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Issue 10, 2015
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Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis

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Abstract

CoP nanostructures that exposed predominantly (111) crystal facets were synthesized and evaluated for performance as electrocatalysts for the hydrogen-evolution reaction (HER). The branched CoP nanostructures were synthesized by reacting cobalt(II) acetylacetonate with trioctylphosphine in the presence of trioctylphosphine oxide. Electrodes comprised of the branched CoP nanostructures deposited at a loading density of ∼1 mg cm−2 on Ti electrodes required an overpotential of −117 mV to produce a current density of −20 mA cm−2 in 0.50 M H2SO4. Hence the branched CoP nanostructures belong to the growing family of highly active non-noble-metal HER electrocatalysts. Comparisons with related CoP systems have provided insights into the impact that shape-controlled nanoparticles and nanoparticle–electrode interactions have on the activity and stability of nanostructured HER electrocatalysts.

Graphical abstract: Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis

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Publication details

The article was received on 03 Dec 2014, accepted on 15 Jan 2015 and first published on 16 Jan 2015


Article type: Paper
DOI: 10.1039/C4TA06642A
Citation: J. Mater. Chem. A, 2015,3, 5420-5425
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    Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis

    E. J. Popczun, C. W. Roske, C. G. Read, J. C. Crompton, J. M. McEnaney, J. F. Callejas, N. S. Lewis and R. E. Schaak, J. Mater. Chem. A, 2015, 3, 5420
    DOI: 10.1039/C4TA06642A

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