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Worm-Like Palladium/Carbon Core−Shell Nanocomposites: One-Step Hydrothermal Reduction−Carbonization Synthesis and Electrocatalytic Activity

Worm-like palladium/carbon (Pd/C) core−shell nanocomposites have been hydrothermally prepared starting from PdCl2 and α-lactose monohydrate (α-LM) in the presence of polyacrylamide (PAM) at 200 °C. The thickness of carbonaceous shells varied from 5 to 45 nm with increasing temperature from 140 to 20...

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Published in:Journal of physical chemistry. C 2011-04, Vol.115 (14), p.6250-6256
Main Authors: Kang, Wenjun, Li, Haibo, Yan, Yan, Xiao, Peipei, Zhu, Lingling, Tang, Kaibin, Zhu, Yongchun, Qian, Yitai
Format: Article
Language:English
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Summary:Worm-like palladium/carbon (Pd/C) core−shell nanocomposites have been hydrothermally prepared starting from PdCl2 and α-lactose monohydrate (α-LM) in the presence of polyacrylamide (PAM) at 200 °C. The thickness of carbonaceous shells varied from 5 to 45 nm with increasing temperature from 140 to 200 °C. When the dose of PAM or PdCl2 was increased, spherical Pd/C core−shell nanocomposites were obtained. Time-dependent experiments confirmed that formation of Pd/C core−shell nanocomposites underwent an entrapment−reduction−carbonization process. Such a route has also been extended to synthesize spherical Ag/C core−shell composites. A cyclic voltammetry (CV) study reveals that the as-prepared Pd/C core−shell nanocomposites exhibit electrocatalytic activity toward oxidation of ascorbic acid (AA).
ISSN:1932-7447
1932-7455
DOI:10.1021/jp111702s