Journal
ADVANCED MATERIALS
Volume 32, Issue 21, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202000482
Keywords
amorphous; ethanol oxidation reaction; heterostructures; nanoplates
Categories
Funding
- Agency for Science, Technology and Research [A1783c0009] Funding Source: Medline
- City University of Hong Kong Funding Source: Medline
- MOE [MOE2016-T2-2-103, 2017-T1-002-119, MOE2017-T2-1-162] Funding Source: Medline
- NTU [M4081296.070.500000] Funding Source: Medline
- Hong Kong Branch of National Precious Metals Material Engineering Research Center [1886921, 9610478, 9380100] Funding Source: Medline
- ITC Funding Source: Medline
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Phase engineering of nanomaterials (PEN) offers a promising route to rationally tune the physicochemical properties of nanomaterials and further enhance their performance in various applications. However, it remains a great challenge to construct well-defined crystalline@amorphous core-shell heterostructured nanomaterials with the same chemical components. Herein, the synthesis of binary (Pd-P) crystalline@amorphous heterostructured nanoplates using Cu3-chi P nanoplates as templates, via cation exchange, is reported. The obtained nanoplate possesses a crystalline core and an amorphous shell with the same elemental components, referred to as c-Pd-P@a-Pd-P. Moreover, the obtained c-Pd-P@a-Pd-P nanoplates can serve as templates to be further alloyed with Ni, forming ternary (Pd-Ni-P) crystalline@amorphous heterostructured nanoplates, referred to as c-Pd-Ni-P@a-Pd-Ni-P. The atomic content of Ni in the c-Pd-Ni-P@a-Pd-Ni-P nanoplates can be tuned in the range from 9.47 to 38.61 at%. When used as a catalyst, the c-Pd-Ni-P@a-Pd-Ni-P nanoplates with 9.47 at% Ni exhibit excellent electrocatalytic activity toward ethanol oxidation, showing a high mass current density up to 3.05 A mg(Pd)(-1), which is 4.5 times that of the commercial Pd/C catalyst (0.68 A mg(Pd)(-1)).
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