• 文献标题:   The graphene-meso-macroporous SiO2 supported Pt-Ni alloy nanocatalyst for preferential oxidation of CO in H-2-rich gases
  • 文献类型:   Article
  • 作  者:   NIU T, ZHAO WW, LIU GL, CAO A, ZHANG LH, LIU Y
  • 作者关键词:   graphene, ptni bimetal, mesomacroporou, preferential oxidation, hydrogen
  • 出版物名称:   INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • ISSN:   0360-3199 EI 1879-3487
  • 通讯作者地址:   Tianjin Univ
  • 被引频次:   10
  • DOI:   10.1016/j.ijhydene.2014.09.105
  • 出版年:   2014

▎ 摘  要

In this work, nanoparticles of Pt-Ni alloy were supported on a new kind of composite which composed of graphene sheets and meso-macroporous SiO2, and the composite supported Pt-Ni catalyst was applied to the preferential oxidation of CO (CO-PROX) in H(2)rich gases. The bimetallic Pt-Ni alloy catalyst was characterized by using techniques of SEM, TEM, XRD, TPR, CO chemisorptions and XPS. The catalyst showed excellent catalytic performance for CO-PROX with high activity at low temperature, high selectivity and very good stability, which was attributed to the following characters of the catalyst: Pt -Ni nanoparticles were in alloy state and highly dispersed, Pt-Ni nanoparticles were preferentially loaded on the surface of graphene sheets, and the meso-macroporosity of the composite markedly improved the mass transferring ability. This is a case study, and this kind of catalysts can be extended to other gas-solid catalytic reactions. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.