ChemElectroChem最新文献_第9页

IF 3.5 4区化学

ChemElectroChem Pub Date : 2026-06-10 DOI: 10.1002/celc.70222

Hans-Jörg Himmel

引用次数: 0

Electroreductive Desulfurization of Thioacetals 硫缩醛的电还原脱硫

IF 3.5 4区化学

ChemElectroChem Pub Date : 2026-06-07 DOI: 10.1002/celc.70240

Ellymay Goossens, Pintu Maity, Caterina Momoli, Andrey Shatskiy, Johannes Röckl, Guillermo Ahumada, Laura Palombi, Helena Lundberg

引用次数: 0

Dynamic Oxygen Species Evolution Boosts Acidic Water Oxidation on W-Doped RuO2 动态氧进化促进w掺杂RuO2的酸性水氧化

IF 3.5 4区化学

ChemElectroChem Pub Date : 2026-06-05 DOI: 10.1002/celc.70242

Bichen Yuan, Ronghe Yang, Kiros Haile Hagos, Shitao Min, Mingyuan Yang, Yuxuan Guo, Xiaoxing Liang, Xiaoming Sun, Fengmei Wang

{"title":"Dynamic Oxygen Species Evolution Boosts Acidic Water Oxidation on W-Doped RuO2","authors":"Bichen Yuan, Ronghe Yang, Kiros Haile Hagos, Shitao Min, Mingyuan Yang, Yuxuan Guo, Xiaoxing Liang, Xiaoming Sun, Fengmei Wang","doi":"10.1002/celc.70242","DOIUrl":"https://doi.org/10.1002/celc.70242","url":null,"abstract":"RuO2 undergoes severe structural degradation during acidic oxygen evolution reaction (OER) under high anodic potentials, including Ru oxidation into high-valence species and lattice oxygen depletion, limiting its practical application. Tungsten, featuring strong oxophilicity and multiple valence states, effectively modulates the electronic structure of Ru sites due to electronegativity difference between Wn+ and Ru4+, stabilizing both Ru centers and lattice oxygen. Accordingly, a W-doped RuO2 catalyst (W0.05Ru0.95O2, WRO) is developed to achieve dynamic oxygen species evolution via regulated lattice oxygen diffusion kinetics. The optimized oxygen diffusion coefficient (2.11 × 10−15 cm2 s−1) ensures a balance between oxygen vacancy replenishment and lattice oxygen retention. X-ray absorption spectroscopy and tetramethylammonium probing reveal that WRO undergoes LOM-dominated dynamic reconstruction at the initial stage, transforming from low-coordination defective sites to a stable six-coordinated Ru-O framework. Consequently, WRO exhibits high activity with overpotential of 200 mV at 10 mA cm−2 in a three-electrode system and promising durability of >400 h at 100 mA cm−2 in a two-electrode system. A PEM electrolyzer with WRO as the anode operates stably for over 130 h at 200 mA cm−2. This work demonstrates that tuning oxygen diffusion kinetics enables dynamic coordination regulation, offering new insights for designing robust acidic OER catalysts.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 12","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174000","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}

引用次数: 0

Electrochemical Sensor Based on Molecularly Imprinted Polymer for Cefuroxime Detection in Biological and Environmental Samples 基于分子印迹聚合物的电化学传感器检测生物和环境样品中的头孢呋辛

IF 3.5 4区化学

ChemElectroChem Pub Date : 2026-06-04 DOI: 10.1002/celc.70218

Houda Essousi, Bogdan Feier, Mihaela Tertis, Maria Suciu, Jassem Wannassi, Houcine Barhoumi, Cecilia Cristea

{"title":"Electrochemical Sensor Based on Molecularly Imprinted Polymer for Cefuroxime Detection in Biological and Environmental Samples","authors":"Houda Essousi, Bogdan Feier, Mihaela Tertis, Maria Suciu, Jassem Wannassi, Houcine Barhoumi, Cecilia Cristea","doi":"10.1002/celc.70218","DOIUrl":"https://doi.org/10.1002/celc.70218","url":null,"abstract":"Cefuroxime (CFR), a widely used second-generation cephalosporin antibiotic, is increasingly detected in real samples due to its extensive use. Its presence raises concerns related to antimicrobial resistance and potential health risks, highlighting the urgent need for sensitive and selective detection. A novel electrochemical sensor based on a molecularly imprinted polymer (MIP) was developed for the selective detection of CFR. The MIP film was fabricated by electropolymerization of 3,4-ethylenedioxythiophene (EDOT) as the functional monomer and CFR as the template molecule, in the presence of gold nanoparticles (AuNPs) and titanium carbide MXene. The polymer was deposited onto a multiwalled carbon nanotube–modified screen-printed carbon electrode (SPE-MWCNT). The prepared sensor was characterized using scanning electron microscopy, cyclic voltammetry, and differential pulse voltammetry. Key experimental parameters, including monomer and template concentrations, number of polymerization cycles, template removal, and incubation time, were optimized. Under optimized conditions, the sensor exhibited a detection limit of 1.0 × 10−9 mol L−1 and a wide linear response range from 1.0 × 10−9 to 1.0 × 10−4 mol L−1 (logarithmic scale). The sensor was successfully applied to the determination of CFR in human serum and seawater samples, with recoveries ranging from 75.45% to 93.13% for human serum and 87.41% to 91.7% for seawater.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 12","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70218","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174024","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}

引用次数: 0

A Proof of Principle for the Phase-Dependent Electrocatalytic Activity of NiTi Shape Memory Alloys for the Oxygen Evolution Reaction 镍钛形状记忆合金在析氧反应中相依赖电催化活性的原理证明

