Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 10, Pages 5420-5425Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta06642a
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Funding
- National Science Foundation (NSF) Center for Chemical Innovation on Solar Fuels [CHE-1305124]
- Caltech by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub - Office of Science of the U.S. Department of Energy [DE-SC0004993]
- Gordon and Betty Moore Foundation
- NSF
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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 similar to 1 mg cm(-2) on Ti electrodes required an overpotential of -117 mV to produce a current density of similar to 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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