Journal of Electroanalytical Chemistry最新文献_第9页

Synergistic coupling of NiCoS nanorods with NiCo-LDH nanosheets towards highly efficient hydrogen evolution reaction in alkaline media NiCoS纳米棒与NiCo-LDH纳米片协同耦合在碱性介质中实现高效析氢反应

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 DOI: 10.1016/j.jelechem.2023.117622

Guanyun Gao , Wensi Wang , Yanling Wang , Ziqi Fu , Lu Liu , Yunmei Du , Zhenjiang Li , Yanru Liu , Lei Wang

{"title":"Synergistic coupling of NiCoS nanorods with NiCo-LDH nanosheets towards highly efficient hydrogen evolution reaction in alkaline media","authors":"Guanyun Gao , Wensi Wang , Yanling Wang , Ziqi Fu , Lu Liu , Yunmei Du , Zhenjiang Li , Yanru Liu , Lei Wang","doi":"10.1016/j.jelechem.2023.117622","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117622","url":null,"abstract":"<div>As the key step in the overall water splitting system, hydrogen evolution reaction (HER) has become one of the main methods of hydrogen production in industrial applications. Here, through the strong coupling between NiCo-LDH nanosheets and NiCoS nanorods, the three-dimensional heterogeneous structure formed by the composite can provide a large catalytic specific surface area. The modification of LDH lamellar will provide abundant edge active sites and enhance its structural stability. The synergistic effect of NiCo-LDH and NiCoS can optimize the electronic structure and promote mass transfer and water cracking. Benefiting from the above points, the NiCoS@NiCo-LDH/NF obtained showed the significant boost in HER process. It only required 99 mV to reach current density of 10 mA·cm−2 and maintained excellent durability for 24 h for HER, which proved NiCoS@NiCo-LDH/NF was a cost-free, high-efficient and outstandingly stable HER catalyst in basic solution.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117622"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3203180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Electrochemical and microscopic characterization of titanium dioxide electrodes modified with platinum nanoparticles 纳米铂修饰二氧化钛电极的电化学和微观表征

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-14 DOI: 10.1016/j.jelechem.2023.117717

Francisco A. Filippin , Mariana I. Rojas , Lucía B. Avalle

{"title":"Electrochemical and microscopic characterization of titanium dioxide electrodes modified with platinum nanoparticles","authors":"Francisco A. Filippin , Mariana I. Rojas , Lucía B. Avalle","doi":"10.1016/j.jelechem.2023.117717","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117717","url":null,"abstract":"<div>This study investigates glass/Ti/Pt/TiO2 surfaces, wherein Pt nanoparticles (NPs) were potentiostatically deposited with an amount of Pt that varies based on deposition time. The size and distribution of NPs were analyzed by scanning electron microscopy (SEM). Subsequently, a thicker titanium dioxide film was grown via anodization. Topography and roughness were examined by atomic force microscopy (AFM). Remarkably, TiO2 grows independently of Pt NPs and remains stable under working conditions, including acid, neutral, and alkaline media. Under steady-state conditions, the open circuit potentials (OCPs) of the modified semiconductor/electrolyte interfaces corresponding to 1, 5, and 10 s of electrodeposited Pt, showed a shift of 167 mV, 42 mV, and 24 mV toward more positive values, respectively. Notably, these surfaces exhibit the activity of a Pt quasi-electrode and the band structure of a titanium dioxide semiconductor, making them ideal for use as photoanodes. In addition, it can be highlighted that the methodology employed in the preparation of the surfaces allows for reproducibility.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"946 ","pages":"Article 117717"},"PeriodicalIF":4.5,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3146951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nano-NiFe LDH assembled on CNTs by electrostatic action as an efficient and durable electrocatalyst for oxygen evolution 纳米nife LDH通过静电作用组装在碳纳米管上，作为一种高效耐用的析氧电催化剂

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-14 DOI: 10.1016/j.jelechem.2023.117718

Simin He, Ruimei Yue, Wentong Liu, Junxia Ding, Xiaolun Zhu, Nijuan Liu, Ruibin Guo, Zunli Mo

引用次数: 1

A label-free photoelectrochemical sensor based on BiVO4@graphene oxide hybrid for analysis of the antioxidant capacity in food 一种基于BiVO4@graphene氧化物杂化物的无标签光电化学传感器，用于分析食品中的抗氧化能力

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-12 DOI: 10.1016/j.jelechem.2023.117713

Fangjie Han , Shulin Luo , Zhifang Wu , Zhishan Liang , Wenxin Yang , Dongxue Han , Zhonghui Sun , Zhenbang Liu , Li Niu

