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Synthesis of Triple‐Layered Ag@Co@Ni Core–Shell Nanoparticles for the Catalytic Dehydrogenation of Ammonia Borane
Author(s) -
Qiu Fangyuan,
Liu Guang,
Li Li,
Wang Ying,
Xu Changchang,
An Cuihua,
Chen Chengcheng,
Xu Yanan,
Huang Yanan,
Wang Yijing,
Jiao Lifang,
Yuan Huatang
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201302943
Subject(s) - ammonia borane , bimetallic strip , cobalt , catalysis , nickel , dehydrogenation , nanoparticle , materials science , shell (structure) , chemical engineering , transition metal , inorganic chemistry , chemistry , nanotechnology , metallurgy , composite material , organic chemistry , engineering
Triple‐layered Ag@Co@Ni core–shell nanoparticles (NPs) containing a silver core, a cobalt inner shell, and a nickel outer shell were formed by an in situ chemical reduction method. The thickness of the double shells varied with different cobalt and nickel contents. Ag 0.04 @Co 0.48 @Ni 0.48 showed the most distinct core–shell structure. Compared with its bimetallic core–shell counterparts, this catalyst showed higher catalytic activity for the hydrolysis of NH 3 BH 3 (AB). The synergetic interaction between Co and Ni in Ag 0.04 @Co 0.48 @Ni 0.48 NPs may play a critical role in the enhanced catalytic activity. Furthermore, cobalt–nickel double shells surrounding the silver core in the special triple‐layered core–shell structure provided increasing amounts of active sites on the surface to facilitate the catalytic reaction. These promising catalysts may lead to applications for AB in the field of fuel cells.