Interface engineering of Pt/CeO_(2)-{100}catalysts for enhancing catalytic activity in auto-exhaust carbon particles oxidation  

作　　者：Peng Zhang Yitao Yang Tian Qin Xueqiu Wu Yuechang Wei Jing Xiong Xi Liu Yu Wang Zhen Zhao Jinqing Jiao Liwei Chen 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,Key Laboratory of Optical Detection Technology for Oil and Gas,College of Science,China University of Petroleum,Beijing 102249,China [2]School of Chemistry and Chemical,In-situ Center for Physical Sciences,Frontiers Science Center for Transformative Molecules,Shanghai Jiao Tong University,Shanghai 200240,China [3]School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China [4]School of Environmental Science and Engineering,Yancheng Institute of Technology,Yancheng 224051,China [5]State Key Laboratory of Chemical Safety,SINOPEC Research Institute of Safety Engineering Co.,Ltd.,Qingdao 266071,China

出　　处：《Chinese Chemical Letters》2025年第2期167-172,共6页中国化学快报(英文版)

基　　金：supported by the Beijing Nova Program(No.20220484215);National Key Research and Development Program of China(Nos.2022YFB3504100,2022YFB3506200,2021YFA1500300 and 2022YFA1500146);National Natural Science Foundation of China(Nos.22376217,22208373,22272090 and 22272106)。

摘　　要：Herein,we fabricate an embedding structure at the interface between Pt nanoparticles(NPs)and CeO_(2)-{100}nanocubes with surface defect sites(CeO_(2)-SDS)through quenching and gas bubbling-assisted membrane reduction methods.The in-situ substitution of Pt NPs for atomic-layer Ce lattice significantly increases the amount of reactive oxygen species from 133.68μmol/g to 199.44μmol/g.As a result,the distinctive geometric structure of Pt/CeO_(2)-SDS catalyst substantially improves the catalytic activity and stability for soot oxidation compared with the catalyst with no quenching process,i.e.,its T_(50)and TOF values are 332°C and 2.915 h^(-1),respectively.Combined with the results of experimental investigations and density functional theory calculations,it is unveiled that the unique embedding structure of Pt/CeO_(2)-SDS catalyst can facilitate significantly electron transfer from Pt to the CeO_(2)-{100}support,and induce the formation of interfacial[Ce-O_(x)-Pt_(2)]bond chains,which plays a crucial role in enhancing the key step of soot oxidation through the dual activation of surface lattice oxygen and molecular O_(2).Such a fundamental revelation of the interfacial electronic transmission and corresponding modification strategy contributes a novel opportunity to develop high-efficient and stable noble metal catalysts at the atomic level.

关 键 词：Pt NPs Defective ceria Nanocube Catalytic oxidation Soot particles 

分 类 号：X734.2[环境科学与工程—环境工程] O643.36[理学—物理化学]