文献类型：期刊文献

英文题名：Revealing the Size Effect of Ceria Nanocube-Supported Platinum Nanoparticles in Complete Propane Oxidation

作者：Ge, Shasha[1,2];Fan, Wenpu[1];Tang, Xuan[1,2];Cui, Yao[3];Wang, Dong[1];Gong, Xue-Qing[1];Dai, Sheng[2];Lou, Yang[4];Tang, Jie[3];Guo, Yanglong[1];Zhan, Wangcheng[1];Wang, Li[1];Guo, Yun[1]

机构：[1]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;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem,Sch Che, Shanghai 200237, Peoples R China;[3]Shanghai HuaYi New Mat Co Ltd, Shanghai 201507, Peoples R China;[4]Jiangnan Univ, Sch Chem & Mat Engn, Minist Educ, Key Lab Synthet & Biol Colloids, Wuxi 214122, Jiangsu, Peoples R China

年份：2024

卷号：14

期号：4

起止页码：2532

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20240715556239);WOS:【SCI-EXPANDED(收录号:WOS:001160926300001)】；

基金：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：propane oxidation; Pt/CeO2 catalyst; size effect; chemicalstate of Pt; geometric structure

摘要：The elimination of propane is one of the key tasks in reducing volatile organic compounds (VOCs) and automotive exhaust emissions. The platinum nanoparticle (NP) is a promising catalyst for propane oxidation, while the study of its structural characteristics and functionality remains in its infancy. In this work, we synthesized the nanocubes CeO2 with a well-defined (100) facet supporting Pt NPs with various sizes, from 1.3 to 7 nm, and systematically investigated the effect of the Pt size on complete propane oxidation efficiency. In particular, CeO2(100) supported Pt NPs smaller than 4 nm promote the formation of positively charged Pt sites, which hinder the adsorption and activation of propane and reduce the intrinsic activity for propane oxidation. Consequently, within this size range, the catalytic performance is primarily influenced by the electronic state of the Pt species, with metallic Pt being identified as the active site for the reaction. Conversely, as the particle size exceeds 4 nm, metallic Pt particles become dominant and the geometric structure starts to influence the activity as well. Such entanglement of electronic and geometric factors gives rise to a volcano relationship between reaction rates and Pt particle sizes ranging from 1.3 to 7 nm, while an increased correlation can be observed between the turnover frequencies and the particle sizes in this range. This knowledge can guide the synthesis of highly active catalysts, enabling the efficient oxidation of VOCs with reduced precious metal loadings.