ChemCatChem最新文献_第9页

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

Opportunities and Challenges of the Electrosynthesis of Nitrites and Nitrates From Ammonia 氨电合成亚硝酸盐和硝酸盐的机遇与挑战

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-16 DOI: 10.1002/cctc.70991

Thi Mung Vu, Felipe Matamala-Troncoso, Douglas R. MacFarlane, Hoang-Long Du, Alexandr N. Simonov

{"title":"Opportunities and Challenges of the Electrosynthesis of Nitrites and Nitrates From Ammonia","authors":"Thi Mung Vu, Felipe Matamala-Troncoso, Douglas R. MacFarlane, Hoang-Long Du, Alexandr N. Simonov","doi":"10.1002/cctc.70991","DOIUrl":"https://doi.org/10.1002/cctc.70991","url":null,"abstract":"Electrochemical ammonia oxidation can enable sustainable, distributed synthesis of nitrite and nitrate powered by renewable energy, as an alternative to the centralized Ostwald process. However, the catalyst-centered research struggles to produce ammonia electrooxidation systems delivering faradaic efficiency, yield rates, selectivity, and stability required for industrial implementation. This perspective aims to explore why current strategies fall short, revealing fundamental constraints that could not be resolved by the catalyst design alone so far. Practical nitrite/nitrate yield rates require potentials where oxygen evolution dominates, while harsh operational conditions inevitably cause corrosion of most materials. We suggest that further progress requires an integrated approach at the overall system level, rather than catalyst design under model conditions, and translating studies of the catalytic and degradation mechanisms into a practical operational environment. In turn, this requires electrolyser architectures suitable for robust high-current operation. This article aims to propose future research directions that might address these limitations.","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.70991","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754131","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

Feature Cover: Probing Oxygen Vacancy Dynamics and Their Mechanistic Consequences in Ethanol Oxidative Dehydrogenation Over Iron Molybdates 专题报道：探讨钼酸铁上乙醇氧化脱氢过程中的氧空位动力学及其机理

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-15 DOI: 10.1002/cctc.71020

Andrés Felipe Rodríguez, José E. Herrera

引用次数: 0

Ultrathin ZSM-5 Zeolite Supporting Platinum Nanoparticles Enabling Enhanced Catalytic Performance in Hydrodeoxygenation of Vanillin 支持铂纳米粒子的超薄ZSM-5沸石增强了香兰素加氢脱氧的催化性能

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-15 DOI: 10.1002/cctc.71016

Zhuoxi Li, Chengen Ho, Jun Shi, Rui Chen, Yicun Cai, Bin Li, Tianhao Li, Qiang Chen, Jinyuan Liu, Tongwen Yu

{"title":"Ultrathin ZSM-5 Zeolite Supporting Platinum Nanoparticles Enabling Enhanced Catalytic Performance in Hydrodeoxygenation of Vanillin","authors":"Zhuoxi Li, Chengen Ho, Jun Shi, Rui Chen, Yicun Cai, Bin Li, Tianhao Li, Qiang Chen, Jinyuan Liu, Tongwen Yu","doi":"10.1002/cctc.71016","DOIUrl":"https://doi.org/10.1002/cctc.71016","url":null,"abstract":"<div>\u0000 \u0000 The catalytic selectivity of heterogeneous reaction can be effectively regulated by the design of the thickness of zeolite in zeolite-supported noble metal catalysts. Herein, taking the industrially important hydrogenolysis of the biomass-derived compound vanillin as an example, ZSM-5 zeolite with a thinner b-axis (75 nm) loaded with platinum particles (denoted as Pt/ut-ZSM-5) exhibited 99% conversion and 97% selectivity toward the target product 2-methoxy-4-methylphenol. In contrast, the ZSM-5-supported platinum catalyst with a longer b-axis (175 nm) showed only 63.4% conversion and 50% selectivity, respectively. Molecular dynamics simulations reveal that the translocation times for intermediate vanillyl alcohol through thinner ZSM-5 is longer than vanillin, and the diffusion of 2-methoxy-4-methylphenol in thinner ZSM-5 is faster than that of vanillin. The dynamics of vanillin, vanillyl alcohol and 2-methoxy-4-methylphenol exhibit discontinuous behavior, accompanied by intermittent kinetic restrictions arising from free energy barriers within the straight tunnel of ZSM-5. The translocation times of vanillin and vanillyl alcohol through the thicker ZSM-5 zeolite are typically longer than those through the thinner one; the movement of vanillyl alcohol is still slower than vanillin in thicker zeolite. The slower release of intermediate vanillyl alcohol in both thinner and thicker ZSM-5 demonstrates the possible rate-limiting step in the reaction-diffusion process.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753871","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

