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Highly Active Electrocatalysis of the Hydrogen Evolution Reaction by Cobalt Phosphide Nanoparticles

Popczun, Eric J. and Read, Carlos G. and Roske, Christopher W. and Lewis, Nathan S. and Schaak, Raymond E. (2014) Highly Active Electrocatalysis of the Hydrogen Evolution Reaction by Cobalt Phosphide Nanoparticles. Angewandte Chemie International Edition, 53 (21). pp. 5427-5430. ISSN 1433-7851. doi:10.1002/anie.201402646.

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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 H_2SO_4, 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 H_2SO_4. 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.

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URLURL TypeDescription ItemSupporting Information
Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 2014 Wiley-VCH Verlag GmbH & Co. Received: February 20, 2014; Published online: April 11, 2014. This work was supported by the National Science Foundation (NSF) Center for Chemical Innovation on Solar Fuels (CHE-1305124). C.W.R. thanks the NSF for a graduate research fellowship. Research was in part performed at the Beckman Institute Molecular Materials Research Center. TEM and BET data were acquired using facilities in the Materials Characterization Lab of the Penn State Materials Research Institute. E.J.P. and C.G.R. thank Trevor Clark, Ke Wang, and Lymaris Ortiz Rivera for assistance.
Group:CCI Solar Fuels
Funding AgencyGrant Number
NSF Center for Chemical Innovation on Solar FuelsCHE-1305124
NSF Graduate Research FellowshipUNSPECIFIED
Subject Keywords: electrocatalysis; hydrogen evolution; metal phosphide; nanomaterials; water splitting
Issue or Number:21
Record Number:CaltechAUTHORS:20140620-100535755
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Official Citation:Popczun, E. J., Read, C. G., Roske, C. W., Lewis, N. S. and Schaak, R. E. (2014), Highly Active Electrocatalysis of the Hydrogen Evolution Reaction by Cobalt Phosphide Nanoparticles. Angew. Chem. Int. Ed., 53: 5427–5430. doi: 10.1002/anie.201402646
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46395
Deposited By: Ruth Sustaita
Deposited On:20 Jun 2014 17:24
Last Modified:10 Nov 2021 17:24

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