期刊
ADVANCED MATERIALS
卷 32, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201902964
关键词
amorphization; electrocatalysis; ligand exchange; Pd nanomaterials
类别
资金
- MOE [MOE2015-T2-2-057, MOE2016-T2-2-103, MOE2017-T2-1-162, 2016-T1-002-051, 2017-T1-001-150, 2017-T1-002-119]
- NTU in Singapore [M4081296.070.500000]
- ITC via Hong Kong Branch of National Precious Metals Material Engineering Research Center
- City University of Hong Kong
- U.S. DOE [DE-AC02-06CH11357]
- Canadian Light Source
- DOE Office of Science [DE-SC0012704]
Various kinds of amorphous materials, such as transition metal dichalcogenides, metal oxides, and metal phosphates, have demonstrated superior electrocatalytic performance compared with their crystalline counterparts. Compared to other materials for electrocatalysis, noble metals exhibit intrinsically high activity and excellent durability. However, it is still very challenging to prepare amorphous noble-metal nanomaterials due to the strong interatomic metallic bonding. Herein, the discovery of a unique thiol molecule is reported, namely bismuthiol I, which can induce the transformation of Pd nanomaterials from face-centered-cubic (fcc) phase into amorphous phase without destroying their integrity. This ligand-induced amorphization is realized by post-synthetic ligand exchange under ambient conditions, and is applicable to fcc Pd nanomaterials with different capping ligands. Importantly, the obtained amorphous Pd nanoparticles exhibit remarkably enhanced activity and excellent stability toward electrocatalytic hydrogen evolution in acidic solution. This work provides a facile and effective method for preparing amorphous Pd nanomaterials, and demonstrates their promising electrocatalytic application.
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