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Facile synthesis of a molybdenum phosphide (MoP) nanocomposite Pt support for high performance methanol oxidation

Abstract

Metal phosphides are of great recent interest as promoters to precious metal-driven catalytic oxidation of alcohols in direct alcohols fuel cells. In this work, a novel approach for facile and environmentally friendly synthesis of molybdenum phosphide (MoP) nanocrystallines anchored on graphitized carbon is developed by one-step pyrolysis of a phosphorus-containing resin exchanged with Mo5+. A significant promotion effect of MoP on Pt in methanol electrooxidation is observed. The Pt-MoP/C catalyst exhibits ultrahigh electroactivity, and compared to commercial Pt/C catalyst reaches a -140 mV more negative onset potential, and has 10 times the mass activity at 0.4 V vs. SCE and 5.1 times peak mass activity. In addition, Pt-MoP/C also has excellent stability and CO tolerance, including a peak mass activity retention of 81.4 % after 1,000 cycles as compared to 51.6% on commercial Pt/C and a 140 mV more negative COad oxidation potential. The noteworthy promotion effect of MoP on Pt in methanol electrooxidation is also evaluated by theoretical calculations.

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Publication details

The article was received on 06 Sep 2017, accepted on 08 Oct 2017 and first published on 09 Oct 2017


Article type: Paper
DOI: 10.1039/C7CY01835E
Citation: Catal. Sci. Technol., 2017, Accepted Manuscript
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    Facile synthesis of a molybdenum phosphide (MoP) nanocomposite Pt support for high performance methanol oxidation

    J. Zhu, S. Huang, K. Julian, S. Nie, S. Ma and P. K. Shen, Catal. Sci. Technol., 2017, Accepted Manuscript , DOI: 10.1039/C7CY01835E

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