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Methanol electro-oxidation on carbon-supported and Pt-modified Au nanoparticles

✍ Scribed by In-Su Park; Kug-Seung Lee; Yoon-Hwan Cho; Hee-Young Park; Yung-Eun Sung

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
526 KB
Volume
132
Category
Article
ISSN
0920-5861

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✦ Synopsis

Methanol electro-oxidation on Pt-modified Au nanoparticles was studied in aqueous 0.5 M H 2 SO 4 /1 M CH 3 OH. The Pt-modified Au nanoparticles showed lower values than pure Pt nanoparticles in area-specific current densities. The activity also decreased with lower amounts of Pt on the Pt-modified Au nanoparticles. This result indicates that the intrinsic activities of the Pt-modified Au nanoparticles were lower than that of Pt/C. This phenomenon may be due to the strengthened Pt-CO bonding or the weakened ensemble effect in the methanol electro-oxidation. However, in the Pt-specific current densities, the Pt-modified Au nanoparticles showed higher values than pure Pt nanoparticles. This enhanced electrocatalytic activity could be attributed to more reaction-favorable surface structures of Pt-modified Au nanoparticles, which most likely lead a high level of Pt utilization for the electro-oxidation reaction.

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