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    Plasma-Assisted Synthesis of NiCoP for Efficient Overall Water Splitting

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    Type
    Article
    Authors
    Liang, Hanfeng cc
    Gandi, Appala
    Anjum, Dalaver H. cc
    Wang, Xianbin
    Schwingenschlögl, Udo cc
    Alshareef, Husam N. cc
    KAUST Department
    Computational Physics and Materials Science (CPMS)
    Electron Microscopy
    Functional Nanomaterials and Devices Research Group
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Safety & Facility
    Date
    2016-11-09
    Online Publication Date
    2016-11-09
    Print Publication Date
    2016-12-14
    Permanent link to this record
    http://hdl.handle.net/10754/622660
    
    Metadata
    Show full item record
    Abstract
    Efficient water splitting requires highly active, earth-abundant, and robust catalysts. Monometallic phosphides such as NiP have been shown to be active toward water splitting. Our theoretical analysis has suggested that their performance can be further enhanced by substitution with extrinsic metals, though very little work has been conducted in this area. Here we present for the first time a novel PH plasma-assisted approach to convert NiCo hydroxides into ternary NiCoP. The obtained NiCoP nanostructure supported on Ni foam shows superior catalytic activity toward the hydrogen evolution reaction (HER) with a low overpotential of 32 mV at 10 mA cm in alkaline media. Moreover, it is also capable of catalyzing the oxygen evolution reaction (OER) with high efficiency though the real active sites are surface oxides in situ formed during the catalysis. Specifically, a current density of 10 mA cm is achieved at overpotential of 280 mV. These overpotentials are among the best reported values for non-noble metal catalysts. Most importantly, when used as both the cathode and anode for overall water splitting, a current density of 10 mA cm is achieved at a cell voltage as low as 1.58 V, making NiCoP among the most efficient earth-abundant catalysts for water splitting. Moreover, our new synthetic approach can serve as a versatile route to synthesize various bimetallic or even more complex phosphides for various applications.
    Citation
    Liang H, Gandi AN, Anjum DH, Wang X, Schwingenschlögl U, et al. (2016) Plasma-Assisted Synthesis of NiCoP for Efficient Overall Water Splitting. Nano Letters 16: 7718–7725. Available: http://dx.doi.org/10.1021/acs.nanolett.6b03803.
    Sponsors
    The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
    Publisher
    American Chemical Society (ACS)
    Journal
    Nano Letters
    DOI
    10.1021/acs.nanolett.6b03803
    Additional Links
    http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.6b03803
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.nanolett.6b03803
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; Computational Physics and Materials Science (CPMS)

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