IF 3.5 4区化学

ChemElectroChem Pub Date : 2026-06-03 DOI: 10.1002/celc.202500467

Vineetha Vinayakumar, Santiago Benito, Aneeta Jose, Alexander Kunzmann, Adarsh Jain, Ruben Skjelstad Dragland, Mohit Chatwani, Blaž Toplak, Adithya Aravind, Dennis Meier, Oluwaseyi Oluwabi, Jan Frenzel, Sebastian Weber, Gabi Schierning, Doris Segets

{"title":"A Proof of Principle for the Phase-Dependent Electrocatalytic Activity of NiTi Shape Memory Alloys for the Oxygen Evolution Reaction","authors":"Vineetha Vinayakumar, Santiago Benito, Aneeta Jose, Alexander Kunzmann, Adarsh Jain, Ruben Skjelstad Dragland, Mohit Chatwani, Blaž Toplak, Adithya Aravind, Dennis Meier, Oluwaseyi Oluwabi, Jan Frenzel, Sebastian Weber, Gabi Schierning, Doris Segets","doi":"10.1002/celc.202500467","DOIUrl":"https://doi.org/10.1002/celc.202500467","url":null,"abstract":"Nickel–titanium (NiTi) shape memory alloys are intermetallic compounds that can exhibit a reversible martensitic phase transformation. While extensively studied for biomedical and actuator applications, their potential as electrocatalysts for the oxygen evolution reaction (OER) remains virtually unexplored. Here, we systematically investigate how phase structure influences OER activity in NiTi alloys by comparing martensite Ni50Ti50 (B19’ monoclinic) and austenite Ni51.2Ti48.8 (B2 cubic). Despite differing by only 1.2 at.% Ni, the investigated specimens exhibit markedly different electrocatalytic behavior. In 1 M KOH containing 15 ppb Fe, the martensitic phase requires 40 mV lower overpotential (450 vs. 490 mV at 10 mA cm−2) and maintains stable operation at 1.56 V vs. RHE for 12 h. This improved activity correlates with phase-dependent properties: enhanced electrical conductivity, finer surface texture, and markedly increased hydrophilicity (contact angle 21° vs. 71°). The martensitic phase also shows a 10% larger electrochemically active surface area. Under elevated Fe levels (150 ppb), the martensite phase undergoes stronger surface restructuring and achieves a 370 mV lower overpotential, indicating superior Fe incorporation. These findings demonstrate that OER performance in NiTi alloys is systematically tunable via microstructural states, establishing phase engineering as a promising strategy for designing next-generation water-splitting electrocatalysts.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 12","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.202500467","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148147112","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}

引用次数: 0

Urea-Bridged Anchoring of Ultralow-Loading Pt Nanoparticles on N-Doped Porous Carbon for High-Performance Oxygen Reduction Reaction 氮掺杂多孔碳上脲桥锚定超低负载铂纳米颗粒用于高性能氧还原反应

IF 3.5 4区化学

ChemElectroChem Pub Date : 2026-06-02 DOI: 10.1002/celc.70224

Na Liu, Luqiong Liu, Kuang Sheng, Yanqiu Wang, Zhiying Ding, Jie Li

{"title":"Urea-Bridged Anchoring of Ultralow-Loading Pt Nanoparticles on N-Doped Porous Carbon for High-Performance Oxygen Reduction Reaction","authors":"Na Liu, Luqiong Liu, Kuang Sheng, Yanqiu Wang, Zhiying Ding, Jie Li","doi":"10.1002/celc.70224","DOIUrl":"https://doi.org/10.1002/celc.70224","url":null,"abstract":"Platinum (Pt) remains the benchmark electrocatalyst for oxygen reduction reaction (ORR), yet its high cost impedes deployment in fuel cells. Reducing Pt loading while preserving stability and accessibility is therefore essential. Here, we report a urea-bridged strategy to anchor ultra-low Pt on a nitrogen-doped carbon support (NCA1.5-PtUrea, 1.72 wt% Pt). Urea acts as a bridging molecule, connecting Pt precursor and N/O-functional groups of the support to form a [PtCl6]2−-Urea-NCA1.5 ternary assembly, achieving preliminary dispersion of platinum. During annealing, its decomposition induces secondary nitrogen doping, tunes the electronic structure, enhances the strong interaction between metal and support, confines Pt growth, ultimately yielding uniform nanoparticles of ~2 nm in diameter. In 0.1 M KOH, NCA1.5-PtUrea delivers a half-wave potential (E1/2) of 0.88 V (vs. RHE), outperforming 20 wt% Pt/C (0.86 V vs. RHE). Notably, after 10,000 cyclic voltammetry cycles, the E1/2 loss is only 4 mV, compared with 27 mV for Pt/C. When implemented as the cathode catalyst in an aluminum-air battery, NCA1.5-PtUrea achieves a peak power density of 582.3 mW cm−2 (vs. 335.9 mW cm−2 for Pt/C) and sustains stable discharge. This urea-bridged strategy, integrating molecular coordination with support engineering, offers a practical route to maximize Pt utilization at ultralow loadings.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 11","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70224","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173874","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}

引用次数: 0

Dual-Site Catalysis in Electrocatalytic C–N Coupling: Challenges and Design Principles 电催化C-N耦合中的双催化：挑战和设计原则

IF 3.5 4区化学

ChemElectroChem Pub Date : 2026-05-29 DOI: 10.1002/celc.70238

Tao You, Jiacheng Li, Junyan Li, Guangqin Li

引用次数: 0

IF 3.5 4区化学

ChemElectroChem Pub Date : 2026-05-27