ChemCatChem最新文献_第2页

Noble Metal/MXene Nanocomposites for Electrocatalysis: Interfacial Design, Functionalization, and Structure–Activity Relationships 电催化用贵金属/MXene纳米复合材料：界面设计、功能化和构效关系

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-10-11 DOI: 10.1002/cctc.71104

Ammara Ayub, Heehyeon Lee, Sohye Cho, Youngtak Oh

{"title":"Noble Metal/MXene Nanocomposites for Electrocatalysis: Interfacial Design, Functionalization, and Structure–Activity Relationships","authors":"Ammara Ayub, Heehyeon Lee, Sohye Cho, Youngtak Oh","doi":"10.1002/cctc.71104","DOIUrl":"https://doi.org/10.1002/cctc.71104","url":null,"abstract":"MXenes provide a highly conductive and chemically tunable platform for dispersing and electronically modulating noble-metal active sites in electrocatalysis. This review critically examines noble metal/MXene nanocomposites with emphasis on how defect chemistry, surface terminations, and metal-support interactions govern catalytic activity and durability. Unlike previous reviews that primarily summarize synthesis routes, catalyst compositions, or electrochemical performance, this review establishes an interface-centered and reaction-specific framework. The literature is organized according to defect-assisted anchoring, strong and reactive metal–support interactions, surface termination, and bimetallic or intermetallic engineering. These strategies are correlated with noble-metal dispersion, coordination environment, charge redistribution, d-band modulation, intermediate adsorption, and performance in MOR, HER, ORR, and NRR. The review also discusses active-site evolution under operating conditions and identifies major limitations, including MXene oxidation and restacking, noble-metal migration and dissolution, incomplete mechanistic evidence, nonstandardized durability testing, and limited device-level validation. By integrating interfacial coordination, reaction-specific adsorption energetics, operando characterization, stability, and scalability, this review provides a distinctive framework for the rational and practical design of noble metal/MXene electrocatalysts.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 19","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.71104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205299","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

Deciphering Catalytic Reaction Mechanisms and Modulation Dynamics via Single-Molecule Break Junctions 通过单分子断裂结解读催化反应机理和调制动力学

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-10-11 DOI: 10.1002/cctc.71105

Bailin Gao, Yinghao Huang, Xinhuan Zhang, Saisai Yuan

{"title":"Deciphering Catalytic Reaction Mechanisms and Modulation Dynamics via Single-Molecule Break Junctions","authors":"Bailin Gao, Yinghao Huang, Xinhuan Zhang, Saisai Yuan","doi":"10.1002/cctc.71105","DOIUrl":"https://doi.org/10.1002/cctc.71105","url":null,"abstract":"<div>\u0000 \u0000 Traditional catalytic characterization relies on ensembleaveraged observables that inherently mask the stochastic dynamics and mechanistic heterogeneity of individual reactive events. Single-molecule break junction platforms provide a distinctive operando framework to resolve these processes at the level of individual molecular trajectories. By coupling quantum transport measurements with sub-nanometer confinement, these systems transform molecular conductance from a passive electronic signal into a dynamic probe of reaction-state evolution and elementary-step kinetics. This review evaluates how scanning tunneling microscope break junctions (STM-BJ) and mechanically controllable (MC-BJ) break junctions provide complementary access to statistical state populations and time-resolved dynamics across reaction landscapes. The discussion delineates the conceptual mapping of conductance signatures to metastable intermediates and activated complexes while maintaining a critical focus on interpretative boundaries such as geometric degeneracy and interfacial noise. Beyond mechanistic interrogation, the nanogap environment acts as an active driver of reactivity where external perturbations, including oriented electric fields, electrochemical gating, and mechanical force, can be used to steer catalytic selectivity at the single-site limit. By identifying hidden electronic descriptors, break junction techniques provide specific design principles that could be emulated in bulk materials through coordination engineering and porous support design.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 19","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205302","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

