolysis proceeds under mild conditions of 75 °C, atmospheric pressure, and relatively low voltage, (2) hydrogen is produced at the cathode, irrespective of the type of biomass, and (3) the residue after electrolysis can be used as fuel.
{"title":"Electrochemical production of methanol and hydrogen from biomass waste","authors":"Zichun Xiong , Kazuyo Kobayashi , Aki Miyawaki , Shinya Teranishi , Takashi Hibino","doi":"10.1016/j.elecom.2025.107862","DOIUrl":"10.1016/j.elecom.2025.107862","url":null,"abstract":"<div><div>This paper reports an electrochemical approach that uses unused or discarded biomass as a resource for renewable and sustainable methanol and hydrogen production. The biomass feedstocks tested were lignosulfonate, newspaper, pampas grass, and bamboo. Methanol was extracted through the demethylation of methoxy groups of lignin in biomass at the anode. The advantages of this method are that (1) electrolysis proceeds under mild conditions of 75 °C, atmospheric pressure, and relatively low voltage, (2) hydrogen is produced at the cathode, irrespective of the type of biomass, and (3) the residue after electrolysis can be used as fuel.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"171 ","pages":"Article 107862"},"PeriodicalIF":4.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131998","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}
Pub Date : 2025-02-01DOI: 10.1016/j.elecom.2024.107858
Rachel F. Taylor , Fernan Martinez-Jimenez , Bruce E. Logan
Thin-film composite membranes are being studied as replacements to more expensive ion exchange membranes in saltwater electrolysis for carbon neutral hydrogen production. However, a persistent challenge is transport of salt ions between a contained anolyte and saltwater catholyte rather than water ions (H+, OH−). We used a validated Nernst Planck ion transport model in COMSOL Multiphysics to simulate how the initial electrolyte pH impacts total salt ion transport within the first two hours of electrolysis, when the greatest percentage of salts cross the membrane. At fixed current densities of 10 mA cm−2 and 100 mA cm−2, setting an initial anolyte pH to 0 (rather than using a neutral pH) and catholyte pH of 14 achieved the goal of predominantly transporting water ions across the membrane, thereby accomplishing a substantial reduction in nitrate (substituting for chloride) ion transport. At the lower current density, setting the anolyte pH to 0 while leaving the catholyte pH neutral resulted in the same reduction of nitrate transport, with water ions carrying most of the charge. Thus, simply setting the solution initial conditions can substantially mitigate chloride ion transport from the catholyte to the anolyte, improving the feasibility of using saltwater electrolysis for green hydrogen production.
{"title":"Tuning initial pH to decrease salt ion transport in saltwater electrolysis","authors":"Rachel F. Taylor , Fernan Martinez-Jimenez , Bruce E. Logan","doi":"10.1016/j.elecom.2024.107858","DOIUrl":"10.1016/j.elecom.2024.107858","url":null,"abstract":"<div><div>Thin-film composite membranes are being studied as replacements to more expensive ion exchange membranes in saltwater electrolysis for carbon neutral hydrogen production. However, a persistent challenge is transport of salt ions between a contained anolyte and saltwater catholyte rather than water ions (H<sup>+</sup>, OH<sup>−</sup>). We used a validated Nernst Planck ion transport model in COMSOL Multiphysics to simulate how the initial electrolyte pH impacts total salt ion transport within the first two hours of electrolysis, when the greatest percentage of salts cross the membrane. At fixed current densities of 10 mA cm<sup>−2</sup> and 100 mA cm<sup>−2</sup>, setting an initial anolyte pH to 0 (rather than using a neutral pH) and catholyte pH of 14 achieved the goal of predominantly transporting water ions across the membrane, thereby accomplishing a substantial reduction in nitrate (substituting for chloride) ion transport. At the lower current density, setting the anolyte pH to 0 while leaving the catholyte pH neutral resulted in the same reduction of nitrate transport, with water ions carrying most of the charge. Thus, simply setting the solution initial conditions can substantially mitigate chloride ion transport from the catholyte to the anolyte, improving the feasibility of using saltwater electrolysis for green hydrogen production.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"171 ","pages":"Article 107858"},"PeriodicalIF":4.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131971","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}
