期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 23, 页码 9204-9212出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta00945j
关键词
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资金
- National Natural Science Foundation (NSFC) [21271163, U1232211]
- CAS/SAFEA International Partnership Program for Creative Research Teams
- CAS Hefei Science Center
The oxygen evolution reaction (OER) is a key half reaction involved in electrochemical water splitting. However, it is kinetically not favored and hence requires highly active electrocatalysts. Non-precious metal based catalysts have emerged as the most promising materials for the replacement of state-of-the-art noble metal catalysts. However, more progress is still needed to improve the activity and stability of these catalysts. Herein, we synthesized Co3ZnC/Co nanojunctions encapsulated in highly nitrogen doped graphene layers by one-step annealing of Prussian blue analogues (PBA). The catalyst shows a low overpotential of only 366 mV at 10 mA cm(-2), which is superior to state-of-the-art commercial RuO2 catalysts. Besides, it exhibits a better performance compared with similar metallic carbide-based catalysts towards ORR with an onset potential and cathodic peak potential at 0.912 V and 0.814 V, respectively.
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