Current Opinion in Electrochemistry最新文献_第8页

Electrochemically-driven enzyme cascades: Recent developments in design, control, and modelling 电化学驱动的酶级联：设计、控制和建模方面的最新进展

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-28 DOI: 10.1016/j.coelec.2024.101565

Bhavin Siritanaratkul , Clare F. Megarity

{"title":"Electrochemically-driven enzyme cascades: Recent developments in design, control, and modelling","authors":"Bhavin Siritanaratkul , Clare F. Megarity","doi":"10.1016/j.coelec.2024.101565","DOIUrl":"10.1016/j.coelec.2024.101565","url":null,"abstract":"<div><p>The study of single redox enzymes by electrochemistry is well-established, using both mediated and direct electron exchange between the enzyme and electrode. Moving beyond single enzymes, electrochemically driven multienzyme cascades can achieve more complex transformations, and in this review, we highlight recent advances. Electrochemical control of multiple enzymes is discussed, with examples including, electrode surface modification and engineering of the enzymes to facilitate direct electron exchange with the electrode, and new developments made by the entrapment of enzymes in a highly porous electrode called the electrochemical leaf. Examples that harness the power of direct control of the potential and the ability to monitor cascade activity as electrical current, include synthesis, deracemization, and measurement of drug binding kinetics. Redox cofactors (e.g. NADP(H)) can be electrochemically regenerated by a variety of enzymes, but non-redox cofactors are less amenable to electrochemical regeneration, and we highlight enzyme cascades for adenosine triphosphate (ATP) regeneration designed with an electrochemical step to generate the required phosphate donor. Finally, we cover approaches to model electrochemically driven cascades, which predicted local environments (e.g. pH) that are difficult to measure directly and yielded guidelines for the rational design of immobilized enzyme cascade electrodes.</p></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"47 ","pages":"Article 101565"},"PeriodicalIF":7.9,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451910324001261/pdfft?md5=d9a515cb503107eaf0552af69b60b10f&pid=1-s2.0-S2451910324001261-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141717334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","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 SPM studies of electrochemical interfaces in high ionic strength electrolytes 高离子强度电解质中电化学界面的原位 SPM 研究

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-26 DOI: 10.1016/j.coelec.2024.101563

Xiao-Ting Yin, Wei-Wei Wang, Zhuo Tan, Yu Ding, Bing-Wei Mao, Jia-Wei Yan

引用次数: 0

Elucidating the structure–activity relationship on single entities by scanning electrochemical cell microscopy 利用扫描电化学细胞显微镜阐明单个实体的结构与活性关系

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-26 DOI: 10.1016/j.coelec.2024.101561

Yanqi Zou, Qianjin Chen

引用次数: 0

Current understanding of electrochemical strain microscopy to visualize ion behavior on the nanoscale 目前对电化学应变显微镜在纳米尺度上观察离子行为的理解

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-26 DOI: 10.1016/j.coelec.2024.101562

Florian Hausen , Nina Balke

{"title":"Current understanding of electrochemical strain microscopy to visualize ion behavior on the nanoscale","authors":"Florian Hausen , Nina Balke","doi":"10.1016/j.coelec.2024.101562","DOIUrl":"https://doi.org/10.1016/j.coelec.2024.101562","url":null,"abstract":"<div><p>Electrochemical Strain Microscopy (ESM) is a technique based on Atomic Force Microscopy and provides information about local ionic processes through electro-chemo-mechanical coupling. It is employed foremost in studying battery materials, from cathodes, and anodes to solid-state electrolytes. Based on this overlap we aim to connect the electrochemistry community further with those employing ESM, by providing the current understanding of ESM, starting with a thorough introduction to the technique. In the second section, typical applications and challenges identified in recent years are reviewed while in the third chapter new approaches to overcome these issues are presented. This includes the identification of various contributions to the ESM signal, the integration of ESM as part of a multi-modal characterization approach, and importantly, how to link local ESM results to the overall cell performance in batteries. Lastly, upcoming trends and new aspects are discussed, including the application of <em>in-situ</em> ESM directly in an electrochemical environment.</p></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"47 ","pages":"Article 101562"},"PeriodicalIF":7.9,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451910324001236/pdfft?md5=4a585c161667b736a2772c218be24df7&pid=1-s2.0-S2451910324001236-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141605973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Challenges in the selective electrochemical oxidation of methane: Too early to surrender 甲烷选择性电化学氧化的挑战：投降为时尚早

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-20 DOI: 10.1016/j.coelec.2024.101558

引用次数: 0

Advanced design of electrospun nanofiber cathode catalyst layers for PEM fuel cells at low humidity 用于低湿度 PEM 燃料电池的电纺纳米纤维阴极催化剂层的先进设计

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-20 DOI: 10.1016/j.coelec.2024.101559

Valentina Kallina, Frédéric Hasché, Mehtap Oezaslan

引用次数: 0

Operando interpretation of reaction mechanisms and local phenomena on OER catalysts in seawater electrolysis 海水电解中 OER 催化剂上反应机制和局部现象的 Operando 解释

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-20 DOI: 10.1016/j.coelec.2024.101560