This article employed the self-flux technique to successfully generate single crystalline Ni1-XCuXTe2 (X = 0 and 0.10) for electrochemical applications. The X-ray powder diffraction (XRPD) patterns revealed that both compounds have a CdI2-type trigonal structure with a P3m1 space group. The field emission scanning electron microscope (FESEM) images depicted the layered structure of these compounds. The elemental composition was analyzed via X-ray photoelectron spectroscopy (XPS). The electrochemical measuring results demonstrated that the Ni1-XCuXTe2 (X = 0 and 0.10) composite electrodes exhibit improved electrocatalytic activity, with 360 and 544 F/g capacitances, respectively. This enhancement in electrochemical performance is attributed to the addition of Cu doping and the presence of many flaws. Furthermore, Ni1-XCuXTe2 (X = 0 and 0.10) electrodes exhibited high electrochemical stability in supercapacitors (SCs). These findings suggest that the Ni1-XCuXTe2 (X = 0 and 0.10) compounds are promising candidates for SCs with increased capacitance and stability. The combination of structural properties, Cu doping, and defect-induced enhancement led to better electrochemical performance.
{"title":"Chemical Pressure-Induced enhancement of electrochemical performance in Ni1-X CuxTe2 (X = 0 and 0.10) layered compounds","authors":"Rajkumar Sokkalingam , Manikandan Krishnan , Jesman Sthevan Kovil Pitchai , Sivakumar Periyasamy , Arjun Kumar Bojarajan , Arumugam Sonachalam , Sambasivam Sangaraju","doi":"10.1016/j.elecom.2025.107872","DOIUrl":"10.1016/j.elecom.2025.107872","url":null,"abstract":"<div><div>This article employed the self-flux technique to successfully generate single crystalline Ni<sub>1-X</sub>Cu<sub>X</sub>Te<sub>2</sub> (X = 0 and 0.10) for electrochemical applications. The X-ray powder diffraction (XRPD) patterns revealed that both compounds have a CdI<sub>2</sub>-type trigonal structure with a <em>P</em>3<em>m</em>1 space group. The field emission scanning electron microscope (FESEM) images depicted the layered structure of these compounds. The elemental composition was analyzed via X-ray photoelectron spectroscopy (XPS). The electrochemical measuring results demonstrated that the Ni<sub>1-X</sub>Cu<sub>X</sub>Te<sub>2</sub> (X = 0 and 0.10) composite electrodes exhibit improved electrocatalytic activity, with 360 and 544 F/g capacitances, respectively. This enhancement in electrochemical performance is attributed to the addition of Cu doping and the presence of many flaws. Furthermore, Ni<sub>1-X</sub>Cu<sub>X</sub>Te<sub>2</sub> (X = 0 and 0.10) electrodes exhibited high electrochemical stability in supercapacitors (SCs). These findings suggest that the Ni<sub>1-X</sub>Cu<sub>X</sub>Te<sub>2</sub> (X = 0 and 0.10) compounds are promising candidates for SCs with increased capacitance and stability. The combination of structural properties, Cu doping, and defect-induced enhancement led to better electrochemical performance.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"171 ","pages":"Article 107872"},"PeriodicalIF":4.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132495","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}
Pub Date : 2025-02-01DOI: 10.1016/j.elecom.2025.107863
Hong Ju, Hanzhi Li, Lu Fang, Haitong Lu, Yifan Wei
The behavior and mechanism of local corrosion for a TA2/HAl77-2/316L SS coupling system was investigated under a seawater liquid film using coupled multielectrode arrays (CMEAs) and Electrochemical Impedance Spectroscopy (EIS) technology. Local corrosion parameters, such as the maximum potential difference (ΔEmax), the maximum anode current density (Ia,max), the local corrosion intensity factor (LCII), and the cathode to anode area ratio (Sc/Sa) were obtained to quantitatively characterize the local corrosion degree of microarray electrodes. The results showed that HAl77-2 and most of the 316L SS electrode wires in the microarray electrodes served as anodes, while TA2 and the remainder of the 316L SS electrode wires performed as cathodes. When the concentration of Cl− increased from 1.9 to 4.3 wt%, the anode potential shifted negatively and the anode current tended to increase. Under a seawater liquid film with a thickness of 200 μm and Cl− concentrations of 3.1 and 4.3 wt%, the anodic galvanic current and corrosion driving force of CMEA were relatively high. Under a seawater liquid film with a thickness of 200 μm, the anodic galvanic current, ΔEmax, Ia,max, and LCII all reached their maximum values at 60 °C. The electrochemical impedance modulus of HAl77-2 under coupled polarization conditions was smaller than that of HAl77-2 under uncoupled conditions, indicating that the polarization effect between the electrodes in the coupled state promoted the corrosion kinetics of HAl77-2.
