Journal
ACS CATALYSIS
Volume 5, Issue 1, Pages 145-149Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs5014943
Keywords
tungsten phosphide; submicroparticles; hydrogen evolution reaction; electrocatalysts; water splitting
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Funding
- National Natural Science Foundation of China [21175129]
- National Basic Research Program of China [2011CB935800]
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The development of high-efficiency non-noble-metal hydrogen evolution reaction (HER) electrocatalysts operating at all pH values is highly desired but still remains a challenge. In this letter, we report on developing tungsten phosphide submicroparticles as a high-efficiency HER catalyst with high durability for electrochemical hydrogen generation in acidic water. This catalyst shows a low onset overpotential of 54 mV, a Tafel slope of 57 mV/dec, an exchange current density of 0.017 mA/cm(2), and nearly 100% Faradaic efficiency. It needs overpotentials of 115 and 161 mV to afford current densities of 2 and 10 mA/cm(2), respectively. Moreover, this catalyst is also good in activity and durability under neutral and basic conditions.
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