ChemCatChem最新文献_第2页

Evolution of Carbamoyl Fluorides: Synthetic Strategies, Mechanistic Insights and Applications 碳氨甲酰氟化物的演变：合成策略、机理见解和应用

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-21 DOI: 10.1002/cctc.71028

Subhodeep Das, Soumyajit Pal, Supriyo Das, Ranjan Jana

{"title":"Evolution of Carbamoyl Fluorides: Synthetic Strategies, Mechanistic Insights and Applications","authors":"Subhodeep Das, Soumyajit Pal, Supriyo Das, Ranjan Jana","doi":"10.1002/cctc.71028","DOIUrl":"https://doi.org/10.1002/cctc.71028","url":null,"abstract":"<div>\u0000 \u0000 Carbamoyl fluorides have emerged as a versatile and strategic key intermediate at the interface of synthetic organic chemistry, medicinal chemistry, and chemical biology. Due to their distinct stability and selectivity compared to their chloride counterparts, carbamoyl fluorides allow precise access to amides, ureas, carbamates, and various nitrogen-containing scaffolds and molecular probes. In recent years, there has been a major drive toward their synthesis, including Metal-promoted formation of carbamoyl fluorides, radical and photoredox reactions, and metal-free sustainable reactions. Similar developments have increased their use in peptide modification, late-stage functionalization, and covalent enzyme inhibition, indicating their increasing importance in drug discovery and materials science. This review provides an extensive overview of current synthetic methods for carbamoyl fluorides, with a focus on mechanistic understanding, reaction scope, and limitations. In addition, recent uses in pharmaceuticals, bioconjugation, and functional materials are also critically discussed. To summarize, the use of carbamoyl fluorides as a next-generation acylating agent, tunable, biocompatible electrophile for covalent binding in modern chemical and chemical biology studies has been discussed.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784486","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

Recent Developments in Oxygen Reduction Reaction Catalysts: A Journey From Metal Clusters to Single-Atom Catalysts 氧还原反应催化剂的最新进展：从金属团簇到单原子催化剂的历程

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-21 DOI: 10.1002/cctc.71027

Anjumun Rasool, Mudasir Dar, Manzoor Ahmad Dar

{"title":"Recent Developments in Oxygen Reduction Reaction Catalysts: A Journey From Metal Clusters to Single-Atom Catalysts","authors":"Anjumun Rasool, Mudasir Dar, Manzoor Ahmad Dar","doi":"10.1002/cctc.71027","DOIUrl":"https://doi.org/10.1002/cctc.71027","url":null,"abstract":"<div>\u0000 \u0000 Electrochemical energy storage systems, including metal–oxygen batteries and fuel cells, are promising technologies for sustainable power generation, but their performance is limited by the sluggish oxygen reduction reaction (ORR). This review summarizes density functional theory (DFT)-guided strategies for designing high-performance ORR electrocatalysts, covering precious-metal nanoclusters (PMNCs), nonprecious metal nanoclusters (NPMCs), main-group nanoclusters (MGNCs), single-atom catalysts (SACs), and double-atom catalysts (DACs). We discuss ORR mechanisms, reaction pathways, limiting steps, and key activity descriptors, including adsorption energies of oxygenated intermediates, d-band center, charge transfer, coordination environment, and scaling relationships. PMNCs exhibit excellent intrinsic activity, NPMCs provide cost-effective four-electron pathways, and MGNCs enable metal-free catalysis through defect engineering. SAC activity is governed by metal–support interactions, M–Nx coordination, and heteroatom doping but remains constrained by scaling relationships and the Sabatier principle. DACs offer synergistic dual-metal active sites that enhance O─O activation, relax adsorption constraints, and often outperform SACs in activity and stability. The roles of interface engineering, support-induced charge transfer, electrolyte effects, and atomically precise synthesis are highlighted. Finally, challenges including active-site stabilization, coordination control, operando characterization, and data-driven catalyst discovery are discussed, providing a unified framework for the rational design of effective ORR electrocatalysts for next-generation energy conversion processes.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784489","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

Potential- and pH-Dependent Surface Oxidation of Niobium Nitride for the Oxygen Reduction Reaction: A DFT Study 氧还原反应中氮化铌的电位和ph依赖性表面氧化：DFT研究

