期刊
ADVANCED MATERIALS
卷 29, 期 32, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201606570
关键词
amorphous; conductivity; electrocatalysis; oxygen evolution reaction; phosphate
类别
资金
- 973 Program [2014CB848900]
- NSFC [21471141, U1532135, U1532112, 21303251, 21573212, 11375198, 11574280, 11605201]
- Shenzhen Science and Technology Foundation [JCYJ201419122040621]
- Recruitment Program of Global Experts
- CAS Hundred Talent Program
- U.S. DOE [DE-AC02-06CH11357]
- Grants-in-Aid for Scientific Research [15K18199] Funding Source: KAKEN
The intrinsic catalytic activity at 10 mA cm(-2) for oxygen evolution reaction (OER) is currently working out at overpotentials higher than 320 mV. A highly efficient electrocatalyst should possess both active sites and high conductivity; however, the loading of powder catalysts on electrodes may often suffer from the large resistance between catalysts and current collectors. This work reports a class of bulk amorphous NiFeP materials with metallic bonds from the viewpoint of electrode design. The materials reported here perfectly combine high macroscopic conductivity with surface active sites, and can be directly used as the electrodes with active sites toward high OER activity in both alkaline and acidic electrolytes. Specifically, a low overpotential of 219 mV is achieved at the geometric current density 10 mA cm(-2) in an alkaline electrolyte, with the Tafel slope of 32 mV dec(-1) and intrinsic overpotential of 280 mV. Meanwhile, an overpotential of 540 mV at 10 mA cm(-2) is attained in an acidic electrolyte and stable for over 30 h, which is the best OER performance in both alkaline and acidic media. This work provides a different angle for the design of high-performance OER electrocatalysts and facilitates the device applications of electrocatalysts.
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