ChemElectroChem最新文献

{"title":"Electrochemical Oxidation of Aryl Boronic Acids via Fluoride Activation and Alternating Polarity Electrolysis for Aryl C–P Bond Formation","authors":"Enqi Feng,&nbsp;Ian Vanswearingen,&nbsp;Maxime Boudjelel,&nbsp;Lise Fabre,&nbsp;Rossul Aldhufari,&nbsp;Christian A. Malapit","doi":"10.1002/celc.202500363","DOIUrl":"https://doi.org/10.1002/celc.202500363","url":null,"abstract":"<p>Aryl organoboron reagents play an important role in modern organic synthesis, and interest in radical-based coupling reactions from these precursors has grown rapidly. However, direct electrochemical generation of aryl radicals from aryl boronic acids, ArB(OH)₂, remains understudied due to their high oxidation potentials (<i>E</i>_ox &gt; 2 V vs. Fc/Fc⁺) and challenges associated with electrochemical processes such as electrode passivation. Aryl potassium trifluoroborate salts (ArBF₃K) can be oxidized efficiently to aryl radicals is previously reported using alternating polarity electrolysis. Building on this, it is combined alternating polarity electrosynthesis with in situ fluoride activation to generate redox-active aryl fluoroborate intermediates, ArBF(OH)₂ and/or ArBF₂(OH), which have significantly lower oxidation potentials than their parent boronic acids or trifluoroborates. Moreover, it is found that for highly electron deficient aryl boronic acids with oxidation potentials higher than 1.7 V versus Fc/Fc⁺, a different mechanism is proposed where aryl boronic acids underwent <i>ipso</i>-substitution with oxidatively generated P(OEt)₃ radical cation. Overall, this dual mechanistic pathway allows an efficient radical-based functionalization of a broad range of aryl boronic acids to form aryl C<span></span>P bonds.</p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500363","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145601163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical Long-Term Stability of a Choline Chloride-Based Deep Eutectic Solvent for Silver Recycling","authors":"Ángel Fernández-Blanco,&nbsp;Benjamin Rotonnelli,&nbsp;Sophie Legeai,&nbsp;Hervé Fontaine,&nbsp;Emmanuel Billy,&nbsp;Romain Duwald","doi":"10.1002/celc.202500325","DOIUrl":"https://doi.org/10.1002/celc.202500325","url":null,"abstract":"<p>Deep eutectic solvents (DES) are investigated since 20 years as ionic liquids alternative for electrochemical applications due to their reduced toxicity and cost. Metal electrowinning, is a process which is especially attractive for DES, since it allows the replacement the polluting state-of-the-art hydrometallurgical routes. Though, the solvent interest is conditioned to the DES long term stability under operating conditions. In this article experimental proofs of the long term stability of Propeline 1:3 both in storage and under electrochemical operation conditions, is provided using silver electroleaching- electrodeposition process as a model electrochemical system for the DES aging study. The solvent long term stability is evaluated during prolonged storage without electrochemical stress, providing a baseline for long-term usability. The electrochemical stability window of Propeline 1:3 is then determined, and its electrochemical degradation is forced for days in order 1) to identify degradation products and 2) to understand degradation mechanism that DES can encounter during extreme operating conditions. Finally, Propeline 1:3 long-term stability under operation conditions is evaluated using different electroleaching-electrodeposition current densities by the monitoring of degradation product formation. The impact of DES aging on the performances of silver electrowinning is assessed through a comparative analysis of fresh and aged electrolyte.</p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500325","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145601164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emergence of Electroanalytical Techniques for Arsenic Detection in Water: Recent Trends and Future Perspectives","authors":"Abhijnan Bhat,&nbsp;Akhilesh Kumar Gupta,&nbsp;Christine O'Connor,&nbsp;Furong Tian,&nbsp;Baljit Singh","doi":"10.1002/celc.202500259","DOIUrl":"https://doi.org/10.1002/celc.202500259","url":null,"abstract":"<p>Arsenic contamination in drinking water remains a critical global health concern, with inorganic arsenic species like arsenite (As(III)) and arsenate (As(V)) posing severe toxicity risks, including carcinogenic and systemic health effects. Recognized as a Group 1 carcinogen by the International Agency for Research on Cancer, arsenic necessitates stringent monitoring to comply with the World Health Organization's (WHO) permissible limit of 10 ppb. Traditional analytical methods such as atomic absorption spectroscopy (AAS) and