Understanding the Regulatory Mechanism of Different Pt/Fe Ratio Binary Finite-Segregation Alloys on the CO Preferential Oxidation Reaction Through DFT and Microkinetic Simulations: Geometric and Electronic Effects 通过DFT和微动力学模拟了解不同Pt/Fe比二元有限偏析合金对CO优先氧化反应的调控机制：几何和电子效应

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-10-07 DOI: 10.1002/cctc.71102

Xiuhui Zheng, Yaqian Li, Chao Wang, Tao Xing, Jianlin Cao, Sheng Wei, Defu Yin, Qing Lu, Hao Yan, Yongxiao Tuo, Xiang Feng, Chaohe Yang, De Chen

{"title":"Understanding the Regulatory Mechanism of Different Pt/Fe Ratio Binary Finite-Segregation Alloys on the CO Preferential Oxidation Reaction Through DFT and Microkinetic Simulations: Geometric and Electronic Effects","authors":"Xiuhui Zheng, Yaqian Li, Chao Wang, Tao Xing, Jianlin Cao, Sheng Wei, Defu Yin, Qing Lu, Hao Yan, Yongxiao Tuo, Xiang Feng, Chaohe Yang, De Chen","doi":"10.1002/cctc.71102","DOIUrl":"https://doi.org/10.1002/cctc.71102","url":null,"abstract":"<div>\u0000 \u0000 Supported PtFe bimetallic alloy catalysts are widely used for the CO preferential oxidation. However, a comprehensive understanding of the optimal structural form for such alloy catalysts remains lacking, as well as of how the associated differences in geometric and electronic effects influence catalytic performance. In order to eliminate these differences, this study combines density functional theory and microkinetic modeling to demonstrate for the first time that among PtFe bimetallic alloys of varying composition, the optimal configuration is a finite-segregation structure with partial Pt segregation to the surface, rather than the core-shell structure or intermetallic compound. Adsorption calculations show that the Pt4Fe1(111) surface, with an intermediate Pt/Fe ratio, displays moderate adsorption strengths for both CO and O species and the weakest H-species adsorption; by contrast, low-Fe-ratio Pt(111) is poisoned by CO, whereas high-Fe-ratio Pt1Fe1(111) is poisoned by O species. The CO adsorption strength is well described by the d-band center adjusted by a 0.5-bandwidth correction. Microkinetic simulations confirm that Pt4Fe1(111) exhibits the highest theoretical CO-PROX activity and excellent selectivity, owing to its balanced geometric and electronic effects leading to near-optimal species binding energies. These findings provide deeper theoretical insight into the design of bimetallic alloy catalysts in CO preferential oxidation.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 19","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149145976","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

A Green and Sustainable Approach to the Synthesis of 1,5-Diketone Compounds Using a Magnetic Core-Shell Fe3O4@MCM-41-Pr-DSDA-Cu Nanocatalyst 利用磁性核壳Fe3O4@MCM-41-Pr-DSDA-Cu纳米催化剂合成1,5-二酮类化合物的绿色可持续方法

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-10-06 DOI: 10.1002/cctc.71103

Nasrin Moeini-Eghbali, Hossein Eshghi

引用次数: 0

Multifunctional Assessment of Rock-Salt (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O High-Entropy Oxide: CO2 Hydrogenation Activity and Environmental Impact 高熵氧化物（Co0.2Cu0.2Mg0.2Ni0.2Zn0.2）O岩盐的CO2加氢活性及环境影响的多功能评价

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-10-06 DOI: 10.1002/cctc.71097

Tina Skalar, Andreja Žgajnar Gotvajn, Maša Legan, Andrii Kostyniuk, Blaž Likozar, Dalibor Tatar, Igor Djerdj, Marjan Marinšek