{"title":"A label-free photoelectrochemical sensor based on BiVO4@graphene oxide hybrid for analysis of the antioxidant capacity in food","authors":"Fangjie Han , Shulin Luo , Zhifang Wu , Zhishan Liang , Wenxin Yang , Dongxue Han , Zhonghui Sun , Zhenbang Liu , Li Niu","doi":"10.1016/j.jelechem.2023.117713","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117713","url":null,"abstract":"<div>Antioxidant can protect body from free radical and dietary intake is a major source of antioxidants for human body. Therefore, it is particularly important to evaluate the antioxidant capacity of food and drink in daily diet. Herein, a label-free photoelectrochemical (PEC) sensor based on BiVO4@graphene oxide (GO) hybrid has been developed for antioxidants analysis and applied it to antioxidant capacity detection of real samples. Five representative antioxidants including ascorbic acid (AA), caffeic acid (CA), chlorogenic acid (CHA), fisetin (FT) and quercetin (QT) were determined by this PEC sensor to acquire photocurrent response at different concentrations. This PEC sensor exhibited excellent sensitivity and anti-interference. Furthermore, antioxidant capacity of food samples was assessed utilizing this PEC sensor, indicating the practicability and accuracy of this PEC sensor. This study suggests that BiVO4@GO composites constructed PEC sensor can provide a practical and fast method for detecting antioxidant capacity in the field of food.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"946 ","pages":"Article 117713"},"PeriodicalIF":4.5,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3146197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CuO quantum dots embedded Cu3(BTC)2/CuO sugar gourd-like nanoarrays on copper foil as free-standing anodes for lithium-ion batteries with boosted performance 在铜箔上嵌入Cu3(BTC)2/CuO糖葫芦状纳米阵列的CuO量子点作为锂离子电池的独立阳极，提高了性能

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-12 DOI: 10.1016/j.jelechem.2023.117714

Qinxing Xie , Shoumin Zhang , Weiping Huang , Peng Zhao

引用次数: 1

Facilitated catalytic surface engineering of MnCo2O4 electrocatalyst towards enhanced oxygen evolution reaction 促进了MnCo2O4电催化剂对强化析氧反应的催化表面工程

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-12 DOI: 10.1016/j.jelechem.2023.117716

Abu Talha Aqueel Ahmed , Sankar Sekar , Shubhangi S. Khadtare , Nurul Taufiqu Rochman , Sejoon Lee , Hyungsang Kim , Deuk Young Kim , Hyunsik Im , Abu Saad Ansari

{"title":"Facilitated catalytic surface engineering of MnCo2O4 electrocatalyst towards enhanced oxygen evolution reaction","authors":"Abu Talha Aqueel Ahmed , Sankar Sekar , Shubhangi S. Khadtare , Nurul Taufiqu Rochman , Sejoon Lee , Hyungsang Kim , Deuk Young Kim , Hyunsik Im , Abu Saad Ansari","doi":"10.1016/j.jelechem.2023.117716","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117716","url":null,"abstract":"<div>The overall conversion efficiency of water electrolysis is primarily restricted by the sluggish kinetics of the oxygen evolution reaction (OER). To overcome the OER bottleneck, fundamental scientific attention is keenly directed toward the development of durable, cost-effective, and highly efficient catalysts, and therefore, the focus of current research. Herein, we report the facile fabrication of promising noble–metal–free oxygen defects engineered MnCo2O4 (Od-MnCo2O4) catalyst as a highly efficient OER water electrocatalyst in an alkaline KOH medium. The MnCo2O4 nanosheet is directly grown on the nickel foam and dramatically changes to a crumpled sphere after NaBH4 treatment, which results in increased oxygen defects (Od). The engineered Od in MnCo2O4 might modify their electronic structure effectively, which results in improved electrical conductivity and a large quantity of electrochemically accessible active surface area. The Od-MnCo2O4 catalyst demonstrates an outstanding OER activity and exhibits a small overpotential of 250 and 316 mV at a current density of 10 and 100 mA cm−2, respectively, with a modest Tafel slope of 64 mV dec–1. The Od-MnCo2O4 catalyst also demonstrates excellent perseverance till 60 h upon continuous chronopotentiometric test even at 100 mA cm−2 and further reveals a static potential response at low and high rates. The excellent OER performance is ascribed to enhanced electrochemically active sites and improved electronic conductivity aroused from the NaBH4 reduction.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"946 ","pages":"Article 117716"},"PeriodicalIF":4.5,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3208719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of electrochemical and spectroelectrochemical properties of some amino-substituted naphthoquinones (NQs) 几种氨基取代萘醌的电化学和光谱电化学性质研究

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-12 DOI: 10.1016/j.jelechem.2023.117715

Zeynep Ozyildiz , Dilan Gezer , Nahide Gulsah Deniz , Zeliha Gokmen , Özlem Uğuz Neli , Atıf Koca