Ahyoun Lim, Kahyun Ham, Sayed Elrefaei, Ioannis Spanos

{"title":"Operando interpretation of reaction mechanisms and local phenomena on OER catalysts in seawater electrolysis","authors":"Ahyoun Lim, Kahyun Ham, Sayed Elrefaei, Ioannis Spanos","doi":"10.1016/j.coelec.2024.101560","DOIUrl":"10.1016/j.coelec.2024.101560","url":null,"abstract":"<div><p>Direct seawater splitting has great potential for constructing an economic hydrogen production system and resolving water scarcity via pure water production from evolved hydrogen. However, transforming electrocatalytic direct seawater splitting into a viable process is extremely challenging from an electrocatalytic point of view. A vast number of present ions and impurities in seawater, e.g. Na<sup>+</sup>, Mg<sup>2+</sup>, Cl<sup>−</sup>, SO4<sup>2−</sup>, Br<sup>−</sup>, disrupts efficient oxygen evolution reaction (OER) in anode or hydrogen evolution reaction in cathode. In this respect, there are different challenges posing on understanding the effect of the complex nature of seawater especially on the OER catalysts of seawater electrolysis. This mini-review covers different electrochemical and <em>operando</em> techniques used in order to understand the effect of ions present in seawater on activity, stability, and the equally important reaction selectivity of OER electrocatalysts.</p></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"47 ","pages":"Article 101560"},"PeriodicalIF":7.9,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451910324001212/pdfft?md5=76698d8d438b82c860751b6b158fdfa3&pid=1-s2.0-S2451910324001212-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent developments on MXene-based Zn-ion flexible supercapacitors 基于 MXene 的锌离子柔性超级电容器的最新进展

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-15 DOI: 10.1016/j.coelec.2024.101557

Sreeram Shruti , Madeshwaran Mohanraj , S.T. Senthilkumar , Mani Ulaganathan

{"title":"Recent developments on MXene-based Zn-ion flexible supercapacitors","authors":"Sreeram Shruti , Madeshwaran Mohanraj , S.T. Senthilkumar , Mani Ulaganathan","doi":"10.1016/j.coelec.2024.101557","DOIUrl":"10.1016/j.coelec.2024.101557","url":null,"abstract":"<div><p>MXenes are a new class of two-dimensional layered structure materials that have caught attention of researchers recently. The unique feature of such a layered structure is that it can help in the easy access of electrolyte ions and offers more redox active sites, making MXenes a highly suitable electrode material for electrochemical energy storage applications, which are therefore extensively investigated in supercapacitor applications. However, for specific flexible applications, making a highly efficient flexible energy storage device with exceptional power, energy, and cycle life performance is crucial. To have high specific energy, Zn-ion-based flexible charge storage devices have been studied where MXene plays a significant role as an electrode material. However, making a flexible device with good mechanical stability along with reliable electrochemical performances is challenging. Therefore, MXene is preferred as an active material as individual, composite, and flexible film electrodes due to their high electrochemical accessibility and mechanical and electrochemical stability. Thus, this review discusses the recent developments of MXene-based Zn-ion FSC and highlights their potential for producing state-of-the-art technologies. It also discusses significant challenges and future perspectives of MXene to encourage further research and development in this area.</p></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"47 ","pages":"Article 101557"},"PeriodicalIF":7.9,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141394454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Recent advancement in electrolyte optimization for rechargeable aqueous zinc–sulfur (Zn–S) batteries 可充电锌硫 (Zn-S) 水电池电解质优化的最新进展

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-14 DOI: 10.1016/j.coelec.2024.101555

Liting Chen , Xiaoqing Liu , Yongchao Tang , Zhipeng Wen , Cheng Chao Li

引用次数: 0

Do multiheme cytochromes containing close-packed heme groups have a band structure formed from the heme π and π∗ orbitals? 含有紧密堆积血红素基团的多血红素细胞色素是否具有由血红素 π 和 π* 轨道形成的带状结构？

IF 7.9 2区化学

Current Opinion in Electrochemistry Pub Date : 2024-06-12 DOI: 10.1016/j.coelec.2024.101556

Jessica H. van Wonderen , Alejandro Morales-Florez , Thomas A. Clarke , Andrew J. Gates , Jochen Blumberger , Zdenek Futera , David J. Richardson , Julea N. Butt , Geoffrey R. Moore

{"title":"Do multiheme cytochromes containing close-packed heme groups have a band structure formed from the heme π and π∗ orbitals?","authors":"Jessica H. van Wonderen , Alejandro Morales-Florez , Thomas A. Clarke , Andrew J. Gates , Jochen Blumberger , Zdenek Futera , David J. Richardson , Julea N. Butt , Geoffrey R. Moore","doi":"10.1016/j.coelec.2024.101556","DOIUrl":"10.1016/j.coelec.2024.101556","url":null,"abstract":"<div><p>Multiheme cytochromes (MHCs) are bacterial electron-transfer proteins. We show from optical spectra and calculations that some of these cytochromes probably contain occupied and unoccupied bands formed from heme π and π∗ orbitals that span the protein. In the fully oxidised proteins, the unoccupied π∗-bands are energetically above the redox-active frontier orbitals, which according to NMR data and calculations, are formed of Fe<sup>3+</sup> t<sub>2g</sub> and porphyrin π-orbitals. These orbitals on different hemes are electronically coupled according to EPR data and calculations, but only weakly so. We suggest a role for the heme bands in the electronic conductivity of single MHCs in bioelectronic junctions that is distinct from the role of the redox-active Fe<sup>3+</sup> t<sub>2g</sub> and porphyrin π-orbitals in physiological electron transfer.</p></div>","PeriodicalId":11028,"journal":{"name":"Current Opinion in Electrochemistry","volume":"47 ","pages":"Article 101556"},"PeriodicalIF":7.9,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2451910324001170/pdfft?md5=daef8c57ac2ad3b11736777dabf4986c&pid=1-s2.0-S2451910324001170-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141401142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0