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-20 DOI: 10.1002/cctc.71024

Rebecca Gerber, Avneet Bhuller, Samira Siahrostami

{"title":"Potential- and pH-Dependent Surface Oxidation of Niobium Nitride for the Oxygen Reduction Reaction: A DFT Study","authors":"Rebecca Gerber, Avneet Bhuller, Samira Siahrostami","doi":"10.1002/cctc.71024","DOIUrl":"https://doi.org/10.1002/cctc.71024","url":null,"abstract":"Transition metal nitrides (TMNs) are promising oxygen reduction reaction (ORR) catalysts owing to their high conductivity, stability, and earth abundance. However, active TMN catalysts are often identified using conventional ORR descriptors that neglect the catalyst resting state. Here, we investigate the ORR performance of 14 TMNs using density functional theory (DFT) calculations and conventional *OH/*OOH descriptors. Although these descriptors identify several promising candidates, most TMNs bind oxygen too strongly, causing conventional activity predictions to fail. Using Nb4N5(100) as a model system, we construct surface phase and Pourbaix diagrams to identify the relevant surface state as a function of potential and pH. Nb4N5(100) becomes increasingly oxygen-covered above 0.40 V under acidic conditions, with oxidation occurring at lower potentials as pH increases. Oxygen-covered surfaces alter ORR energetics and favor a dissociative pathway, challenging the commonly assumed associative mechanism. Despite accounting for surface oxidation, Nb4N5(100) remains a poor ORR catalyst because it excessivly stabilizes oxygenated intermediates. These findings demonstrate that realistic surface states must be considered alongside conventional descriptors when evaluating ORR catalysts.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.71024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Practical Protocol for the Auto-Tandem Isomerizing Hydroformylation: Systematic Optimization and Transferability Across Different Substrates 自动串联异构化氢甲酰化的实用方案：系统优化和跨不同底物的可转移性

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-20 DOI: 10.1002/cctc.71017

Jerome Hommes, Hendrik S. Lapainis, Dieter Vogt, Thomas Seidensticker

{"title":"A Practical Protocol for the Auto-Tandem Isomerizing Hydroformylation: Systematic Optimization and Transferability Across Different Substrates","authors":"Jerome Hommes, Hendrik S. Lapainis, Dieter Vogt, Thomas Seidensticker","doi":"10.1002/cctc.71017","DOIUrl":"https://doi.org/10.1002/cctc.71017","url":null,"abstract":"Rh/BiPhePhos-catalyzed isomerizing hydroformylation is an efficient strategy for converting internal olefins into valuable linear aldehydes through an auto-tandem process combining double bond isomerization and hydroformylation. Despite extensive research, previous studies have mainly focused on ligand development or individual reaction parameters, while systematic optimization of interacting reaction conditions remains comparatively rare. In this work, the isomerizing hydroformylation of 2-octene was systematically investigated using a design of experiments approach to identify key parameter interactions governing catalytic activity and linear selectivity. Two sets of optimized conditions were developed. Set 1: maximizing catalytic efficiency (118°C, 12 bar CO/H2, and 0.47 mol% catalyst), an l/b-ratio of 20.9 was obtained with a TOF20 of 272.7 h−1. Set 2: provided particularly high l/b-ratios (105°C, 5 bar CO/H2, and 0.1 mol% catalyst) provided even higher l/b-ratios of up to 27.4 at a conversion of 85.6%. Additional substrates like, 2-undecene yielded l/b-ratios of up to 30.2, while substrates requiring further isomerization steps, like 3-hexene, afforded l/b-ratios up to 34.3. Even for the challenging renewable substrate methyl oleate, linear aldehyde yields up to 35.8% were achieved, representing the highest value reported for this auto-tandem catalysis. This study establishes systematically optimized reaction conditions that expand the practical applicability of BiPhePhos-based isomerizing hydroformylation.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.71017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Indole Schiff Base Cu-bipy Mixed Ligands Complex Embedded Mesoporous MCM-41 for the Syntheses of Trisubstituted Imidazole Derivatives 吲哚席夫碱铜-双吡啶混合配体嵌入介孔MCM-41合成三取代咪唑衍生物

