期刊
THIN SOLID FILMS
卷 584, 期 -, 页码 98-102出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2014.12.016
关键词
Carbon nanotubes; Platinum; Platinum-ruthenium; Pulse electrodeposition; Citric acid; Sulfuric acid; Methanol oxidation
类别
资金
- National Science Council Taiwan [NSC 101-2221-E-007-047-MY3]
In this study, platinumnanoparticle/carbon nanotube (Pt NP/CNT) and platinum-ruthenium nanoparticle (Pt-Ru NP/CNT) hybrid nanocatalysts were prepared by the pulse-electrodeposition method in different aqueous solutions containing citric acid (CA) or sulfuric acid (SA). The electrocatalytic properties of the Pt NP/CNT and Pt-Ru NP/CNT electrodes prepared using different aqueous solutions were investigated for methanol oxidation. The results show that the electrochemical mass activities of these hybrid nanocatalysts prepared in the CA aqueous solution were increased by factors of 1.46 and 2.77 for Pt NPs and Pt-Ru NPs, respectively, compared with those prepared in SA aqueous solutions using the same procedure. These increased mass activities are attributed to the CA playing dual roles as both a stabilizing agent and a particle size reducing agent in the aqueous solutions. The approach developed in this work enables further reductions in the particle sizes of noble-metal nanocatalysts. (C) 2014 Published by Elsevier B.V.
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