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Angew Chem Int Ed Engl. 2014 May 19;53(21):5427-30. doi: 10.1002/anie.201402646. Epub 2014 Apr 11.

Highly active electrocatalysis of the hydrogen evolution reaction by cobalt phosphide nanoparticles.

Author information

1
Department of Chemistry and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802 (USA).

Abstract

Nanoparticles of cobalt phosphide, CoP, have been prepared and evaluated as electrocatalysts for the hydrogen evolution reaction (HER) under strongly acidic conditions (0.50 M H2SO4, pH 0.3). Uniform, multi-faceted CoP nanoparticles were synthesized by reacting Co nanoparticles with trioctylphosphine. Electrodes comprised of CoP nanoparticles on a Ti support (2 mg cm(-2) mass loading) produced a cathodic current density of 20 mA cm(-2) at an overpotential of -85 mV. The CoP/Ti electrodes were stable over 24 h of sustained hydrogen production in 0.50 M H2SO4. The activity was essentially unchanged after 400 cyclic voltammetric sweeps, suggesting long-term viability under operating conditions. CoP is therefore amongst the most active, acid-stable, earth-abundant HER electrocatalysts reported to date.

KEYWORDS:

electrocatalysis; hydrogen evolution; metal phosphide; nanomaterials; water splitting

PMID:
24729482
DOI:
10.1002/anie.201402646

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