{"title":"Multifunctional Assessment of Rock-Salt (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O High-Entropy Oxide: CO2 Hydrogenation Activity and Environmental Impact","authors":"Tina Skalar, Andreja Žgajnar Gotvajn, Maša Legan, Andrii Kostyniuk, Blaž Likozar, Dalibor Tatar, Igor Djerdj, Marjan Marinšek","doi":"10.1002/cctc.71097","DOIUrl":"https://doi.org/10.1002/cctc.71097","url":null,"abstract":"In this study, high-entropy oxide (HEO) (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O was synthesized via two different approaches, combustion synthesis (CS) and a solvent-deficient mechanochemical method (SDM), and comparatively investigated in terms of structural properties, catalytic performance in CO2 hydrogenation, and environmental impact through phytotoxicity assessment. X-ray diffraction confirmed the formation of a phase-pure cubic rock-salt structure (Fm-3m) for both synthesis routes. However, the CS-derived material exhibited a smaller crystallite size, a higher lattice microstrain, and more pronounced structural anisotropy compared to the SDM counterpart, while both materials showed relatively low specific surface areas. Catalytic testing was performed for CO2 hydrogenation at 20 bar, H2/CO2 = 3, and 200°C–300°C. Both HEO catalysts showed high selectivity toward methanol. The CS catalyst demonstrated markedly superior performance, achieving up to ∼16 mol% CO2 conversion and significantly higher methanol space-time yield (4.2 mmol gcat−1 h−1) at 300°C compared to the SDM sample. The enhanced activity is attributed to a higher defect density and lattice distortion induced by the combustion route. Environmental assessment using Lemna minor revealed that metal leaching from the HEOs significantly affected phytotoxicity. The CS-derived material showed higher leaching of Cu, Co, and Ni, highlighting a trade-off between catalytic activity and environmental stability.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 19","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.71097","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146057","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

Catalytic Properties and Applications of Monoamine Oxidases in Organic Synthesis and Biomedicine 单胺氧化酶的催化性质及其在有机合成和生物医学中的应用

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-10-06 DOI: 10.1002/cctc.71101

Lei Qin, Chunchun You, Mingxian Wang, Lei Du, Yongzheng Chen

{"title":"Catalytic Properties and Applications of Monoamine Oxidases in Organic Synthesis and Biomedicine","authors":"Lei Qin, Chunchun You, Mingxian Wang, Lei Du, Yongzheng Chen","doi":"10.1002/cctc.71101","DOIUrl":"https://doi.org/10.1002/cctc.71101","url":null,"abstract":"<div>\u0000 \u0000 Monoamine oxidases (MAOs) are distinguished by their exceptional enantio- and regioselectivity, efficiently catalyze the kinetic resolution or deracemization of racemic amines, thereby demonstrating unique advantages in the asymmetric synthesis of chiral amine compounds. This review provides a comprehensive overview of the sources, catalytic mechanisms, and current applications of MAOs in the synthesis of pharmaceutical intermediates and in green biomanufacturing processes. Furthermore, protein engineering and directed evolution have expanded the substrate scope of MAO-catalyzed reactions while substantially improving enzyme stability, catalytic efficiency, and process feasibility. Future developments are expected to further broaden the applications of MAOs in synergistic cascade and coupled reaction systems. In particular, continuous optimization of catalytic performance via artificial intelligence (AI)-driven precision enzyme engineering, combined with advanced process intensification strategies such as immobilized continuous-flow systems, holds promise for overcoming current limitations, including narrow substrate scope and low efficiency in large-scale production. These integrated strategies are anticipated to facilitate the industrial implementation of MAO-catalyzed processes for the green synthesis of chiral amine pharmaceutical intermediates at hectogram-to-kilogram scales, thereby reinforcing the pivotal role of MAOs in high-value biomanufacturing.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 19","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146055","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

Review on Advances in Perovskite Oxide-Based Catalysts for CO2 Hydrogenation to High Value-Added Products 钙钛矿氧化物基CO2加氢制高附加值产品催化剂研究进展

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-10-06 DOI: 10.1002/cctc.71100

