期刊
GREEN ENERGY & ENVIRONMENT
卷 6, 期 2, 页码 229-235出版社
KEAI PUBLISHING LTD
DOI: 10.1016/j.gee.2020.03.007
关键词
Ionic liquid; Core-shell nanoparticles; Gold; Palladium; Ethanol oxidation reaction
类别
资金
- National Natural Science Foundation of China [21573240, 21706265, 21776292]
- National Natural Science Foundation of Beijing [2173062]
- Center for Mesoscience, Institute of Process Engineering, Chinese Academy of Sciences [MPCS-2017-A-02]
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences [MPCS-2019-A-09]
By synthesizing core-shell gold (Au)@Palladium (Pd) nanoparticles in an ionic liquid, the study combines the advantages of ionic liquids in preparing fine metal nanoparticles and core-shell structures, resulting in nanomaterials smaller than 3 nm with high activity in ethanol electrooxidation, exceeding commercial Pd/C catalysts.
To maximize the size and structural advantages of nanomaterials in electrooxidation of ethanol, we herein report the synthesis of core-shell gold (Au)@Palladium (Pd) nanoparticles smaller than 3 nm in an ionic liquid, which combines the advantages of ionic liquids in preparing fine metal nanoparticles with the benefits of core-shell nanostructures. This synthetic strategy relies on the use of an ionic liquid (1-(2'-aminoethyl)-3-methyl-imidazolum tetrafluoroborate) as a stabilizer to produce Au particles with an average size of ca. 2.41 nm, which are then served as seeds for the formation of tiny core-shell Au@Pd nanoparticles with different Au/Pd molar ratios. The strong electronic coupling between Au core and Pd shell endows the Pd shell with an electronic structure favorable for the ethanol oxidation reaction. In specific, the ionic liquid-derived core-shell Au@Pd nanoparticles at an Au/Pd molar ratio of 1/1 exhibit the highest mass- and area-based activities, approximately 11 times than those of commercial Pd/C catalyst for ethanol electrooxidation. (C) 2020, Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
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