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Soft Template‐Directed Reactions: One‐Pot Synthetic Route for Bimetallic Core–Satellite–Shell Structured Electrocatalytic Nanospheres
Author(s) -
He Yue,
Wang Qin,
Wei Zhen,
Xu Ling,
Wang Zenglin,
Huang Hao,
Jiao Huan
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201800346
Subject(s) - tafel equation , bimetallic strip , catalysis , nanoparticle , electrolyte , chemical engineering , materials science , nanotechnology , electrocatalyst , chemistry , electrochemistry , electrode , organic chemistry , engineering
A one‐pot synthesis strategy, which retards nanoparticle (NP) agglomeration in the initiation of reaction and prevents the combination of the core and small species, is reported. In the present study, we synthesize bimetallic core–shell structures of single Au cores and satellites‐like Pt NPs. The core was generated by using HAuCl 4 ; thus, providing the unique conductive ability for electrons. The entire evolution process of Pt NPs during the whole reaction was confined within the SiO 2 nanospheres. Through strong electrostatic attraction, the Pt NPs in a tight H 3 O + packing accordingly increased the adsorbed hydrogen (H ad ) rate. The comparative investigation of electrocatalytic activities of the products and commercial Pt/C‐20 % in the hydrogen evolution reaction (HER) revealed that the Au@SiO 2 ‐Pt, with a strong metal interaction effect in the electrolyte, exhibits a low Tafel slope of 52 mV dec −1 , with its catalytic activity being maintained for at least 10 h. Impressively, it also demonstrates a high turnover frequency (TOF) value of 0.11 s −1 .