{"title":"Investigation of local corrosion behavior and mechanism for TA2/HAl77-2/316L SS coupling systems under seawater liquid film","authors":"Hong Ju, Hanzhi Li, Lu Fang, Haitong Lu, Yifan Wei","doi":"10.1016/j.elecom.2025.107863","DOIUrl":"10.1016/j.elecom.2025.107863","url":null,"abstract":"<div><div>The behavior and mechanism of local corrosion for a TA2/HAl77-2/316L SS coupling system was investigated under a seawater liquid film using coupled multielectrode arrays (CMEAs) and Electrochemical Impedance Spectroscopy (EIS) technology. Local corrosion parameters, such as the maximum potential difference (Δ<em>E</em><sub>max</sub>), the maximum anode current density (<em>I<sub>a,</sub></em><sub>max</sub>), the local corrosion intensity factor (<em>LCII</em>), and the cathode to anode area ratio (<em>S<sub>c</sub>/S<sub>a</sub></em>) were obtained to quantitatively characterize the local corrosion degree of microarray electrodes. The results showed that HAl77-2 and most of the 316L SS electrode wires in the microarray electrodes served as anodes, while TA2 and the remainder of the 316L SS electrode wires performed as cathodes. When the concentration of Cl<sup>−</sup> increased from 1.9 to 4.3 wt%, the anode potential shifted negatively and the anode current tended to increase. Under a seawater liquid film with a thickness of 200 μm and Cl<sup>−</sup> concentrations of 3.1 and 4.3 wt%, the anodic galvanic current and corrosion driving force of CMEA were relatively high. Under a seawater liquid film with a thickness of 200 μm, the anodic galvanic current, Δ<em>E<sub>max</sub></em>, <em>I<sub>a,</sub></em><sub>max</sub>, and <em>LCII</em> all reached their maximum values at 60 °C. The electrochemical impedance modulus of HAl77-2 under coupled polarization conditions was smaller than that of HAl77-2 under uncoupled conditions, indicating that the polarization effect between the electrodes in the coupled state promoted the corrosion kinetics of HAl77-2.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"171 ","pages":"Article 107863"},"PeriodicalIF":4.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131981","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}
This study investigates the use of a novel composite material, synthesized from melamine, urea, and thiourea derived graphitic carbon nitride (g-C3N4) and copper hexacyanoferrate (CuHCF) by ultrasonication method, for the electrochemical adsorption of 137Cs in wastewater. The adsorption and desorption of Cs+ ions in the CuHCF/g-C3N4 composite can be investigated using cyclic voltammetry by alternating the applied potentials between the anode and cathode. Different g-C3N4 precursors alter the structural and electrochemical properties of the composites, affecting surface area, porosity, electron transfer, and performance in 137Cs adsorption. The novel composite materials demonstrated a significant removal efficiency that calculated to be 46.5 % for pure CuHCF, 50.6 % for CuHCF/g-C3N4-M, 59.8 % for CuHCF/g-C3N4-U, and 52.5 % for CuHCF/g-C3N4-T, utilizing an electrochemical method over 250 cycles. The proposed system was successfully employed to adsorb 137Cs from actual wastewater. This method underscores the potential of the CuHCF/g-C3N4 composite as a promising candidate for the sustainable and effective removal of radioactive 137Cs from contaminated water sources.
