期刊
CHEMSUSCHEM
卷 13, 期 18, 页码 4911-4915出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202001229
关键词
density functional theory; electrocatalysis; iron; oxygen evolution; phase boundaries
资金
- Qingdao Innovation Leading Talent Program
- Natural Science Foundation of China [51173087]
- China Postdoctoral Science Foundation [2018M630753]
- Natural Science Foundation of Shandong Province [ZR2018BEM006]
- Qingdao Postdoctoral Application Research Project
- Taishan Scholars Program
Interface engineering has proven an effective strategy for designing high-performance water-oxidation catalysts. Interface construction combining the respective advantages of amorphous and crystalline phases, especially embedding amorphous phases in crystalline lattices, has been the focus of intensive research. This study concerns the construction of an amorphous-crystalline FeOOH phase boundary (a-c-FeOOH) by structural evolution of iron oxyhydroxide-isolated Fe(OH)(3)precursors from one-step hydrothermal synthesis. a-c-FeOOH demonstrates superb electrocatalytic activity for the oxygen evolution reaction (OER) with overpotential of 330 mV to drive a current density of 300 mA cm(-2)in 1.0 mKOH, which is among the best OER catalysts and much better than the pristine amorphous or crystalline FeOOH alone. Density functional theory calculations reveal that the high-density a-c phase boundaries play a critical role in determining high OER activity.
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