inductively coupled plasma-mass spectrometry (ICP-MS) provide high precision but are constrained by high costs, operational complexity, and lack of portability, thereby limiting their accessibility in resource-constrained and out-of-laboratory settings. Previous work by the authors explored the methods of arsenic detection and determination by covering most of the analytical methods and techniques, including various sensors and biosensor advancements. This review delves into the progress made predominantly over the last two decades in electroanalytical detection methodologies, which have gained momentum due to their rapid response time, high sensitivity, and adaptability for portable and cost-effective sensing platforms. Unlike most of the material-focused articles, this review presents recent advances in arsenic detection using various electroanalytical techniques—stripping voltammetry, pulse voltammetry, sweep voltammetry, combined voltammetry approaches, amperometry, and electrochemical impedance spectroscopy. The review covers necessary fundamentals of electroanalytical techniques, recent advancements, and emerging trends in arsenic sensor development. The review further explores the portable and onsite electrochemical arsenic sensors, followed by the main challenges and future outlook in this space. The integration of nanomaterials, screen-printed electrodes, and microfluidic devices has significantly improved the detection capabilities. However, standardization, reliability, scalability, speciation, and seamless data integration remain pressing challenges. Smartphone-integrated electrochemical sensors and AI-driven data analytics have the capabilities to foster real-time and onsite arsenic detection with enhanced performance. By leveraging sustainable materials innovations, miniaturized electrochemical platforms, and smart data handling approaches, next-generation arsenic sensors hold promise for ensuring safe drinking water in vulnerable and remote communities worldwide.</p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500259","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145601165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microwave Engineering of Manganese-Rich Layered-Spinel Cathode Materials for Enhanced Lithium-Ion Battery Performance","authors":"Tebogo Tsekeli,&nbsp;Aderemi Bashiru Haruna,&nbsp;Kenneth Ikechukwu Ozoemena","doi":"10.1002/celc.202500331","DOIUrl":"https://doi.org/10.1002/celc.202500331","url":null,"abstract":"<p>Layered oxides such as the Mn-rich lithium nickel manganese cobalt oxides are promising next-generation lithium-ion battery cathode materials owing to the abundance and environmental benignity of Mn. However, the first-cycle irreversibility loss and voltage decay remain key drawbacks that need to be addressed urgently. Herein, rational microwave irradiation is used to induce in situ generation of spinel phase in the bulk of a LiMn_0.662Ni_0.173Co_0.165O₂ material. The layered-spinel heterostructured cathode material delivers excellent cycling stability, with a continuous increase in discharge capacity until the 80th cycle at 0.1 C, thereafter showing a capacity decay of 12.9% when further cycled for 70 cycles, while also displaying suppressed voltage decay 4.11 mV cycle⁻¹ throughout these 150 cycles. Electrochemical impedance spectroscopy studies also show improved lithium diffusion kinetics. To establish the underlying science behind the impact of microwave irradiation, several characterization techniques attribute the observed excellent performance to i) lattice expansion, ii) suppressed Li⁺/Ni²⁺ cation mixing, iii) fine-tuned morphology, iv) increased average manganese oxidation state, and v) increased lattice oxygen in the material. This work showcases the potential of microwave-assisted synthesis methods in designing cathode materials with tuned physico-chemical properties, and thus improved electrochemistry.</p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500331","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145601123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Front Cover: Artificial Enzymatic Electrochemistry (ChemElectroChem 21/2025)","authors":"Nya E. Black,&nbsp;Dara Cheng,&nbsp;Brandon P. Grasty,&nbsp;Dylan G. Boucher","doi":"10.1002/celc.70099","DOIUrl":"https://doi.org/10.1002/celc.70099","url":null,"abstract":"<p>This cover artwork depicts bioelectrocatalytic hydrogen evolution reaction by an artificial enzyme at an electrode surface. Artificial enzymatic electrochemistry is an emerging strategy to achieve desirable reactivity by coupling the expanded catalytic capabilities of artificial enzymes with the control of electrochemical approaches. This comprehensive review discusses promising artificial enzymes for reactions including HER, CO₂RR, and OER and highlights future directions in the field of artificial enzymatic electrochemistry. Fundamentals of bioelectrochemistry are discussed to allow others to integrate these techniques into their own research. More information can be found in the Review Article by Dylan G. Boucher and co-workers (10.1002/celc.202500287).