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

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

Research output: Contribution to journalArticle

625 Citations (Scopus)

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 H 2SO4. 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. One step closer to Pt: Nanoparticles of cobalt phosphide (CoP) catalyze the hydrogen evolution reaction with high activity and stability under strongly acidic conditions. Its electrocatalytic performance places CoP amongst the best Earth-abundant alternatives to platinum.

Original languageEnglish
Pages (from-to)5427-5430
Number of pages4
JournalAngewandte Chemie - International Edition
Volume53
Issue number21
DOIs
Publication statusPublished - May 19 2014

Fingerprint

Electrocatalysis
Cobalt
Hydrogen
Nanoparticles
Electrocatalysts
Earth (planet)
Electrodes
Hydrogen production
Platinum
Current density
Acids

Keywords

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

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

Cite this

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.

In: Angewandte Chemie - International Edition, Vol. 53, No. 21, 19.05.2014, p. 5427-5430.

Research output: Contribution to journalArticle

Popczun, Eric J. ; Read, Carlos G. ; Roske, Christopher W. ; Lewis, Nathan S ; Schaak, Raymond E. / Highly active electrocatalysis of the hydrogen evolution reaction by cobalt phosphide nanoparticles. In: Angewandte Chemie - International Edition. 2014 ; Vol. 53, No. 21. pp. 5427-5430.
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