Tingting Wang, Shuangxi Lin, Tingjun Fu, Zhenhua Li

{"title":"Review on Advances in Perovskite Oxide-Based Catalysts for CO2 Hydrogenation to High Value-Added Products","authors":"Tingting Wang, Shuangxi Lin, Tingjun Fu, Zhenhua Li","doi":"10.1002/cctc.71100","DOIUrl":"https://doi.org/10.1002/cctc.71100","url":null,"abstract":"<div>\u0000 \u0000 Carbon dioxide (CO2) hydrogenation is a core pathway in carbon capture, utilization and storage (CCUS) technology, converting CO2 into value-added chemicals and fuels toward carbon neutrality. Perovskite oxides have emerged as promising catalysts for thermocatalytic CO2 hydrogenation, owing to their tunable composition, controllable oxygen vacancies, unique redox properties and excellent thermal stability. Their catalytic performance is governed by crystal structure, defect chemistry, surface properties and the degree of metal dispersion regulated during synthesis. This review systematically summarizes mainstream synthesis methods of perovskite catalysts and discusses the formation mechanisms, advantages and limitations of each synthesis strategy. It further elaborates on advanced synthesis strategies for precise control of active metal dispersion, the mechanisms by which A- and B-site doping modulate active sites and surface properties, and catalytic performance tuning across diverse CO2 hydrogenation reactions. Supported perovskite catalysts that integrate metal nanoparticles onto perovskite supports to enhance catalytic activity are reviewed. Current challenges, including limited low-temperature activity, structural evolution under reaction conditions and the difficulties associated with industrial-scale synthesis are highlighted. This review concludes by outlining future research directions, providing theoretical insights and technical guidance for the rational design and industrial development of high-performance perovskite catalysts for CO2 hydrogenation.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 19","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146000","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

Trends in C2−C4 Alcohols Dehydration Catalyzed by the γ-Alumina (100) Surface: The Isobutanol Puzzle γ-氧化铝（100）表面催化C2−C4醇脱水的趋势：异丁醇之谜

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-09-30 DOI: 10.1002/cctc.71080

Pierre Marmey, Thomas Pigeon, Manuel Corral Valero, Pascal Raybaud

{"title":"Trends in C2−C4 Alcohols Dehydration Catalyzed by the γ-Alumina (100) Surface: The Isobutanol Puzzle","authors":"Pierre Marmey, Thomas Pigeon, Manuel Corral Valero, Pascal Raybaud","doi":"10.1002/cctc.71080","DOIUrl":"https://doi.org/10.1002/cctc.71080","url":null,"abstract":"The monomolecular dehydration of alcohols into olefins catalyzed by the (100) surface of γ-alumina is investigated by DFT simulations. The transition states (TS) and mean energy paths are determined for C2 to C4 alcohols through the intrinsic reaction coordinate (IRC) method. The reaction occurs through a non-ideal E2-type mechanism: the Cα─O bond stretching takes place before the Cβ─Hβ stretching along IRC. Quantitative structural and energetic trends are recovered: primary alcohols are the least reactive with the lower (respectively larger) Cα─O (respectively Cβ─Hβ) stretching, while secondary and tertiary are the most reactive with the larger (respectively lower) Cα─O (respectively Cβ─Hβ) stretching. However, the calculated dehydration kinetic constant of isobutanol underestimates the experimental one. By analyzing structural and charge descriptors along the IRC path and at TS, we identify that the TS of isobutanol dehydration is subject to steric hindrance between the two methyl groups present on <math></math> and the (100) surface, which destabilizes the TS during the <math></math> elimination. This destabilization is confirmed by the Bader charge analysis of the TS carbocationic alkyl moiety. We finally question the relevance of the Al site located on the (100) surface for catalyzing the dehydration of alcohols containing hindered <math></math> atom.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 19","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.71080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146872","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

Carbon Dioxide Activation and Organic Transformations Over ppm-Level Mg-Doped ZnO: A Facile Route to the N-Formylation of Amines Under Molecular Hydrogen 二氧化碳活化和有机转化在ppm水平mg掺杂ZnO上：在分子氢作用下胺n -甲酰化的一条简单途径

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-09-30 DOI: 10.1002/cctc.71099

