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Synthesis of Size‐Controlled Ag@Co@Ni/Graphene Core–Shell Nanoparticles for the Catalytic Hydrolysis of Ammonia Borane
Author(s) -
Qiu Fangyuan,
Li Li,
Liu Guang,
Xu Changchang,
An Cuihua,
Xu Yanan,
Wang Ying,
Huang Yanan,
Chen Chengcheng,
Wang Yijing,
Jiao Lifang,
Yuan Huatang
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201301034
Subject(s) - ammonia borane , particle size , catalysis , graphene , nanoparticle , hydrolysis , chemical engineering , steric effects , ammonia , borane , materials science , particle (ecology) , chemistry , ammonia production , inorganic chemistry , nanotechnology , organic chemistry , hydrogen production , oceanography , geology , engineering
Size‐controlled Ag 0.04 @Co 0.48 @Ni 0.48 core–shell nanoparticles (NPs) were synthesized by employing graphene (rGO) with different reduction degrees as supports. The number of CO and CO functional groups on the surface of rGO might play a major role in controlling the particle size. The strong steric‐hindrance effect of CO resulted in the growth of large particles, whereas CO contributed to the formation of small particles. The particle size of Ag 0.04 @Co 0.48 @Ni 0.48 NPs supported on rGO with different reduction degrees decreased as the number of CO functional groups decreased. The decrease in the particle size probably led to the increase in the catalytic activity towards the hydrolysis of ammonia borane (AB). The enhanced catalytic activity largely stemmed from the increasing active sites on the surface of catalysts owing to the decreasing particle size.