A novel co-precipitation method for preparation of Pt-CeO2 composites on multi-walled carbon nanotubes for direct methanol fuel cells
✍ Scribed by Dao-Jun Guo; Zhi-Hong Jing
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 482 KB
- Volume
- 195
- Category
- Article
- ISSN
- 0378-7753
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✦ Synopsis
Ceria (CeO 2 ) as co-catalytic material with Pt on multi-walled carbon nanotubes (Pt-CeO 2 /MWCNT) is synthesized by a co-precipitation method. The physicochemical characterizations of the catalysts are carried out by using transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) techniques. Electrocatalytic activities of the catalysts for methanol oxidation is examined by cyclic voltammetry and chronoamperometry techniques and it is found that Pt-CeO 2 /MWCNT catalysts exhibited a better activity and stability than did the unmodified Pt/MWCNT catalyst. CO-stripping results indicate the facile removal of intermediate poisoning species CO in the presence of CeO 2 , which is helpful for CO and methanol electro-oxidation.