Highly Active Electrocatalysis of the Hydrogen Evolution Reaction by Cobalt Phosphide Nanoparticles
説明
<jats:title>Abstract</jats:title><jats:p>Nanoparticles of cobalt phosphide, CoP, have been prepared and evaluated as electrocatalysts for the hydrogen evolution reaction (HER) under strongly acidic conditions (0.50 <jats:sc>M</jats:sc> H<jats:sub>2</jats:sub>SO<jats:sub>4</jats:sub>, 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<jats:sup>−2</jats:sup> mass loading) produced a cathodic current density of 20 mA cm<jats:sup>−2</jats:sup> at an overpotential of −85 mV. The CoP/Ti electrodes were stable over 24 h of sustained hydrogen production in 0.50 <jats:sc>M</jats:sc> H<jats:sub>2</jats:sub>SO<jats:sub>4</jats:sub>. 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.</jats:p>
収録刊行物
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- Angewandte Chemie International Edition
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Angewandte Chemie International Edition 53 (21), 5427-5430, 2014-04-11
Wiley