期刊
ACS OMEGA
卷 4, 期 2, 页码 4185-4191出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.8b03449
关键词
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资金
- National Natural Science Foundation of China [21703212, 21503197, 21601078]
- Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) [CUG170615]
Here, we report a stable tungsten carbide hollow microsphere (W2C-HS) electrocatalyst with robust electrocatalytic activity toward hydrogen evolution reaction fabricated from carburization of tungsten oxides at 700 degrees C with CH4/H-2 flow, which demands overpotentials of 153 and 264 mV to deliver 10 and 100 mA cm(-2) ascribing to the hollow structures beneficial for interfacial charge transfer as well as releasing of hydrogen molecular. Meanwhile, the W2C-HS electrocatalyst exhibits undetectable degradation after 20 000 potential cycles indicative of extraordinary durability; in contrast, overpotential@100 mA cm(-2) is dramatically increased from 128 to 251 mV after only 2000 potential cycles for benchmark platinum electrocatalyst.
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