Electrochemistry Communications最新文献_第4页

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

IF 4.7 3区工程技术

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

{"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

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

{"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

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

Jianling Huang , Jiabao Li , Yang Cai , Shiqian Zhao

{"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

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

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

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

{"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

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

{"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

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

Andualem Ejigu , Molla Tefera , Atnafu Guadie

引用次数: 0

Investigation of the modification of gold electrodes by electrochemical molecularly imprinted polymers as a selective layer for the trace level electroanalysis of PAH 将电化学分子印迹聚合物修饰金电极作为多环芳烃痕量电分析选择层的研究

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2024-11-12 DOI: 10.1016/j.elecom.2024.107837

Farah Ibrahim , Alexandre Sala , Armand Fahs , Aoife Morrin , Clément Nanteuil , Guillaume Laffite , Ian A. Nicholls , Fiona Regan , Hugues Brisset , Catherine Branger

{"title":"Investigation of the modification of gold electrodes by electrochemical molecularly imprinted polymers as a selective layer for the trace level electroanalysis of PAH","authors":"Farah Ibrahim , Alexandre Sala , Armand Fahs , Aoife Morrin , Clément Nanteuil , Guillaume Laffite , Ian A. Nicholls , Fiona Regan , Hugues Brisset , Catherine Branger","doi":"10.1016/j.elecom.2024.107837","DOIUrl":"10.1016/j.elecom.2024.107837","url":null,"abstract":"<div><div>Electrochemical molecularly imprinted polymers (e-MIPs) were grafted for the first time as a thin layer to the surface of a gold electrode to perform trace level electroanalysis of benzo(a)pyrene (BaP). This was achieved by controlled/living radical photopolymerization of a redox tracer monomer (ferrocenylmethyl methacrylate, FcMMA) with ethylene glycol dimethacrylate in the presence of benzo(a)pyrene as the template molecule. For that purpose, a novel photoiniferter-derived SAM was first deposited on the gold surface. The SAM formation was monitored by cyclic voltammetry and electrochemical impedance spectroscopy. Then, the “grafting from” of the e-MIP was achieved upon photoirradiation during a controlled time. Differential pulse voltammetry was used to quantify BaP in aqueous solution by following the modification of the signal of FcMMA. A limit of detection of 0.19 nM in water and a linear range of 0.66 nM to 4.30 nM, were determined, thus validating the enhancement of sensitivity induced by the close contact between the e-MIP and the electrode, and the improved transfer electron.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"169 ","pages":"Article 107837"},"PeriodicalIF":4.7,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660827","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 solvothermal synthesis of free-binder NiCo2S4/nickel foam electrode for supercapacitor application: Effects of CTAB surfactant 用于超级电容器的自由粘合剂 NiCo2S4/ 镍泡沫电极的原位溶热合成：CTAB 表面活性剂的影响

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2024-11-12 DOI: 10.1016/j.elecom.2024.107838

A.R. Sarbishei, S.M. Masoudpanah, M. Hasheminiasari, S.A. Sanei

引用次数: 0

Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coating 水热反应过程中泡沫镍电极的腐蚀：简单碳黑保护层的影响

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2024-11-10 DOI: 10.1016/j.elecom.2024.107835

Gillian Collins , Tara N. Barwa , Luke Glennon , P. Rupa Kasturi , Carmel B. Breslin

{"title":"Corrosion of nickel foam electrodes during hydrothermal reactions: The influence of a simple protective carbon black coating","authors":"Gillian Collins , Tara N. Barwa , Luke Glennon , P. Rupa Kasturi , Carmel B. Breslin","doi":"10.1016/j.elecom.2024.107835","DOIUrl":"10.1016/j.elecom.2024.107835","url":null,"abstract":"<div><div>Nickel foam (NF) substrates are widely used to support electrocatalysts, and this is frequently achieved using hydrothermal reactions, where the NF is immersed in the hydrothermal reactor together with the electrocatalyst precursors. However, other reactions including the corrosion of the NF and changes to the pH occur simultaneously, and these can affect the quality of the final electrocatalyst. Herein, a simple approach is devised to minimise these unwanted reactions. Carbon black (CB) was non-covalently functionalised at room temperature using tannic acid to give very stable and good dispersions of fCB in deionised water. Using a simple sonication step, the NF was coated with a uniform layer of the dispersed fCB. This layer served to minimise the corrosion of the underlying NF during the hydrothermal reactions with very good protection observed up to a temperature of 160 °C in deionised water at a pH of 2.0. The corrosion currents of the NF and fCB@NF were estimated at 8.7 µA and 3.9 µA, respectively, at room temperature in this acidic solution. Using a model reaction, the successful nucleation and growth of MnCo<sub>2</sub>O<sub>4</sub> cubes was observed at fCB@NF, but not at the corroding NF.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"169 ","pages":"Article 107835"},"PeriodicalIF":4.7,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660712","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