Satish M. Chauhan, Suvarna S. Togrikar, Bhalchandra M. Bhanage

{"title":"Carbon Dioxide Activation and Organic Transformations Over ppm-Level Mg-Doped ZnO: A Facile Route to the N-Formylation of Amines Under Molecular Hydrogen","authors":"Satish M. Chauhan, Suvarna S. Togrikar, Bhalchandra M. Bhanage","doi":"10.1002/cctc.71099","DOIUrl":"https://doi.org/10.1002/cctc.71099","url":null,"abstract":"<div>\u0000 \u0000 Rising atmospheric CO2 concentration drives climate change, making CO2 conversion into value-added chemical a central challenge in chemistry. Here, we reported the synthesis of a ppm-level Mg-doped ZnO (Mg–ZnO) heterogeneous catalyst containing 118 ppm Mg (0.0118 wt.%), as determined by ICP-OES, prepared via a facile coprecipitation method and comprehensively characterized to confirm its structural, electronic, morphological, and compositional integrity. At an optimal Mg loading, the catalyst exhibits abundant surface basic sites, high surface area, and a robust heterostructure. The catalyst efficiently facilitates two CO2 utilization reactions, namely the selective N-formylation of amine under CO2/H2 in methanol and the water-mediated synthesis of quinazoline-2,4-diones from 2-aminobenzonitrile under CO2, demonstrated broad substrate scope across 18 structurally diverse substrate, delivering a TON of 1.89 × 104 and TOF of 632 h−1, outperforming reported noble metal systems. Further, the catalyst retained >60% activity over six cycles, conforming to excellent stability and recyclability. This noble metal free approach eliminates toxic reagents, achieves a high atom economy, and is aligned with green chemistry principles for sustainable CO2 valorization.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 19","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146942","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

Molten-Salt Etching Activates Cr-Doped Al2O3 on Graphene for Alkaline Oxygen Evolution 熔盐蚀刻激活石墨烯上掺铬Al2O3的碱性析氧

IF 4.1 3区化学

ChemCatChem Pub Date : 2026-09-30 DOI: 10.1002/cctc.71093

Zihan Gao, Chen Juan, Hao Zhang, Xiaolu Xiong, Chao Jing, Jianqiang Wang, Linjuan Zhang

{"title":"Molten-Salt Etching Activates Cr-Doped Al2O3 on Graphene for Alkaline Oxygen Evolution","authors":"Zihan Gao, Chen Juan, Hao Zhang, Xiaolu Xiong, Chao Jing, Jianqiang Wang, Linjuan Zhang","doi":"10.1002/cctc.71093","DOIUrl":"https://doi.org/10.1002/cctc.71093","url":null,"abstract":"<div>\u0000 \u0000 Aluminum oxide is an earth-abundant yet catalytically inert p-block oxide, as its lack of accessible d orbitals limits oxygen-intermediate binding in the conventional adsorbate evolution mechanism (AEM). Herein, we activate the intrinsic oxygen evolution reaction (OER) activity of Al2O3 by incorporating high-valence Cr species through a one-step molten-salt electrochemical strategy. Using Cr2AlC MAX phase as an integrated Cr, Al, and C precursor, selective Al extraction, Cr incorporation, and in situ carbon reconstruction are coupled to form Cr-doped Al2O3 nanoparticles anchored on a conductive graphene scaffold (Cr-Al2O3@G). The integrated route mitigates nanoparticle agglomeration and weak interfacial contact typical of multi-step syntheses. Cr-Al2O3@G delivers an overpotential of 310 mV at 10 mA cm−2, markedly lower than bare Al2O3 and comparable to commercial IrO2, while offering an estimated ∼70,000-fold lower metal cost. It also achieves a metal-mass-normalized activity of 112 A g−1. Mechanistic studies involving pH-dependent kinetics, tetramethylammonium cation inhibition, and in situ 18O-isotope differential electrochemical mass spectrometry (DEMS) reveal that Cr incorporation reconstructs the Al-O electronic environment and promotes a lattice-oxygen-mediated (LOM) pathway. This work provides a MAX-phase-derived strategy for cost-effective activation of p-block oxides.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 19","pages":""},"PeriodicalIF":4.1,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149072748","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