Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis

Eric J. Popczun, Christopher W. Roske, Carlos G. Read, J. Chance Crompton, Joshua M. McEnaney, Juan F. Callejas, Nathan S Lewis, Raymond E. Schaak

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Pages (from-to)5420-5425
Number of pages6
JournalJournal of Materials Chemistry A
Volume3
Issue number10
DOIs
Publication statusPublished - Mar 14 2015

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Electrocatalysis
Cobalt
Electrocatalysts
Hydrogen
Nanostructures
Electrodes
Nanoparticles
Current density
Metals
Crystals
Oxides

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Popczun, E. J., Roske, C. W., Read, C. G., Crompton, J. C., McEnaney, J. M., Callejas, J. F., ... Schaak, R. E. (2015). Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis. Journal of Materials Chemistry A, 3(10), 5420-5425. https://doi.org/10.1039/c4ta06642a

Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis. / Popczun, Eric J.; Roske, Christopher W.; Read, Carlos G.; Crompton, J. Chance; McEnaney, Joshua M.; Callejas, Juan F.; Lewis, Nathan S; Schaak, Raymond E.

In: Journal of Materials Chemistry A, Vol. 3, No. 10, 14.03.2015, p. 5420-5425.

Research output: Contribution to journalArticle

Popczun, EJ, Roske, CW, Read, CG, Crompton, JC, McEnaney, JM, Callejas, JF, Lewis, NS & Schaak, RE 2015, 'Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis', Journal of Materials Chemistry A, vol. 3, no. 10, pp. 5420-5425. https://doi.org/10.1039/c4ta06642a
Popczun EJ, Roske CW, Read CG, Crompton JC, McEnaney JM, Callejas JF et al. Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis. Journal of Materials Chemistry A. 2015 Mar 14;3(10):5420-5425. https://doi.org/10.1039/c4ta06642a
Popczun, Eric J. ; Roske, Christopher W. ; Read, Carlos G. ; Crompton, J. Chance ; McEnaney, Joshua M. ; Callejas, Juan F. ; Lewis, Nathan S ; Schaak, Raymond E. / Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis. In: Journal of Materials Chemistry A. 2015 ; Vol. 3, No. 10. pp. 5420-5425.
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