Journal of Nanoparticle Research

, Volume 9, Issue 6, pp 1145–1151

Size effect of gold nanoparticles on the electrocatalytic oxidation of carbon monoxide in alkaline solution

Brief communication

DOI: 10.1007/s11051-007-9210-1

Cite this article as:
Geng, D. & Lu, G. J Nanopart Res (2007) 9: 1145. doi:10.1007/s11051-007-9210-1

Abstract

This paper describes preliminary findings of Au nanoparticle on glassy carbon (GC) electrodes for electro-oxidation of carbon monoxide in basic conditions. Electrochemical cyclic voltammetric results showed that CO oxidation simultaneously occurred in the anodic and cathodic sweeps during one cycle, and CO electro-oxidation activity was remarkably different in the anode for the different sized Au nanoparticles. The ultrafine catalyst metal particles (2 and 6 nm Au) were more active compared to the larger ones (12, 24 and 41 nm Au). The dependence of the activity on the particle size can be explained in terms of their effect on the number of active sites and the different surface gold oxide species.

Keywords

size effect nanoparticles electrocatalytic electro-oxidation catalyst colloids 

Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  1. 1.State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical Physics, The Chinese Academy of SciencesLanzhouP.R. China
  2. 2.Graduate University of Chinese Academy of SciencesBeijingP.R. China