{"title":"Investigation of electrochemical and spectroelectrochemical properties of some amino-substituted naphthoquinones (NQs)","authors":"Zeynep Ozyildiz , Dilan Gezer , Nahide Gulsah Deniz , Zeliha Gokmen , Özlem Uğuz Neli , Atıf Koca","doi":"10.1016/j.jelechem.2023.117715","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117715","url":null,"abstract":"<div>The class of quinone compounds are excellent representatives of biologically redox-active compounds. Electron transfers such as in quinone compounds play important roles in the bioactivation of redox-active drugs, in their metabolism/catabolism, and targeted release at precise destinations and frequently promote their ligand–targetinteractions.Owing to the enthralling synthetic importance and pharmacological applications of 1,4-naphthoquinone derivatives, our interest is turned into a detailed electro- and photoelectrochemistry study of these pharmacophoric structures. Firstly, amino(substituted)-1,4-naphthoquinone (NQ) derivatives (2a-b, 3, 4a-b, 5, 6, 7, 8 and 9) were synthesized according to Michael addition mechanism. The exact structures of compounds were elucidated by spectroscopic methods such as FT-IR, 1H-/13C NMR, MS and microanalysis. Secondly, the electrochemical behaviors of NQ derivatives are determined with voltammetric and in situ UV–Vis spectroelectrochemical measurements. All synthesized NQ derivatives illustrate two reductions and one oxidation processes. Voltammetric analyses of the couples of the molecules indicate electrochemical reversibility of the reductions and electrochemical irreversibility of the oxidation couples. Substituent environments of NQ structure considerably influence the chemical reversibility of the redox processes.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"946 ","pages":"Article 117715"},"PeriodicalIF":4.5,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2308957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MOF particles (UiO-66 and UiO-66(Ce))/cellulose nanocomposite separators with regulating ion transport controllably for lithium battery 锂电池用可调控离子传输的MOF颗粒(UiO-66和UiO-66(Ce))/纤维素纳米复合材料隔膜

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-11 DOI: 10.1016/j.jelechem.2023.117708

Jiajin Zhang , Zixuan Zhang , Tong Wu , Xiaogang Luo

{"title":"MOF particles (UiO-66 and UiO-66(Ce))/cellulose nanocomposite separators with regulating ion transport controllably for lithium battery","authors":"Jiajin Zhang , Zixuan Zhang , Tong Wu , Xiaogang Luo","doi":"10.1016/j.jelechem.2023.117708","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117708","url":null,"abstract":"<div>Commercial separators result in poor lithium battery performance due to low electrolyte wettability and non-selective ion transport. In this work, the cellulose membrane with excellent electrolyte wettability was selected as the skeleton, and the MOF nanoparticles were added by the blending method. The composite cellulose membrane with uniform pore size was prepared by casting process. The cellulose membrane skeleton promoted the absorption of electrolytes. The Lewis acid sites presented in UiO-66 facilitated the dissociation of lithium salts by attracting PF6− anions. The OMS (open metal site) provided by UiO-66(Ce) further adsorbs anions and solvent molecules, effectively regulated ion transport, maintained a stable and efficient cycle life, and reduced lithium dendrite deposition. The LiFePO4/Li equipped with UiO-66/CM showed a capacity retention rate of 71.70%, while the LiFePO4/Li equipped with UiO-66 (Ce)/CM showed a capacity retention rate of 93.80 % after 200 cycles at 0.5C. Therefore, the developed strategy may provide a powerful way to improve electrolyte wettability and effectively regulate ion transport.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"946 ","pages":"Article 117708"},"PeriodicalIF":4.5,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3037478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quenching-assisted surface functionalization of metal oxide for highly enhanced electrocatalytic urea oxidation 高强度电催化尿素氧化用金属氧化物的淬火辅助表面功能化

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-11 DOI: 10.1016/j.jelechem.2023.117706

Lei Chen , Wen-Da Zhang , Jingguo Yang , Jiangyong Liu , Zhi-Guo Gu , Xiaodong Yan

{"title":"Quenching-assisted surface functionalization of metal oxide for highly enhanced electrocatalytic urea oxidation","authors":"Lei Chen , Wen-Da Zhang , Jingguo Yang , Jiangyong Liu , Zhi-Guo Gu , Xiaodong Yan","doi":"10.1016/j.jelechem.2023.117706","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117706","url":null,"abstract":"<div>Urea oxidation reaction (UOR) is considered as a good substitute for oxygen evolution reaction (OER) because of its low theoretical onset potential. Surface modification is an effective strategy to tune the catalytic activity of the catalysts towards UOR. Here, we developed a facile and universal quenching strategy to prepare sulfate-modified NiO nanosheets (NiO@NF-20S). Compared with the pristine NiO nanosheets, the electrocatalytic performance of the NiO@NF-20S is greatly improved, showing a small potential of 1.40 V vs. RHE to deliver a current density of 200 mA cm−2 as well as robust electrochemical stability. The outstanding electrocatalytic performance of the NiO@NF-20S is mainly ascribed to the improved surface wettability and the promoted Ni2+/Ni3+ redox reaction. The quenching strategy can be expanded to not only various kinds of functional groups from nitric acid and phosphoric acid but also other metal oxides such as NiCoOx and NiCrOx. This work provides a new avenue to the design of surface-functionalized metal oxide catalysts for electrocatalysis.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"946 ","pages":"Article 117706"},"PeriodicalIF":4.5,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2907083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of charging dynamics in electrochemical systems with a graphene electrode 石墨烯电极电化学系统的充电动力学建模

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-10 DOI: 10.1016/j.jelechem.2023.117711

Mahdi Yavarian , Roderick Melnik , Z.L. Mišković

引用次数: 0