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Flowerlike submicrometer gold particles: Size- and surface roughness-controlled synthesis and electrochemical characterization

Published online by Cambridge University Press:  31 January 2011

Changsheng Shan
Affiliation:
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, and Graduate University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
Dongxue Han*
Affiliation:
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, and Graduate University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, People's Republic of China; and Laboratory of Analytical Chemistry, Process Chemistry Centre, Åbo Akademi University, Åbo-Turku, FI-20500, Finland
Jiangfeng Song
Affiliation:
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, and Graduate University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
Ari Ivaska
Affiliation:
Laboratory of Analytical Chemistry, Process Chemistry Centre, Åbo Akademi University, Åbo-Turku, FI-20500, Finland
Li Niu
Affiliation:
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, and Graduate University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, People's Republic of China; and Laboratory of Analytical Chemistry, Process Chemistry Centre, Åbo Akademi University, Åbo-Turku, FI-20500, Finland
*
a)Address all correspondence to this author. e-mail: dxhan@ciac.jl.cn
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Abstract

Flowerlike submicrometer gold particles were synthesized through a simple one-step method using p-diaminobenzene as a reductant in the presence of poly(sodium 4-styrenesulfonate) in aqueous solution. The particle size with diameters ranging from 267 to 725 nm could be tuned by varying the molar ratio of poly(sodium 4-styrenesulfonate) to HAuCl4, which also resulted in tunable roughness. The gold particles were confirmed by scanning electron microscopy, energy dispersive x-ray spectroscopy, x-ray diffraction, and x-ray photoelectron spectroscopy. Cyclic voltammetry showed that the specific surface area of the flowerlike particles was larger than that of sphere particles. The obtained flowerlike particles with higher surface area also exhibited higher electrocatalytic activity toward H2O2 and O2. The increase of electrocatalytic activity could be attributed to the increase of the active surface area.

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Copyright
Copyright © Materials Research Society 2010

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