{"title":"Electrochemical performance and efficiency of novel copper hexacyanoferrate/graphitic carbon nitride composites for the removal of 137Cs","authors":"Sudarat Issarapanacheewin , Natthaya Siangdee , Poomsith Thangsan , Witsanu Katekaew , Nikom Prasertchiewchan , Wilasinee Kingkam , Kanlayawat Wangkawong","doi":"10.1016/j.elecom.2024.107857","DOIUrl":"10.1016/j.elecom.2024.107857","url":null,"abstract":"<div><div>This study investigates the use of a novel composite material, synthesized from melamine, urea, and thiourea derived graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) and copper hexacyanoferrate (CuHCF) by ultrasonication method, for the electrochemical adsorption of <sup>137</sup>Cs in wastewater. The adsorption and desorption of Cs<sup>+</sup> ions in the CuHCF/g-C<sub>3</sub>N<sub>4</sub> composite can be investigated using cyclic voltammetry by alternating the applied potentials between the anode and cathode. Different g-C<sub>3</sub>N<sub>4</sub> precursors alter the structural and electrochemical properties of the composites, affecting surface area, porosity, electron transfer, and performance in <sup>137</sup>Cs adsorption. The novel composite materials demonstrated a significant removal efficiency that calculated to be 46.5 % for pure CuHCF, 50.6 % for CuHCF/g-C<sub>3</sub>N<sub>4</sub>-M, 59.8 % for CuHCF/g-C<sub>3</sub>N<sub>4</sub>-U, and 52.5 % for CuHCF/g-C<sub>3</sub>N<sub>4</sub>-T, utilizing an electrochemical method over 250 cycles. The proposed system was successfully employed to adsorb <sup>137</sup>Cs from actual wastewater. This method underscores the potential of the CuHCF/g-C<sub>3</sub>N<sub>4</sub> composite as a promising candidate for the sustainable and effective removal of radioactive <sup>137</sup>Cs from contaminated water sources.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"171 ","pages":"Article 107857"},"PeriodicalIF":4.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132052","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}
Pub Date : 2025-01-31DOI: 10.1016/j.elecom.2025.107875
H. Alwael , N.A. Asiri , B.G. Alhogbi , A.S. Alharthi , E.A. Bahaidarah , T.N. Abduljabbar , D.F. Baamer , M. Madkour , F.A. Zainy , M.S. El-Shahawi
The extensive use and misuse of selective serotonin reuptake inhibitors (SSRIs) in drug formulations has resulted in their accumulation in food sources and environment, posing noteworthy threats to human health and the global economy. Dapoxetine hydrochloride (DPH) is one of the recent oral drugs frequently misused for the treatment of male sexual dysfunction of premature ejaculation and has lately international attention. Hence, the current study reports a simple and low cost electrochemical probe based on glassy carbon electrode (GCE) combining adsorptive square wave - anodic stripping voltammeter (Ads SW-ASV) for detection of DPH in aqueous solution at pH 3. The proposed probe displayed limits of detection (LOD) and quantification (LOQ) of 5.0 × 10−7 and 1.56 × 10−6 M, respectively, with a wide linear dynamic range (LDR) of 1.0 × 10−6–1.0 × 10−4 M of DPH. The sensor also revealed remarkable reproducibility, stability, and resistance towards interference. The probe also has favorable LOD and good LDR compared to the recent reported assays for DPH detection. The probe was applied for detection of DPH in its drug formulations and its residues in water samples with acceptable recoveries (98.5 ± 0.014–104 ± 0.016 %) with favorable repeatability and reproducibility. The experimental Student texptest (n = 5) was lower than tabulated t value t (2.78) at 95 % confidence (n = 5) demonstrating the reliability of the probe towards DPH detection in water and signifying the potential practices for DPH detection in complex matrices. Thus, the probe revealed good performance making it a talented candidate for practical detection of DPH. Interference of some frequently found components in drug residues in water and long-term stability of the probe was also assigned. The probe is simple, robust, and able to detect DPH in complex matrix with high recoveries.
