Issue 23, 2013

One-pot synthesis of Au@Pd/graphene nanostructures: electrocatalytic ethanoloxidation for direct alcoholfuel cells (DAFCs)

Abstract

Surfactant-free bimetallic Au@Pd core-shell NPs on graphene sheets were fabricated from Au, Pd ions and graphene oxide by one-step reduction using ascorbic acid as an eco-friendly reducing agent. Au@Pd NPs with about 7 nm size are evenly distributed on the surface of graphene. The core/shell structures were confirmed with X-ray diffraction (XRD) and High-angle annual dark field scanning transmission microscopy (HAADF-STEM) mapping analysis. Prepared Au@Pd/graphene nanocomposites show an excellent electrocatalytic activity toward ethanol oxidation: If value that was the best for our catalysts is 11.6 A mg−1, which is about 5 times as high as that of the previous catalyst. The data resulted from extremely optimized bimetallic structure of a small Au core and a thin Pd shell. Pd atoms are constantly encouraged by adjacent Au atoms.

Graphical abstract: One-pot synthesis of Au@Pd/graphene nanostructures: electrocatalytic ethanol oxidation for direct alcohol fuel cells (DAFCs)

Supplementary files

Article information

Article type
Paper
Submitted
29 Jan 2013
Accepted
28 Mar 2013
First published
02 Apr 2013

RSC Adv., 2013,3, 8864-8870

One-pot synthesis of Au@Pd/graphene nanostructures: electrocatalytic ethanol oxidation for direct alcohol fuel cells (DAFCs)

G. H. Jeong, D. Choi, M. Kang, J. Shin, J. Kang and S. Kim, RSC Adv., 2013, 3, 8864 DOI: 10.1039/C3RA40505B

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