Abstract
Pt/C catalysts with narrow size distribution and high dispersion were prepared by NaBH4 and ethylene glycol (EG) reduction methods, separately, using EG as both the solvent and stabilizing agent. Their morphology, composition, structure and electrochemically active specific surface area (ECSA) were characterized and compared. Electrocatalytic activities of the two catalysts for oxidation of methanol or ethanol were tested. The two catalysts present narrow size distribution, high dispersion, face centred cubic structure of Pt, and comparative Pt-mass based activities for electro-oxidation of methanol and ethanol. The Pt/C catalyst prepared by NaBH4 reduction method has more metallic Pt (Pt°) and more crystal face Pt (220), its Pt electrochemical surface area (Pt ECAS) based anodic peak current densities for methanol and ethanol oxidations are 0.68 and 0.67 mA/cm2, 1.2 times higher than those of the Pt/C catalyst prepared by EG reduction method, respectively. Their electrocatalytic activities for methanol and ethanol are comparable with those of commercial E-TEK catalysts.
| Original language | English |
|---|---|
| Pages (from-to) | 1198-1203 |
| Number of pages | 6 |
| Journal | Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering |
| Volume | 9 |
| Issue number | 6 |
| Publication status | Published - Dec 2009 |
Keywords
- Catalyst
- Ethylene glycol
- Fuel cell
- NaBH
- Pt/C