Size effect of gold nanoparticles on the electrocatalytic oxidation of carbon monoxide in alkaline solution
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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.
Keywordssize effect nanoparticles electrocatalytic electro-oxidation catalyst colloids
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The 973 (G20000264) Research Fund is acknowledged for its support of the research.
- Burke L.D., Nugent P.F. 1997 The electrochemistry of gold: I The redox behaviour of the metal in aqueous media. Gold Bull. 30(2): 43–53Google Scholar
- Burke L.D., Nugent P.F. 1998 The electrochemistry of gold: II The electrocatalytic behaviour of the metal in aqueous media. Gold Bull. 31(2): 39–50Google Scholar
- Frens G. 1973 Controlled nucleation for the regulation of the particle size in monodisperse gold suspensions. Nat. Phys. Sci. 241: 20–22Google Scholar
- Lou, Y., M.M. Maye, L. Han, J. Luo & C.J. Zhong, 2001. Gold–platinum alloy nanoparticle assembly as catalyst for methanol electrooxidation. Chem. Commun. 5, 473–474Google Scholar
- Takasu, Y., H. Itaya, T. Iwazaki, R. Miyoshi, T. Ohnuma, W.␣Sugimoto & Y. Murakami, 2001. Size effects of ultrafine Pt–Ru particles on the electrocatalytic oxidation of methanol. Chem. Commun. 4, 341–342Google Scholar