▎ 摘　　要

The composited catalyst of graphene nanoribbons supported platinum-gold nanoalloy (PtAu/GNR) was prepared by microwave-assisted polyol method. GNRs network is a suitable carrier to support metal nanoparticles dispersedly. The effects of new GNR support and PtAu co-existence on the electrocatalytic performance of composite catalyst for ethanol oxidation are discussed. For further analyzing the anti-CO poisoning capability, the electron density difference and the electrostatic potential of catalyst surface, and the energy curve of CO oxidation reaction are calculated theoretically based on the first principle. The results show that PtAu/GNR has much superior catalytic activity and higher poisoning tolerance than the monometal composite catalyst. (C) 2015 Elsevier Ltd. All rights reserved.