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

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Abstract

Metal phosphides are of great recent interest as promoters to precious metal-driven catalytic oxidation of alcohols in direct alcohol fuel cells. In this work, a novel approach for facile and environmentally friendly synthesis of molybdenum phosphide (MoP) nanocrystals 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, this 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 the peak mass activity. In addition, Pt–MoP/C has also excellent stability and CO tolerance, including a peak mass activity retention of 81.4% after 1000 cycles as compared to that of 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.

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

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

    J. Zhu, S. Huang, J. Key, S. Nie, S. Ma and P. K. Shen, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY01835E

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