文献类型：期刊文献

英文题名：Cu@Cr2O3 Noble-Metal-Free Hydrogen-Evolving Cocatalyst on Al-Doped SrTiO3 for Photocatalytic Overall Water Splitting

作者：Tang, Yu Yang[1];Li, Wenbo[2];Li, Wen Jing[1];Zhang, Yang[1];Lin, Hao Yang[1];Wang, Meng Min[1];Ding, Peng Cheng[1];Li, Zhen Ming[1];Zhu, Jun Ye[1];Sun, Hao Ze[1];Yuan, Haiyang[1];Dai, Sheng[2];Liu, Peng Fei[1];Yang, Huagui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai, Peoples R China

年份：2026

外文期刊名：ADVANCED ENERGY MATERIALS

收录：;EI(收录号：20263421335985);Scopus(收录号：2-s2.0-105047747971);WOS:【SCI-EXPANDED(收录号:WOS:001852553700001)】；

基金：This work was financially supported by the National Key Research and Development Program of China (No:2023YFA1507102), the National Natural Science Foundation of China (22239001 and 22376062), the Shanghai Pilot Program for Basic Research (22TQ1400100-12), the Science and Technology Commission of Shanghai Municipality (24DX1400200 and 22ZR1415700), and the Fundamental Research Funds for the Central Universities. The authors also thank the Frontiers Science Center for Materiobiology and Dynamic Chemistry, the crew of the BL14W1 beamline at the Shanghai Synchrotron Radiation Facility (SSRF) for their constructive assistance with the XAFS measurements and data analysis.

语种：英文

外文关键词：Cu0 active sites; core-shell structure; hydrogen evolution cocatalysts; photocatalytic overall water splitting; SrTiO3

摘要：The development of noble-metal-free cocatalysts is crucial for low-cost photocatalytic overall water splitting (POWS) systems. However, dynamic structural evolution of non-noble-metal materials under operando conditions results in a restricted activity of cocatalysts in POWS. Herein, we construct a core-shell structured Cu@Cr2O3 cocatalyst on Al-doped SrTiO3 (SrTiO3:Al) via a photodeposition method (denoted as Cu-PD/STO) for efficient H2 evolution in POWS. The Cu-PD/STO achieves the H2 evolution rate of 788.7 & micro;mol/h, surpassing all the recently reported noble-metal-free H2 evolution cocatalysts on SrTiO3 for POWS. Quasi in situ/operando characterizations elucidate the stable operation of Cu0 active sites in POWS, guaranteed by the photoinduced reduction of Cu sites and core-shell structure. Further characterizations and theoretical calculations reveal that Cu0 active sites provide accelerated electron extraction from SrTiO3:Al, optimized water dissociation, and hydrogen adsorption. Moreover, Cu0 active sites can promote the formation of Cr2O3 shells, which encapsulate the Cu0 active sites, protecting them against surface oxidation and suppressing the reverse reaction in POWS.