文献类型：期刊文献

英文题名：Constructive Transformation of WS2 into Atomically Dispersed W?O Sites Enables Stable Photocatalysis

作者：Niu, Wentian[1]; Li, Yiyang[1]; Xu, Zhihang[2,3]; Wang, Yifei[1]; Zhou, Zi-Jian[4]; Duan, Mengqi[1]; Ho, Ping-Luen[1,5]; Zheng, Weiran[6]; Pan, Xuelei[1]; Wang, Yanjie[1]; Fang, Huihuang[7]; Taylor, Robert A.[8]; Wu, Xin-Ping[4]; Zhu, Ye[2]; Tsang, Shik Chi Edman[1]

机构：[1] Wolfson Catalysis Centre, Department of Chemistry, University of Oxford, Oxford, OX1 3QR, United Kingdom; [2] Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Kowloon, Hung Hom, 999077, Hong Kong; [3] School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin, 300350, China; [4] State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China; [5] Department of Materials and London Centre for Nanotechnology, Imperial College London, London, SW7 2AZ, United Kingdom; [6] Department of Chemistry, Guangdong Technion-Israel Institute of Technology, Shantou, 515063, China; [7] National Engineering Research Centre of Chemical Fertilizer Catalyst [NERC-CFC], School of Chemical Engineering, Fuzhou University, Fujian Province, Fuzhou, 350002, China; [8] Department of Physics, University of Oxford, Clarendon Laboratory, Oxford, OX1 3PU, United Kingdom

年份：2026

卷号：16

期号：14

起止页码：13706

外文期刊名：ACS Catalysis

收录：EI(收录号：20263021144308);Scopus(收录号：2-s2.0-105044815115)

语种：英文

外文关键词：Catalyst activity - Complexation - Electrocatalysis - Monolayers - Spectroscopic analysis - Sulfur compounds - Tungsten compounds

摘要：Single-layer transition metal dichalcogenides (TMDs), such as WS2, offer promising catalytic performance and good electron mobility, making them attractive cocatalysts for photo- and electrocatalysis. However, their structural instability under reaction conditions often leads to formation of inactive bulk metal oxides and contamination of final products, limiting long-term performance and industrial applicability. Herein, we demonstrate that this instability can instead be harnessed as a constructive transformation pathway. Under mild aqueous conditions, exfoliated WS2 monolayers undergo spontaneous transformation at the interface with anatase TiO2, resulting in the formation of highly dispersed tungsten species anchored on the oxide surface and accompanied by the generation of abundant oxygen vacancies. Comprehensive structural, spectroscopic, and theoretical analyses reveal that strong interfacial interactions direct the oxidation pathway away from bulk oxide formation and toward stabilized, atomically dispersed active sites with modified local electronic structures. The resulting catalyst exhibits enhanced charge separation, improved conductivity, and markedly improved stability and performance under photocatalytic conditions. These serendipitous findings reframe TMD degradation as a beneficial process and establish a strategy for repurposing unstable metal sulfide monolayers into functional components of robust photocatalytic systems. ? 2026 The Authors. Published by American Chemical Society.