文献类型：期刊文献

中文题名：Synergistic effect of bimetallic RuPt/TiO_(2) catalyst in methane combustion

作者：Shi-Ying Cao[1];Fan Ye[2];Ni-Ni Zhang[1];Yang-Long Guo[1];Yun Guo[1];Li Wang[1];Sheng Dai[2];Wang-Cheng Zhan[1]

机构：[1]Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai,200237,China;[2]Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Centre,Institute of Fine Chemicals,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai,200237,China

年份：2023

卷号：42

期号：1

起止页码：165

中文期刊名：Rare Metals

外文期刊名：稀有金属（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；PubMed;

基金：financially supported by National Natural Science Foundation of China(Nos.21922602,22076047 and U21A20326);Shanghai Science and Technology Innovation Action Plan(No.20dz1204200);the Fundamental Research Funds for the Central Universities。

语种：英文

中文关键词：Synergistic effect;Bimetallic catalyst;Methane combustion;Redox cycle

摘要：Designing metal compounds based on their structure and chemical composition is essential in achieving desirable performance in methane oxidation,because of the synergistic effect between different metal elements.Herein,a bimetallic Ru-Pt catalyst on TiO_(2) support(RuPt-O/TiO_(2)) was prepared by in situ reduction followed by calcination in air.Compared with monometallic catalysts(Ru-O/TiO_(2) and Pt-O/TiO_(2)),the synergistic effect of mixed metals endowed bimetallic catalysts with excellent stability and outstanding performance in methane oxidation,with a reaction rate of 13.9×10^(-5)mol^(-1)_(CH_(4))·g^(-1)_(Ru+Pt)·s^(-1)at 303℃.The varied characterization results revealed that among the bimetallic catalysts,RuO_(2)was epitaxially grown on the TiO_(2) substrate owing to lattice matching between them,and part of the PtO_(x) adhered to the RuO_(2) surface,in addition to a single PtO_(x) nanoparticle with 4 nm in size.Consequently,Pt mainly existed in the form of Pt2+and Pt4+and a small amount of zero valence in the bimetallic catalyst,prompting the adsorption and activation of methane as the first and rate-controlling step for CH_(4) oxidation.More importantly,the RuO_(2) species provided additional oxygen species to facilitate the redox cycle of the PtO_(x) species.This study opens a new route for structurally designing promising catalysts for CH4oxidation.