Selective and stable Au-Cu bimetallic catalyst for CO-PROX

作     者：Feng Hong Guanjian Cheng Weihao Hu Shengyang Wang Qike Jiang Junhong Fu Botao Qiao Jiahui Huang Feng Hong;Guanjian Cheng;Weihao Hu;Shengyang Wang;Qike Jiang;Junhong Fu;Botao Qiao;Jiahui Huang

作者机构：Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of EnergySoochow Institute for Energy and Materials Innovations(SIEMIS)Soochow UniversitySuzhou 215006China CAS Key Laboratory of Science and Technology on Applied CatalysisDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Chemistry and Chemical EngineeringYulin UniversityYulin 719000China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第7期

页      面：9031-9038页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：This work was financially supported by the“Transformational Technologies for Clean Energy and Demonstration”,the Strategic Priority Research Program of the Chinese Academy of Sciences(CAS,No.XDA21030900) DNL Cooperation Fund,CAS(No.DNL201903) the National Natural Science Foundation of China(No.51701201) 

主　　题：gold catalysis CO preferential oxidation(CO-PROX) electronic interaction galvanic replacement 

摘      要：Gold-based catalysts are promising in CO preferential oxidation(CO-PROX)reaction in H_(2)-rich stream on account of their high intrinsic activity for CO elimination even at ambient ***,the decrease of CO conversion at elevated temperature due to the competition of H_(2)oxidation,together with the low stability of gold nanoparticles,has posed a dear ***,we report that Au-Cu bimetallic catalyst prepared by galvanic replacement method shows a wide temperature window for CO total conversion(30-100℃)and very good catalyst stability without deactivation in a 200-h *** characterizations combined with density functional theory(DFT)calculation reveal that the synergistic effect of Au-Cu,the electron transfer from Au to Cu,leads to not only strengthened chemisorption of CO but also weakened dissociation of H_(2),both of which are helpful in inhibiting the competition of H_(2)oxidation thus widening the temperature window for CO total conversion.