{"title":"Probe – Integrated electrochemical sensing platform for detection of trace levels of Dapoxetine hydrochloride drug residue in water and drug formulations","authors":"H. Alwael , N.A. Asiri , B.G. Alhogbi , A.S. Alharthi , E.A. Bahaidarah , T.N. Abduljabbar , D.F. Baamer , M. Madkour , F.A. Zainy , M.S. El-Shahawi","doi":"10.1016/j.elecom.2025.107875","DOIUrl":"10.1016/j.elecom.2025.107875","url":null,"abstract":"<div><div>The extensive use and misuse of selective serotonin reuptake inhibitors (SSRIs) in drug formulations has resulted in their accumulation in food sources and environment, posing noteworthy threats to human health and the global economy. Dapoxetine hydrochloride (DPH) is one of the recent oral drugs frequently misused for the treatment of male sexual dysfunction of premature ejaculation and has lately international attention. Hence, the current study reports a simple and low cost electrochemical probe based on glassy carbon electrode (GCE) combining adsorptive square wave - anodic stripping voltammeter (Ads SW-ASV) for detection of DPH in aqueous solution at pH 3. The proposed probe displayed limits of detection (LOD) and quantification (LOQ) of 5.0 × 10<sup>−7</sup> and 1.56 × 10<sup>−6</sup> M, respectively, with a wide linear dynamic range (LDR) of 1.0 × 10<sup>−6</sup>–1.0 × 10<sup>−4</sup> M of DPH. The sensor also revealed remarkable reproducibility, stability, and resistance towards interference. The probe also has favorable LOD and good LDR compared to the recent reported assays for DPH detection. The probe was applied for detection of DPH in its drug formulations and its residues in water samples with acceptable recoveries (98.5 ± 0.014–104 ± 0.016 %) with favorable repeatability and reproducibility. The experimental <em>Student t</em><sub><em>exp</em></sub> <em>test</em> (<em>n</em> = 5) was lower than tabulated <em>t</em> value <em>t</em> (2.78) at 95 % confidence (n = 5) demonstrating the reliability of the probe towards DPH detection in water and signifying the potential practices for DPH detection in complex matrices. Thus, the probe revealed good performance making it a talented candidate for practical detection of DPH. Interference of some frequently found components in drug residues in water and long-term stability of the probe was also assigned. The probe is simple, robust, and able to detect DPH in complex matrix with high recoveries.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"173 ","pages":"Article 107875"},"PeriodicalIF":4.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136374","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}
Pub Date : 2025-01-31DOI: 10.1016/j.elecom.2025.107881
Savari Prabhu , M. Arulperumjothi , Fikadu Tesgera Tolasa , S. Govardhan
Cycloarenes represent a class of polycyclic aromatic compounds distinguished by their intricate molecular structures, where multiple benzene rings are fused together to form macrocyclic frameworks. These structures enclose cavities, with carbon-hydrogen bonds pointing inward, influenced by the arrangement of benzene units in both angular and linear patterns. The unique geometric and electronic properties of cycloarenes, stemming from their superaromaticity, have garnered significant interest among researchers, leading to the exploration of their magnetic and electrical characteristics. Recently, a breakthrough was achieved with the synthesis of a holey C216 nanographene featuring three strands of benzene rings. This achievement underscores the importance of characterizing the topology of such complex molecules to elucidate their properties accurately. In this study, we investigated holey nanographenes with varying numbers of benzene ring strands, employing calculations to determine topological indices. Additionally, the study evaluated the energetic and spectral properties of these molecules. By providing vital insights into the structural and electrical properties of cycloarenes, these findings have the potential to pave the path for applications across a wide range of scientific areas.
