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

Popczun, Eric J.; Read, Carlos G.; Roske, Christopher W.; Lewis, Nathan S.; Schaak, Raymond E.

doi:10.1002/anie.201402646

Cited by 1,240Electrocatalysts for Energy ConversionCO2 Reduction Techniques and CatalystsHydrogen Storage and Materials

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

Popczun, Eric J., Read, Carlos G., Roske, Christopher W., Lewis, Nathan S., Schaak, Raymond E.·2014·Angewandte Chemie International Edition

DOI 10.1002/anie.201402646

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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.

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The Co 2p peaks at 779.0 eV and 793.7 eV are assigned to Co 2p3/2 and Co 2p1/2, attributed to CoP.
“the two peaks at 779.0 eV and 793.7 eV are assigned to Co 2p3/2 and Co 2p1/2, respectively, which are attributed to the binding energies of Co 2p in CoP.38,39”
From M X P(M = Co/Ni)@carbon core–shell nanoparticles embedded in 3D cross-linked graphene aerogel derived from seaweed biomass for hydrogen evolution reaction (2018) · cites this paper as [38]
The geometrical exchange current density j0,geometrical for Ni/GD (0.25 mA cm-2) and Fe/GD (0.29 mA cm-2) are much larger than reported ACs such as Ni-doped graphene (5.3 × 10-2 mA cm-2) and most bulk HER catalysts such as CoP (0.14 mA cm-2).
“The j0,geometrical for Ni/GD (0.25 mA cm–2) and Fe/GD (0.29 mA cm–2) are much larger than reported ACs [e.g., Ni-doped graphene (5.3 × 10–2 mA cm–2)8] and most of the bulk HER catalysts such as CoP (0.14 mA cm–2)48 (Supplementary Table 4), revealing the exceptional intrinsic HER activities of Fe/GD and Ni/GD ACs.”
From Anchoring zero valence single atoms of nickel and iron on graphdiyne for hydrogen evolution (2018) · cites this paper as [48]
The Tafel slope values of Fe/GD and Ni/GD are superior to all reported nonprecious single-atom catalysts and most state-of-the-art HER catalysts such as CoP (50 mV dec-1).
“These values are superior to all reported nonprecious single-atom catalysts and most of the state-of-the-art HER catalysts such as CoP (50 mV dec–1)48 (Supplementary Tables 3 and 4).”
From Anchoring zero valence single atoms of nickel and iron on graphdiyne for hydrogen evolution (2018) · cites this paper as [48]

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Authors: Popczun, E. J., Read, C. G., Roske, C. W., Lewis, N. S., & Schaak, R. E.
Affiliations: Pennsylvania State University (US)
California Institute of Technology (US)
Corresponding author: Lewis, Nathan S.
Schaak, Raymond E.
ORCID: Popczun, Eric J.
Lewis, Nathan S.
Schaak, Raymond E.
Venue: Angewandte Chemie International Edition
Publisher: Wiley
Published: 2014-04-11
Volume: 53
Issue: 21
Pages: 5427-5430
ISSN: 1433-7851 (ISSN-L)
1521-3773
DOI: 10.1002/anie.201402646
OpenAlex: W2114572722
Cited by: 1,240
References: 31
Citations by year: 2026: 35 · 2025: 30 · 2024: 59 · 2023: 58 · 2022: 64 · 2021: 99 · 2020: 119 · 2019: 152 · 2018: 141 · 2017: 146 · 2016: 147 · 2015: 142 · 2014: 48
FWCI: 53.04
Type: journal article
Language: en
Open access: closed
Licence: onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations: Angewandte Chemie International Edition (publishedVersion)
PubMed (publishedVersion)
CaltechAUTHORS (California Institute of Technology) (submittedVersion)
Topics: Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
Physical Sciences › Materials Science › Materials Chemistry › Hydrogen Storage and Materials
Keywords: cobalt phosphide, hydrogen evolution reaction, electrocatalysis, acidic electrocatalysts, sulfuric acid, trioctylphosphine, cobalt nanoparticles, titanium support, earth-abundant catalysts, catalyst stability, hydrogen production

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

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