期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 2, 页码 693-697出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201509616
关键词
electrocatalysis; nanosheets; nickel; single crystals; ultrathin films
资金
- National Natural Science Foundation of China
- 973 Program [2011CBA00503, 2011CB932403]
- Program for Changjiang Scholars and Innovative Research Team in the University
Simultaneously synthesizing and structuring atomically thick or ultrathin 2D non-precious metal nanocrystal may offer a new class of materials to replace the state-of-art noblemetal electrocatalysts; however, the synthetic strategy is the bottleneck which should be urgently solved. Here we report the synthesis of an ultrathin nickel nanosheet array (Ni-NSA) through in situ topotactic reduction from Ni(OH) 2 array precursors. The Ni nanosheets showed a single-crystalline lamellar structure with only ten atomic layers in thickness and an exposed (111) facet. Combined with a superaerophobic (low bubble adhesive) arrayed structure the Ni-NSAs exhibited a dramatic enhancement on both activity and stability towards the hydrazine-oxidation reaction (HzOR) relative to platinum. Furthermore, the partial oxidization of Ni-NSAs in ambient atmosphere resulted in effective water-splitting electrocatalysts for the hydrogen-evolution reaction (HER).
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