Fabrication of C@MoxTi1-xO2-δ nanocrystalline with functionalized interface as efficient and robust PtRu catalyst support for methanol electrooxidation  

作　　者：Jialong Li Lei Zhao Xifei Li Sue Hao Zhenbo Wang 

机构地区：[1]MIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,No.92 West-Da Zhi Street,Harbin 150001,Heilongjiang,China [2]Institute of Advanced Electrochemical Energy&School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,Shaanxi,China

出　　处：《Journal of Energy Chemistry》2020年第1期7-14,I0001,共9页能源化学（英文版）

基　　金：the National Natural Science Foundation of China (Grant Nos. 21273058, 21673064, 51802059 and 21503059);China Postdoctoral Science Foundation (Grant Nos. 2018M631938, 2018T110307 and 2017M621284);Heilongjiang Postdoctoral Fund (LBH-Z17074);Fundamental Research Funds for the Central Universities (Grant No. HIT. NSRIF. 2019040 and 2019041)

摘　　要：A core shell structured C@MoxTi1-xO2-δnanocrystal with a functionalized interface(C@MTNC-FI)was fabricated via the hydrothermal method with subsequent annealing derived from tetrabutyl orthotitanate.The formation of anatase TiO2 was inhibited by the simultaneous presence of the hydrothermal etching/regrowth process,infiltration of Mo dopants and carbon coating,which endows the C@MTNC-FI with an ultrafine crystalline architecture that has a Mo-functionalized interface and carbon-coated shell.Pt Ru nanoparticles(NPs)were supported on C@MTNC-FI by employing a microwave-assisted polyol process(MAPP).The obtained Pt Ru/C@MTNC-FI catalyst has 2.68 times higher mass activity towards methanol electrooxidation than that of the un-functionalized catalyst(Pt Ru/C@TNC)and 1.65 times higher mass activity than that of Pt Ru/C catalyst with over 25%increase in durability.The improved catalytic performance is due to several aspects including ultrafine crystals of TiO2 with abundant grain boundaries,Mofunctionalized interface with enhanced electron interactions,and core shell architecture with excellent electrical transport properties.This work suggests the potential application of an interface-functionalized crystalline material as a sustainable and clean energy solution.A core shell structured C@MoxTi1-xO2-δnanocrystal with a functionalized interface（C@MTNC-FI） was fabricated via the hydrothermal method with subsequent annealing derived from tetrabutyl orthotitanate.The formation of anatase TiO2 was inhibited by the simultaneous presence of the hydrothermal etching/regrowth process, infiltration of Mo dopants and carbon coating, which endows the C@MTNC-FI with an ultrafine crystalline architecture that has a Mo-functionalized interface and carbon-coated shell. Pt Ru nanoparticles（NPs） were supported on C@MTNC-FI by employing a microwave-assisted polyol process（MAPP）. The obtained Pt Ru/C@MTNC-FI catalyst has 2.68 times higher mass activity towards methanol electrooxidation than that of the un-functionalized catalyst（Pt Ru/C@TNC） and 1.65 times higher mass activity than that of Pt Ru/C catalyst with over 25% increase in durability. The improved catalytic performance is due to several aspects including ultrafine crystals of TiO2 with abundant grain boundaries, Mofunctionalized interface with enhanced electron interactions, and core shell architecture with excellent electrical transport properties. This work suggests the potential application of an interface-functionalized crystalline material as a sustainable and clean energy solution.

关 键 词：Interface functionalization TiO2 NANOCRYSTALLINE Mo doping Core–shell PtRu catalyst Methanol electrooxidation 

分 类 号：O643.36[理学—物理化学] TM911.4[理学—化学]