文献类型：期刊文献

英文题名：Significance of Epitaxial Growth of PtO2 on Rutile TiO2 for Pt/TiO2 Catalysts

作者：Tang, Xuan[1,2];Yu, Anwen[1,2];Yang, Qianqian[3];Yuan, Haiyang[3];Wang, Zhaohua[4];Xie, Junzhong[4];Zhou, Lihui[1];Guo, Yun[2];Ma, Ding[4];Dai, Sheng[1]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, State key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn,Minist Educ, Shanghai 200237, Peoples R China;[4]Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, New Cornerstone Sci Lab, Beijing 100871, Peoples R China

年份：2024

卷号：146

期号：6

起止页码：3764

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20240715538924);WOS:【SCI-EXPANDED(收录号:WOS:001160889800001)】；

基金：The X-ray absorption spectroscopy was conducted at the beamline 1W1B of the Beijing Synchrotron Radiation Facility (BSRF). Additional support was provided by the Frontiers Science Center for Materiobiology and Dynamic Chemistry and the Feringa Nobel Prize Scientist Joint Research Center. The authors also thank the Research Center of Analysis and Test at ECUST for technique support.

语种：英文

外文关键词：Catalysis - Catalyst activity - Electronic states - Epitaxial growth - Oxide minerals - Platinum - Platinum compounds

摘要：TiO2-supported Pt species have been widely applied in numerous critical reactions involving photo-, thermo-, and electrochemical-catalysis for decades. Manipulation of the state of the Pt species in Pt/TiO2 catalysts is crucial for fine-tuning their catalytic performance. Here, we report an interesting discovery showing the epitaxial growth of PtO2 atomic layers on rutile TiO2, potentially allowing control of the states of active Pt species in Pt/TiO2 catalysts. The presence of PtO2 atomic layers could modulate the geometric configuration and electronic state of the Pt species under reduction conditions, resulting in a spread of the particle shape and obtaining a Pt/PtO2/TiO2 structure with more positive valence of Pt species. As a result, such a catalyst exhibits exceptional electrocatalytic activity and stability toward hydrogen evolution reaction, while also promoting the thermocatalytic CO oxidation, surpassing the performance of the Pt/TiO2 catalyst with no epitaxial structure. This novel epitaxial growth of the PtO2 structure on rutile TiO2 in Pt/TiO2 catalysts shows its potential in the rational design of highly active and economical catalysts toward diverse catalytic reactions.