Insight Into Inverse Catalysts for COx Hydrogenation: Recent Progress, Design Principles and Synthesis Methods COx加氢反相催化剂的研究进展、设计原理及合成方法

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-15 DOI: 10.1002/cctc.71015

Shihan Wang, Yuhao Tian, Zhiqiang Yan, Ting Wang, Hongyan Ban, Yanchun Li, Lei Li, Congming Li

{"title":"Insight Into Inverse Catalysts for COx Hydrogenation: Recent Progress, Design Principles and Synthesis Methods","authors":"Shihan Wang, Yuhao Tian, Zhiqiang Yan, Ting Wang, Hongyan Ban, Yanchun Li, Lei Li, Congming Li","doi":"10.1002/cctc.71015","DOIUrl":"https://doi.org/10.1002/cctc.71015","url":null,"abstract":"<div>\u0000 \u0000 Catalysts based on traditional metal-supported oxide systems have garnered significant attention in catalytic COX processes. However, achieving simultaneous high activity, selectivity, and stability remains a formidable challenge, plagued by the limitation of active sites and structural intimacy. Inverse catalysts, as a novel derivative of traditional supported catalysts, invert the spatial configuration of oxides and metals by dispersing nano-oxide on a metallic substrate. This creates unique interfacial structures and electronic properties via interfacial synergy effects, resulting in excellent performance in various catalytic reactions, making them one of the current research hotspots in the scope of C1 chemistry. This paper systematically reviews the research progress on inverse catalysts, which are categorized into Cu-based, Ni-based, and other metals-based types, mainly focusing on the structural features and catalytic performance in typical small-molecule conversion such as CO oxidation and CO2 hydrogenation. It elaborates structure–performance correlations from interfacial interaction, electronic effect, and defect engineering, illustrates performance optimization strategies, and generalizes mainstream synthetic routes. Finally, the paper identifies current challenges in inverse catalysts research. This review offers structure–activity relationship insights and design principles for inverse catalysts, contributing to future directions in design and synthesis.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753933","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

Front Cover: Enhanced Methane Dry Reforming Stability Under Concentrated Feedstocks Through Engineering Nickel-Vanadium Hydroxyapatite Interactions 封面：通过工程镍钒羟基磷灰石相互作用在浓缩原料下增强甲烷干重整稳定性

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-15 DOI: 10.1002/cctc.71019

Tiantian Lin, Yang Su, Cun Liu, Guiqiu Wang, Botao Qiao

引用次数: 0

Insights Into Nitrate-to-Ammonia Electrocatalysis on Graphene-Supported Asymmetric M1N3─M2N4 Dual-Atom Catalysts 石墨烯负载的不对称M1N3─M2N4双原子催化剂上硝酸制氨电催化的研究

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-15 DOI: 10.1002/cctc.71013

Shaopeng Xu, Linlin Li, Yan Yan, Wei Li, Jiaojiao Chen, Linda Zhang, Piao Ma, Xunlei Ding, Hao Li

{"title":"Insights Into Nitrate-to-Ammonia Electrocatalysis on Graphene-Supported Asymmetric M1N3─M2N4 Dual-Atom Catalysts","authors":"Shaopeng Xu, Linlin Li, Yan Yan, Wei Li, Jiaojiao Chen, Linda Zhang, Piao Ma, Xunlei Ding, Hao Li","doi":"10.1002/cctc.71013","DOIUrl":"https://doi.org/10.1002/cctc.71013","url":null,"abstract":"Nitrate (NO3−) pollution threatens aquatic ecosystems and drinking water safety, while electrocatalytic nitrate reduction to ammonia (NO3RR) offers a route for pollutant removal and nitrogen recovery. Here, density functional theory calculations were used to screen 100 graphene-supported asymmetric M1N3─M2N4 dual-atom catalysts (M1, M2 = 3d transition metals) by considering stability, pristine-site availability, reaction pathways, and ammonia desorption. Single-H adsorption free energy alone was insufficient to describe competition with the hydrogen evolution reaction in dual-site systems; *2H and *OH surface states should also be considered when determining catalyst-specific electrochemical potential windows. NO3− mainly adopted side-on@bridge and side-on@M1 configurations, leading to site-dependent pathway branching. Zero or near-zero UL values often coincide with strong NH3 binding. NiN3─ZnN4-P1 and CuN3─CoN4-P2 displayed balanced profiles, with limiting potentials of −0.29 and −0.23 V and NH3 desorption free energies of 0.12 and 0.35 eV, respectively. These results provide theoretical guidance for evaluating and designing asymmetric dual-site NO3RR catalysts by jointly considering site availability, pathway thermodynamics, and product release.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 16","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.71013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753932","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