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 21","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70099","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145429402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Positioning Cu in Templated Porous Ag for Active and Selective Electroreduction to C2+ Products","authors":"Maaike E. T. Vink-van Ittersum,&nbsp;Matt L. J. Peerlings,&nbsp;Naud M. T. van de Ven,&nbsp;Thom J. E. Heijnen,&nbsp;Peter Ngene,&nbsp;Petra E. de Jongh","doi":"10.1002/celc.202500170","DOIUrl":"https://doi.org/10.1002/celc.202500170","url":null,"abstract":"<p>Combining Cu with CO-producing Ag is a promising strategy to improve the selectivity of a CO₂ reduction catalyst. However, the influence of the spatial distribution of the two metals is challenging to investigate. A synthesis route to deposit Cu either on top of a templated porous Ag electrode using sputter coating or inside the porous Ag structure using electrodeposition is presented. The Cu location is confirmed using advanced microscopy images, showing that for the electrodes with electrodeposited Cu, the interfacial area between Cu and Ag is higher. Catalytic testing demonstrates increased C₂₊ production, a lower H₂ selectivity, and higher ethanol-to-ethylene ratio for all bimetallic electrodes than for monometallic Cu or Ag catalysts. This is possibly due to CO spillover from Ag to Cu, electronic interaction between the two metals, or a higher local pH inside the Ag pores. Despite a significant loss of Cu, a high production of ethylene and ethanol is maintained over 6 h of electrolysis. Thus, engineering porous bimetallic electrodes provides an effective strategy to improve the ethylene and ethanol activity and selectivity of Cu-based catalysts.</p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500170","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145601030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Weaving New Smart Objects: Actuation and Sensing at a Single Electroactive Interface","authors":"Federica Mariani,&nbsp;Thomas Quast,&nbsp;Wolfgang Schuhmann,&nbsp;Isacco Gualandi,&nbsp;Erika Scavetta","doi":"10.1002/celc.202500263","DOIUrl":"https://doi.org/10.1002/celc.202500263","url":null,"abstract":"<p>The peculiar properties of electroactive polymers mark them as protagonists in the bioelectronic research field, with application in point-of-care devices, wearable electronics, neuroscience, cell biology, and more. They have been successfully employed for the design of both sensing and actuating interfaces, which exert complementary functions but benefit from common electrochemical mechanisms unique to these materials. The question is: to what extent sensing and actuating capabilities can be integrated within a single electrochemical transducer? The simultaneous pH detection and pH-controlled release of a model dye are investigated using screen-printed textiles for wearable applications. The transducer is based on poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) and is specifically functionalized to create a two-terminal pH sensor and subsequently loaded with the anionic dye. Simultaneous pH sensing and controlled dye release into the electrolytic solution are demonstrated via electrical and spectrophotometric techniques, while the local release of the dye is confirmed through scanning electrochemical microscopy. The findings confirm that the acquisition of a quantitative analytical signal and the release of the dye do not interfere with each other and can take place simultaneously at the same electrochemical interface. This opens new perspectives for the development of hybrid sensing and drug delivery systems.</p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500263","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145601028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Partially Exfoliated and Oxidized V2CTx MXene as a Beneficial Support for the Oxygen Evolution Reaction","authors":"Bastian Schmiedecke,&nbsp;Bing Wu,&nbsp;Thorsten Schultz,&nbsp;Norbert Koch,&nbsp;Zdenek Sofer,&nbsp;Michelle P. Browne","doi":"10.1002/celc.202500220","DOIUrl":"https://doi.org/10.1002/celc.202500220","url":null,"abstract":"<p>The oxygen evolution reaction (OER) is a critical bottleneck in water-splitting technologies. Hence, developing efficient and stable OER electrocatalysts is one of the key parameters to improve this technology. Recently, MXenes