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-20 DOI: 10.1002/cctc.71018

Narmatha Venkatesan, Ramya Sadhasivam, Rajashri Varadarasu, Jayapratha Gunasekaran, Shanmuga Bharathi Kuppannan

{"title":"Indole Schiff Base Cu-bipy Mixed Ligands Complex Embedded Mesoporous MCM-41 for the Syntheses of Trisubstituted Imidazole Derivatives","authors":"Narmatha Venkatesan, Ramya Sadhasivam, Rajashri Varadarasu, Jayapratha Gunasekaran, Shanmuga Bharathi Kuppannan","doi":"10.1002/cctc.71018","DOIUrl":"https://doi.org/10.1002/cctc.71018","url":null,"abstract":"<div>\u0000 \u0000 A well-aligned heterogeneous catalyst was prepared by embedding indole Schiff base Cu-bipy mixed ligands complex on mesoporous MCM-41 (Mobil Composition of Matter No. 41). The synthesized materials have been characterized by various analytical and spectroscopic techniques like FT-IR, UV-DRS, PXRD, SEM, EDX, ICP-OES, TGA, N2 adsorption and desorption, and XPS studies. The Indole-Cu-bipy@MCM-41 was found as an efficient catalyst to facilitate the one-pot multicomponent syntheses of trisubstituted imidazole derivatives using benzil, ammonium acetate, and various substituted aldehydes under room temperature using EtOH solvent for 20 min. The catalyst showed excellent performance against a wide range of substrates (19 Nos.) viz., aryl, fused aryl, hetero, and aliphatic compounds with substituents of different electronic nature at various positions. Furthermore, the efficiency of the catalyst is compared with pure MCM-41, ligand, and Cu complex as catalysts under optimized reaction conditions and with other reported literature. The heterogeneous catalyst was recovered and reused up to five cycles in the synthesis of trisubstituted imidazoles. The stability and heterogeneity nature of the catalyst was studied by hot filtration test, FT-IR, PXRD, SEM-EDX, elemental mapping, and ICP-OES analysis.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784461","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

Alkyl Chain Dependent Imidazolium Ionic Liquid Modification of PtC Regulates Interfacial Water Networks for Enhanced Oxygen Reduction 烷基链依赖咪唑离子液体修饰PtC调节界面水网络增强氧还原

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-19 DOI: 10.1002/cctc.71009

Zejin He, Lisheng Qian, Jilong Xu, WeiYi Zhao, Yibo Wang, Xian Wang, Ji Li, Zheng Jiang

{"title":"Alkyl Chain Dependent Imidazolium Ionic Liquid Modification of PtC Regulates Interfacial Water Networks for Enhanced Oxygen Reduction","authors":"Zejin He, Lisheng Qian, Jilong Xu, WeiYi Zhao, Yibo Wang, Xian Wang, Ji Li, Zheng Jiang","doi":"10.1002/cctc.71009","DOIUrl":"https://doi.org/10.1002/cctc.71009","url":null,"abstract":"<div>\u0000 \u0000 Modulating the structure of interfacial electric double layer (EDL) represents a pivotal strategy for enhancing the oxygen reduction reaction activity (ORR) of PtC catalysts in acidic media. This work elucidates the mechanistic influence of imidazolium based ionic liquids (IL) with tailored alkyl chain lengths (C2, C4, C6) on both the ORR performance and the nanoscale organization of the EDL at the Pt electrocatalyst interface. We demonstrate that the imidazolium ring coordinates selectively with Pt surfaces, enabling stable adsorption and creating a well ordered, nanoconfined environment. Increasing alkyl chain length enhances hydrophobic interactions, which systematically disrupt the interfacial water network and break hydrogen bond continuity. Remarkably, the [C4C1im]+ cation exhibits an optimal balance for structuring hydrogen bonds across both confined and bulk like regions, facilitating dynamic water clusters that yield maximum ORR activity. Through combined in situ attenuated total reflection surface enhanced infrared absorption spectroscopy (ATR-SEIRAS) and electrochemical studies, we uncover how molecular level design of IL governs hydrogen bond dynamics and directs proton coupled electron transfer kinetics, offering profound insights into interfacial microengineering for advanced electrocatalysis.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148784166","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

FeP2-Modified NiCu-Layered Double Hydroxide In Situ Grown on Cobalt Foam for Highly Efficient Alkaline Oxygen Evolution Reaction 在泡沫钴表面原位生长fep2修饰nicu层状双氢氧化物的高效碱性析氧反应