Tunable Lattice Coordination in W-Based Double Perovskites via Correlated Ca/Co Doping for Efficient Oxygen Evolution Catalysis 通过相关Ca/Co掺杂可调w基双钙钛矿晶格配位的高效析氧催化

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-06 DOI: 10.1002/cctc.70967

Kyeongwon Han, Jeongeun Song, Boyean Kim, Hyeonji Park, Seulgi Kim, Hyungjin Kim, Heesu Kim, Myunggeun Park, Young-Jin Ko, Chanmin Lee, Yukwon Jeon

{"title":"Tunable Lattice Coordination in W-Based Double Perovskites via Correlated Ca/Co Doping for Efficient Oxygen Evolution Catalysis","authors":"Kyeongwon Han, Jeongeun Song, Boyean Kim, Hyeonji Park, Seulgi Kim, Hyungjin Kim, Heesu Kim, Myunggeun Park, Young-Jin Ko, Chanmin Lee, Yukwon Jeon","doi":"10.1002/cctc.70967","DOIUrl":"https://doi.org/10.1002/cctc.70967","url":null,"abstract":"Developing an efficient and durable oxygen evolution reaction (OER) catalyst is essential for the development of low-temperature water electrolysis. Here, a series of tungsten (W)-based double perovskites, Ba2CaxCo1−xWO6 (BWCC'-x), was systematically designed to understand the composition-structure-catalytic relationship. Structural analysis reveals a distinct electronic transition characterized by lattice contraction and modulated Co/W–O coordination restructuring, where Ca stabilizes a consistent local geometry. The optimized BWCC′-0.8 catalyst delivers robust intrinsic oxygen evolution reaction (OER) activity and operational durability, outperforming conventional catalysts. This performance is determined by a highly coordinated surface ionic synergy within the double perovskite framework, rather than a simple increase in Co loading. Spectroscopic and mechanistic insights reveal that the highly synergistic Co–O–W coordination network undergoes dynamic redox fluctuations at the maximized density of surface-rich Co3+ active centers and highly oxidized W6+ species. It can serve flexible adsorption/desorption kinetics for OH− intermediates with an efficient electronic buffer that mediates stable intermediate pathways at the host framework. Our findings provide a promising pathway for designing cost-effective, robust W-based electrocatalysts via precise B-site engineering of the double perovskites.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 15","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.70967","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752746","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

Salt-Confined Engineering of Hierarchically Porous Cobalt-Modified Nitrogen-Doped Carbon Architecture as a Cathode Electrocatalyst for Anion Exchange Membrane Fuel Cell 分层多孔钴修饰氮掺杂碳结构阴离子交换膜燃料电池阴极电催化剂的盐限工程研究

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-08-06 DOI: 10.1002/cctc.70961

Anil Kumar U., Asis Sethi, Chaithra Rajeev, Vishal M. Dhavale

{"title":"Salt-Confined Engineering of Hierarchically Porous Cobalt-Modified Nitrogen-Doped Carbon Architecture as a Cathode Electrocatalyst for Anion Exchange Membrane Fuel Cell","authors":"Anil Kumar U., Asis Sethi, Chaithra Rajeev, Vishal M. Dhavale","doi":"10.1002/cctc.70961","DOIUrl":"https://doi.org/10.1002/cctc.70961","url":null,"abstract":"<div>\u0000 \u0000 Developing durable and scalable non-platinum group metal (non-PGM) cathode catalysts remains a canonical challenge for anion exchange membrane fuel cells (AEMFCs). In this study, we report a hierarchically porous cobalt-modified nitrogen-doped carbon (Co─CoO/NC) electrocatalyst synthesized via salt-confined carbonization of glucose and urea using NaCl as a removable ionic template. Methodical TG-DSC analysis is employed to elucidate the thermal evolution of the precursors, revealing the sequential decomposition of urea, carbonization of glucose, and stabilization of the carbon framework under salt confinement, which has collectively suppressed the aggregation of cobalt nanoparticles during the growth. Structural and spectroscopic characterizations confirm uniformly dispersed, coordination-stabilized cobalt species within a defect-rich yet conductive carbon framework, in Co─CoO/NC. Nitrogen adsorption–desorption measurements show a Type IV isotherm with H3 hysteresis and a high surface area (∼240 m2 g−1), indicative of interconnected micro- and meso-pores. The resulting catalyst exhibits enhanced oxygen reduction reaction (ORR) activity and remarkable durability, with minimal loss of its E1/2 after 15,000 cycles. The MEA fabricated with Co─CoO/NC as cathode catalyst delivered a peak power density of 464 mW cm−2 in an AEMFC application.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 15","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752754","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