such as Ti₃C₂T_<i>x</i> and V₂CT_<i>x</i> have shown promise as OER-enhancing additives when combined with transition metal oxides. However, MXene synthesis requires energy-intensive processes, and the materials are prone to oxidation in various environments, such as air, or during electrochemical reactions. While this oxidation is typically considered detrimental, this study investigates whether partially exfoliated and oxidized V₂CT_<i>x</i> can maintain or even enhance OER performance, potentially simplifying the synthesis requirements for V₂CT_<i>x</i>. In this study, V₂CT_<i>x</i> is intentionally oxidized and incorporated into CuCo-based composites at various loadings. X-ray diffraction and X-ray photoelectron spectroscopy confirm the presence of vanadium oxide species in the partially exfoliated and oxidized V₂CT_<i>x</i>. The electrochemical investigations reveal that the partially exfoliated and oxidized V₂CT_<i>x</i> enhances the OER performance compared to fresh V₂CT_<i>x</i>. These findings suggest that, unlike Ti₃C₂T_x, partially exfoliated and oxidized V₂CT_<i>x</i> retains its functionality in OER catalysis and even outperforms its fresh counterpart, providing a more accessible and efficient platform for water-splitting applications.</p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500220","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145601027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-Step Synthesized Al/Mg Codoped LiNi0.9Mn0.1O2 Cathodes with Enhanced Structural and Electrochemical Stability for Lithium-Ion Batteries","authors":"Lang Wen,&nbsp;Liang Shan,&nbsp;Lang Xu,&nbsp;Yunhan Hu,&nbsp;Yiyong Zhang,&nbsp;Wen Lu,&nbsp;Wen-Hua Zhang,&nbsp;Junqiao Ding","doi":"10.1002/celc.202500323","DOIUrl":"https://doi.org/10.1002/celc.202500323","url":null,"abstract":"<p>LiNi_0.9Mn_0.1O₂ (LNM91) cathode has attracted significant attention in lithium-ion batteries (LIBs) due to its high capacity and low cost. However, its poor electrochemical performance and thermal stability hinder its application in electric vehicles. To overcome these limitations, this study proposes a novel one-step solid-state method for doping Al³⁺ and Mg²⁺ into the Ni and Li sites of LNM91, respectively, by directly mixing hydroxide precursors followed by calcination. Unlike the pristine cathode, which exhibits obvious cracking, the resultant Al/Mg codoped LNM91 maintains its structural integrity well after 100 cycles. The capacity retention significantly increases from 78.5 to 93.0% after 100 cycles at 0.5 C. Mechanistic studies reveal that Al³⁺ stabilizes the oxygen framework through strong Al<span></span>O bonds, while Mg²⁺ suppresses Li⁺/Ni²⁺ disorder via electrostatic repulsion. Their synergistic effect mitigates the detrimental H2-H3 phase transition and microcrack propagation, thereby bolstering rate capability and cycling performance. These results highlight the significance of Al/Mg codoping as a promising approach for developing high-performance cobalt-free and nickel-rich cathodes for LIBs.</p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500323","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145601086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantification of Urea in Electrocatalytic Systems","authors":"Mateusz Wojtas,&nbsp;Marija R. Zorić,&nbsp;Emiliana Fabbri,&nbsp;Thomas Justus Schmidt","doi":"10.1002/celc.202500302","DOIUrl":"https://doi.org/10.1002/celc.202500302","url":null,"abstract":"<p>Electrochemical urea synthesis (EUS) from CO₂ and nitrates has recently emerged as a more sustainable alternative to nitrogen fertilizers derived from fossil fuels. Indeed, using captured CO₂ and nitrates from wastewater can offer environmental benefits compared to conventional methods. On the road to EUS technology development, its accurate and reliable quantification is an undeniable cornerstone. As this field is still in its infancy, with very low product concentration and numerous side-products, EUS product quantification is challenging, with reported false positives and negatives. Despite the consensus that at least two methods ought to be used, the selection of the most suitable methods and quantification protocols is an open topic in the scientific community. This work presents a comparative study of the most common methods, highlighting their advantages, limitations, and recent developments, aiming to provide valuable insights to guide the advancement of this emerging field and facilitate the upscaling of sustainable fertilizer production.</p>","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"12 22","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500302","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145547300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}