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-18 DOI: 10.1002/cctc.71029

Xiqun Sheng, Zheng Yang, Cheng Zhang, Xing Zhong, Jinyan Liu, Quantao Li, Changfeng Yi, Qing Li, Guangfu Liao, Zushun Xu

{"title":"FeP2-Modified NiCu-Layered Double Hydroxide In Situ Grown on Cobalt Foam for Highly Efficient Alkaline Oxygen Evolution Reaction","authors":"Xiqun Sheng, Zheng Yang, Cheng Zhang, Xing Zhong, Jinyan Liu, Quantao Li, Changfeng Yi, Qing Li, Guangfu Liao, Zushun Xu","doi":"10.1002/cctc.71029","DOIUrl":"https://doi.org/10.1002/cctc.71029","url":null,"abstract":"<div>\u0000 \u0000 In this study, we have successfully synthesized FeP2 nanoparticle-modified NiCu-layered double hydroxide (LDH) nanosheets in situ grown on three-dimensional porous cobalt foam (denoted as FeP2/NiCu-LDH@NCo) toward high-efficiency and stable oxygen evolution reaction (OER) electrocatalysis in alkaline media. The phosphorization treatment and FeP2 introduction play a crucial role in effectively regulating the electronic structure of active sites, facilitating the electron transport and optimizing the reaction energy barrier of the catalytic process. Furthermore, the hierarchical flower-like structure of NiCu-LDH presents a larger surface area with more exposed active sites, thus resulting in exceptional OER catalytic activity. The as-prepared FeP2/NiCu-LDH@NCo requires only 237 mV to reach a current density of 10 mA cm−2 in 1.0 M KOH solution, outperforming the FeP2/NiCo-LDH@NCo counterpart and most previously reported non-noble OER catalysts. The FeP2/NiCu-LDH@NCo catalyst also displays superior stability, maintaining a sustained current density throughout long-term electrolysis.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754062","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

Iridium-Photocatalyzed Deoxygenation of Sulfoxides: Competing Oxidative and Reductive Pathways for Thioether Synthesis 铱光催化亚砜的脱氧：硫醚合成的竞争性氧化和还原途径

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-16 DOI: 10.1002/cctc.71006

Iain Robb, Zineb El Moqaouil, Mohammad Jaber, Marianne Kjellberg, Philipp Gotico, Emmanuel Nicolas, Annamaria Quaranta, Lucile Anthore-Dalion

{"title":"Iridium-Photocatalyzed Deoxygenation of Sulfoxides: Competing Oxidative and Reductive Pathways for Thioether Synthesis","authors":"Iain Robb, Zineb El Moqaouil, Mohammad Jaber, Marianne Kjellberg, Philipp Gotico, Emmanuel Nicolas, Annamaria Quaranta, Lucile Anthore-Dalion","doi":"10.1002/cctc.71006","DOIUrl":"https://doi.org/10.1002/cctc.71006","url":null,"abstract":"<div>\u0000 \u0000 The deoxygenation of sulfoxides to thioethers is a synthetically valuable transformation, given the ubiquity of thioether motifs in pharmaceuticals, materials, and natural products. However, traditional methods often rely on harsh conditions, stoichiometric reagents, or oxophilic additives, limiting their sustainability and functional group compatibility. Modern methods, relying on photoredox catalysis have since been developed but still require strong oxophilic reagents or high catalyst loadings to circumvent the intrinsic difficulty in the reduction of sulfoxides. Here, we demonstrate that simple iridium-based photocatalysts can convert both diaryl and aryl-alkyl sulfoxides into their corresponding sulfides in 17%–95% yields, without the need for oxophilic sacrificial reagents, by finely tuning the reaction conditions. The reaction proceeds under visible-light irradiation, employing simple amines as sacrificial electron donors and water as a key additive, while tolerating other reducible functional groups such as nitriles and free carboxylic acids. Multidisciplinary mechanistic investigations, combining nanosecond transient absorption spectroscopy, cyclic voltammetry, and density functional theory (DFT) calculations demonstrate that the efficiency of the reaction implies both competing oxidative and reductive quenching pathways of the excited-state iridium photocatalyst.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754129","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

