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

doi:10.1039/c4ta06642a

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 journal › Article › peer-review

121 Scopus citations

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 language	English (US)
Pages (from-to)	5420-5425
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	3
Issue number	10
DOIs	https://doi.org/10.1039/c4ta06642a
State	Published - Mar 14 2015

All Science Journal Classification (ASJC) codes

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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title = "Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis",

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.",

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

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T1 - Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis

AU - Popczun, Eric J.

AU - Roske, Christopher W.

AU - Read, Carlos G.

AU - Crompton, J. Chance

AU - McEnaney, Joshua M.

AU - Callejas, Juan F.

AU - Lewis, Nathan S.

AU - Schaak, Raymond E.

PY - 2015/3/14

Y1 - 2015/3/14

N2 - 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.

AB - 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.

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Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis

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