{"title":"Distance and degree based topological characterization, spectral and energetic properties, and 13C NMR signals of holey nanographene","authors":"Savari Prabhu , M. Arulperumjothi , Fikadu Tesgera Tolasa , S. Govardhan","doi":"10.1016/j.elecom.2025.107881","DOIUrl":"10.1016/j.elecom.2025.107881","url":null,"abstract":"<div><div>Cycloarenes represent a class of polycyclic aromatic compounds distinguished by their intricate molecular structures, where multiple benzene rings are fused together to form macrocyclic frameworks. These structures enclose cavities, with carbon-hydrogen bonds pointing inward, influenced by the arrangement of benzene units in both angular and linear patterns. The unique geometric and electronic properties of cycloarenes, stemming from their superaromaticity, have garnered significant interest among researchers, leading to the exploration of their magnetic and electrical characteristics. Recently, a breakthrough was achieved with the synthesis of a holey C<sub>216</sub> nanographene featuring three strands of benzene rings. This achievement underscores the importance of characterizing the topology of such complex molecules to elucidate their properties accurately. In this study, we investigated holey nanographenes with varying numbers of benzene ring strands, employing calculations to determine topological indices. Additionally, the study evaluated the energetic and spectral properties of these molecules. By providing vital insights into the structural and electrical properties of cycloarenes, these findings have the potential to pave the path for applications across a wide range of scientific areas.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"173 ","pages":"Article 107881"},"PeriodicalIF":4.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143301143","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}
As the demand for affordable and safe energy storage options surges, the quest for hybrid ion batteries that effectively combine the strengths of Lithium-Ion Batteries (LIBs) and Sodium-Ion Batteries (SIBs) is gaining momentum. This study introduces an innovative hybrid lithium/sodium ion full battery (HIB), which features a porous hard carbon (PHC) anode and a high-energy sodium-based cathode, Na3V2(PO4)3 (NVP). Upon assembly, these HIBs demonstrate a commendable operating voltage of approximately 3.5 V, alongside a discharge-specific capacity of 92.9 mAh/g. Furthermore, they reveal impressive capabilities in terms of high-rate performance, cycling stability, and reversible capacity. The investigation into the reaction kinetics and the mechanisms behind lithium/sodium insertion and extraction in this hybrid battery was initially conducted through ex-situ XRD and ex-situ XPS analyses. This research opens up new avenues and perspectives for further advancements in hybrid ion battery technology.
{"title":"A li+/Na+ hybrid rechargeable full battery comprising rice husk porous hard carbon anode and sodium vanadium phosphate","authors":"Xiangxiang Chen, Xingchen Pan, Yixin Zhao, Zhiyong Xie","doi":"10.1016/j.elecom.2025.107877","DOIUrl":"10.1016/j.elecom.2025.107877","url":null,"abstract":"<div><div>As the demand for affordable and safe energy storage options surges, the quest for hybrid ion batteries that effectively combine the strengths of Lithium-Ion Batteries (LIBs) and Sodium-Ion Batteries (SIBs) is gaining momentum. This study introduces an innovative hybrid lithium/sodium ion full battery (HIB), which features a porous hard carbon (PHC) anode and a high-energy sodium-based cathode, Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> (NVP). Upon assembly, these HIBs demonstrate a commendable operating voltage of approximately 3.5 V, alongside a discharge-specific capacity of 92.9 mAh/g. Furthermore, they reveal impressive capabilities in terms of high-rate performance, cycling stability, and reversible capacity. The investigation into the reaction kinetics and the mechanisms behind lithium/sodium insertion and extraction in this hybrid battery was initially conducted through ex-situ XRD and ex-situ XPS analyses. This research opens up new avenues and perspectives for further advancements in hybrid ion battery technology.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"172 ","pages":"Article 107877"},"PeriodicalIF":4.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098121","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}
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