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Screw-like PdPt nanowires as highly efficient electrocatalysts for methanol and ethylene glycol oxidation

Abstract

The performance of Pd and Pt based catalysts for electrocatalysis is closely correlated with their surface structures and compositions. In this paper we developed an electrochemical route to synthesize novel bimetallic screw-like PdPt nanowires (PdPt NWs) with tunable composition. The surface of as synthesized screw-like nanowires are extremely rough, bounded with high-index facets and thus exhibiting high density of active sites. The particular surface structure together with synergetic effect and electronic effect account for the enhancing catalytic activity and durability towards methanol and ethylene glycol electrooxidation (MOR and EGOR). The activity of PdPt NWs is highly dependent on composition, the Pd1Pt1 NWs exhibit the highest catalytic activity for MOR that is 2.4-fold and 5.4-fold higher than the typical pure high-index Pt tetrahexahedrons (Pt THHs) and commercial Pt/C, respectively. It should be stressed that, the initial activity of Pd1Pt1 NWs towards EGOR is close to Pt THHs but the stability of the Pd1Pt1 NWs can be significantly enhanced. In situ FTIR spectroscopic studies of the Pd1Pt1 NWs have revealed that their ability of CO-tolerance is highly improved, and their capability for cleaving the C-C bond of EG is greatly promoted. This study has shed new light on the structure and compositon tuning of PdPt nanocatalysts with high performance, which is of great significance for direct alcohol fuel cells.

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Publication details

The article was received on 31 Oct 2017, accepted on 30 Dec 2017 and first published on 01 Jan 2018


Article type: Paper
DOI: 10.1039/C7TA09595C
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Screw-like PdPt nanowires as highly efficient electrocatalysts for methanol and ethylene glycol oxidation

    J. Tang, Q. Chen, L. You, H. Liao, S. Sun, S. Zhou, Z. Xu, Y. chen and G. Guo, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA09595C

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