文献类型：期刊文献

英文题名：Mechanistic insights into the support effects of Cu in combustion

作者：Zhang, Xiangxue[1];Fei, Nina[1];Sang, Keng[1];Chen, Wenyao[1];Qian, Gang[1];Zhang, Jing[1];Chen, De[2];Zhou, Xinggui[1];Duan, Xuezhi[1];Yuan, Weikang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Norwegian Univ Sci & Technol, Dept Chem Engn, NO-7491 Trondheim, Norway

年份：2024

卷号：5

期号：6

外文期刊名：CELL REPORTS PHYSICAL SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001293721700001)】；

基金：This work was financially supported by the National Key R&D Program of China (2022YFA1503503 and 2022YFA1503504) , the Natural Science Foundation of China (22038003, 22178100, 22178101, and U22B20141) , the Shanghai Pilot Program for Basic Research (22TQ1400100-15) , the Fundamental Research Funds for the Central Universities, the Innovation Program of Shanghai Municipal Education Commission, the Program of Shanghai Academic/Technology Research Leader (21XD1421000) , and the Shanghai Science and Technology Innovation Action Plan (22JC1403800) . The authors thank beamline BL14W1 (Shanghai Synchrotron Radiation Facility) for the beam time and assistance in the experiments.

语种：英文

摘要：Support effects play a pivotal role in most heterogeneous catalysts, and understanding the underlying catalytic mechanism is crucial for guiding catalyst design and optimizing performance. In this study, we conduct a kinetics and mechanistic investigation into the support effects of Cu catalysts in hydrogen combustion by comparing reducible and nonreducible supports. Multiple characterization techniques are employed to comprehend the support effects, with the reducible support and low-valence Cu species highlighted for the most active Cu/ZrO2 2 catalyst. A redox-based kinetics strategy is further proposed by decoupling the reduction step and oxidation step. The as-obtained reduction and oxidation rate diagram indicates a significantly enhanced reduction rate for the reducible supported catalyst, attributed to the abundant surface oxygen vacancy for the generation of hydroxyl intermediates. These efforts aim to develop more efficient kinetics-based techniques for unraveling the nature of support effects, thereby offering a rational approach to designing highly active catalysts.