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One dimensional Ag/Au/AgCl nanocomposites stemmed from Ag nanowires for electrocatalysis of oxygen reduction

Title
One dimensional Ag/Au/AgCl nanocomposites stemmed from Ag nanowires for electrocatalysis of oxygen reduction
Authors
Shim J.H.Yang J.Kim S.-J.Lee C.Lee Y.
Ewha Authors
이종목이영미
SCOPUS Author ID
이종목scopus; 이영미scopus
Issue Date
2012
Journal Title
Journal of Materials Chemistry
ISSN
0959-9428JCR Link
Citation
vol. 22, no. 30, pp. 15285 - 15290
Indexed
SCOPUS WOS scopus
Abstract
This paper reports the synthesis and characterization of one dimensional nanocomposites composed of Ag, Au, and AgCl (denoted as Ag/Au/AgCl). The Ag/Au/AgCl composites with different compositional ratios are prepared by the galvanic replacement reaction between a Ag nanowire template and Au precursor at various concentrations (1, 10, 100 mM HAuCl 4). As the Au precursor concentration increases, the structure of the resulting Ag/Au/AgCl changes from a core-shell solid wire to a porous hollow wire with a decrease in the Ag and AgCl contents and increase in the Au content. The catalytic activity of Ag/Au/AgCl for the oxygen reduction reaction (ORR) is investigated in 0.1 M NaOH solution. The nanocomposite with a Ag:Au:AgCl compositional ratio of 4:86:10 shows reasonable ORR activity (high ORR current, positive onset potential) along with sufficient stability and ethanol tolerance in alkaline media, suggesting that it could be used as a substitute for Pt-based cathode catalysts in fuel cells. This journal is © The Royal Society of Chemistry 2012.
DOI
10.1039/c2jm31128c
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자연과학대학 > 화학·나노과학전공 > Journal papers
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