Study of oxygen reduction reaction kinetics on multi-walled carbon nano-tubes supported Pt–Pd catalysts under various conditions
| Autor: | Elaheh Lohrasbi, Ahmad Nozad Golikand, Mehdi Asgari |
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| Rok vydání: | 2011 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Reducing agent Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Electrolyte Condensed Matter Physics Catalysis Fuel Technology chemistry Particle size Rotating disk electrode Cyclic voltammetry Carbon Voltammetry |
| Zdroj: | International Journal of Hydrogen Energy. 36:13317-13324 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2010.05.076 |
| Popis: | Multi-walled carbon nano-tube supported Pt–Pd nanoparticles catalysts were prepared using NaBH 4 as a reducing agent in either KOH or water for use as a cathode catalyst in polymer electrolyte membrane fuel cells (PEMFCs). X-ray diffraction (XRD) showed that compared to catalyst prepared in the absence of KOH, other catalyst has smaller particle sizes. Using the resulting multi-walled carbon nano-tube supported Pt–Pd catalysts, the catalyst particle size affects on the kinetics of the oxygen reduction reaction (ORR) were analyzed using cyclic voltammetry (CV) and rotating disk electrode (RDE) voltammetry. From RDE voltammetric studies, it was found that for both catalysts; the number of electrons, n, involved in the ORR was nearly four at potential 0.3 V versus Ag/AgCl (3 M KCl). Results also showed that the 2-step four electron reduction of O 2 to H 2 O precede more favorably on the catalyst with smaller particle size. |
| Databáze: | OpenAIRE |
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