Synergistic Structural and Electronic Modulation of Ceramic Fiber-Supported Ultralow‑Ru Catalysts for Exceptional Ammonia‑to‑Hydrogen Performance 陶瓷纤维支撑的超低钌催化剂的协同结构和电子调制具有优异的氨氢性能

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-16 DOI: 10.1002/cctc.71025

Siying Li, Junhui Liang, Kaibin Xia, Wenchuan Huang, Huayu Chen, Chengli Jin, Hangning Chen, Chenhao Du, Liuqi Wang, Xiachao Chen, Da Chen

{"title":"Synergistic Structural and Electronic Modulation of Ceramic Fiber-Supported Ultralow‑Ru Catalysts for Exceptional Ammonia‑to‑Hydrogen Performance","authors":"Siying Li, Junhui Liang, Kaibin Xia, Wenchuan Huang, Huayu Chen, Chengli Jin, Hangning Chen, Chenhao Du, Liuqi Wang, Xiachao Chen, Da Chen","doi":"10.1002/cctc.71025","DOIUrl":"https://doi.org/10.1002/cctc.71025","url":null,"abstract":"<div>\u0000 \u0000 The development of efficient and durable catalysts for ammonia decomposition is critical to realizing a hydrogen economy, yet remains challenging due to the trade-off between noble metal loading and catalytic stability. Here, we demonstrate that ceramic fiber (CF) supports enable exceptional ammonia decomposition performance with ultralow Ru loading (0.3 wt%). The optimized Ru-CF catalyst achieves 99.47% NH3 conversion at 525°C under a gas hourly space velocity of 9000 mL·gcat−1·h−1, maintaining stable operation over 100 h—substantially outperforming its glass fiber (GF)-supported counterpart. A systematic mechanistic investigation reveals that the CF architecture not only induces abundant oxygen vacancies and modulates the electronic structure of Ru via strong metal–support interactions, but also optimizes Ru dispersion and creates a favorable distribution of acid–base sites. These synergistic effects collectively facilitate N─H bond cleavage and accelerate N2 recombinative desorption—the kinetically relevant step—fundamentally enhancing the overall reaction kinetics. This work establishes fiber-based supports as a versatile platform for designing high-performance, low-loading precious metal catalysts, offering a viable pathway toward practical hydrogen production from ammonia.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754128","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

Engineering NixCu(100-x)@Ni Electrocatalysts on Microwave-Reduced Ni/C for Efficient Hydrogen Evolution Reaction 微波还原Ni/C高效析氢反应NixCu(100-x)@Ni电催化剂

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-16 DOI: 10.1002/cctc.71014

Aybüke Leba Akman, Ayşenur Öztürk Aydın, Özkan Aydın, Murat Farsak

{"title":"Engineering NixCu(100-x)@Ni Electrocatalysts on Microwave-Reduced Ni/C for Efficient Hydrogen Evolution Reaction","authors":"Aybüke Leba Akman, Ayşenur Öztürk Aydın, Özkan Aydın, Murat Farsak","doi":"10.1002/cctc.71014","DOIUrl":"https://doi.org/10.1002/cctc.71014","url":null,"abstract":"In this study, a novel synergistic three-layer architecture-comprising a microwave-reduced Ni/C base, an electrodeposited Ni interlayer, and a bimetallic Ni–Cu top coat (Ni30Cu70/Ni/M)-was designed for the hydrogen evolution reaction (HER) in alkaline media. Structural characterization by X-ray diffraction (XRD) confirmed the formation of a highly crystalline Ni–Cu alloy, while scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) spectroscopy revealed morphological evolution and surface oxidation. The catalyst initially exhibited a low Tafel slope of approximately 79.4 mV dec−1, suggesting a mechanism under mixed Volmer–Heyrovsky control. However, chronoamperometric tests at −0.3 V (vs. RHE) over 60 h showed a gradual increase in catalytic activity, suggesting a surface reconstruction process. The integration of structural and electrochemical data indicates stable HER performance over the tested 60-h period. The findings demonstrate that surface engineering enhances catalytic efficiency in alkaline water electrolysis, emphasizing its significance for optimizing catalysts in practical applications. The findings provide a promising basis for future catalyst development.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.71014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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