Electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidation
Direct alcohol fuel cells (DAFCs) are widely regarded as one of the most promising among the futuristic and capable energy systems; direct liquid fuel cells (DLFCs). In this article, we discuss in detail the competency of palladium nanoparticles developed over carbon-ceria composite supports (Pd/C-C...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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RSC Publications
2019
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| Online Access: | http://hdl.handle.net/20.500.11937/74591 |
| _version_ | 1848763318082207744 |
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| author | Sankar, S. Watanabe, N. Anilkumar, G. Nair, Balagopal Sivakamiammal, S. Tamaki, T. Yamaguchi, T. |
| author_facet | Sankar, S. Watanabe, N. Anilkumar, G. Nair, Balagopal Sivakamiammal, S. Tamaki, T. Yamaguchi, T. |
| author_sort | Sankar, S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Direct alcohol fuel cells (DAFCs) are widely regarded as one of the most promising among the futuristic and capable energy systems; direct liquid fuel cells (DLFCs). In this article, we discuss in detail the competency of palladium nanoparticles developed over carbon-ceria composite supports (Pd/C-CeO2) as efficient and durable anode catalysts for the alkaline electro-oxidation of ethylene glycol (EGOR). For the first time, a systematic assessment of the EGOR performance of palladium catalysts with varying Pd-ceria ratios has been reported. The scalable solid-solution route reduction technique enabled the processing of Pd nanoparticles with controlled morphology, size and excellent CeO2 interaction. The structural features of the prepared catalysts were studied using X-ray diffraction, electron microscopy (TEM) and X-ray photon spectroscopy techniques, while the electrochemical performance of the catalysts was analyzed using cyclic voltammetry and chronoamperometry. During alkaline EGOR, the Pd/C-CeO2 catalysts showed an enhanced current density (as high as 68.5 mA cm-2), more negative onset potential, excellent mass activity (4.6 A mg-1Pd) and exceptional durability compared to Pd/C. The enhanced alkaline EGOR kinetics of the Pd/C-CeO2 catalysts is well attributed to the promotion effect of CeO2 on Pd by creating more Pd-OHads and also improved tolerance to poisoning species on the Pd surface. Further, the enhanced ECSA of Pd/C-CeO2 has also aided the excellent EGOR activity in alkaline medium. The validated enhanced oxidation ability of these Pd/C-CeO2 catalysts for the anodic oxidation of other low molecular weight alcohol fuels including methanol and ethanol showcased their application potential toward DMFCs and DEFCs. |
| first_indexed | 2025-11-14T11:01:33Z |
| format | Journal Article |
| id | curtin-20.500.11937-74591 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:01:33Z |
| publishDate | 2019 |
| publisher | RSC Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-745912020-01-06T08:33:04Z Electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidation Sankar, S. Watanabe, N. Anilkumar, G. Nair, Balagopal Sivakamiammal, S. Tamaki, T. Yamaguchi, T. Direct alcohol fuel cells (DAFCs) are widely regarded as one of the most promising among the futuristic and capable energy systems; direct liquid fuel cells (DLFCs). In this article, we discuss in detail the competency of palladium nanoparticles developed over carbon-ceria composite supports (Pd/C-CeO2) as efficient and durable anode catalysts for the alkaline electro-oxidation of ethylene glycol (EGOR). For the first time, a systematic assessment of the EGOR performance of palladium catalysts with varying Pd-ceria ratios has been reported. The scalable solid-solution route reduction technique enabled the processing of Pd nanoparticles with controlled morphology, size and excellent CeO2 interaction. The structural features of the prepared catalysts were studied using X-ray diffraction, electron microscopy (TEM) and X-ray photon spectroscopy techniques, while the electrochemical performance of the catalysts was analyzed using cyclic voltammetry and chronoamperometry. During alkaline EGOR, the Pd/C-CeO2 catalysts showed an enhanced current density (as high as 68.5 mA cm-2), more negative onset potential, excellent mass activity (4.6 A mg-1Pd) and exceptional durability compared to Pd/C. The enhanced alkaline EGOR kinetics of the Pd/C-CeO2 catalysts is well attributed to the promotion effect of CeO2 on Pd by creating more Pd-OHads and also improved tolerance to poisoning species on the Pd surface. Further, the enhanced ECSA of Pd/C-CeO2 has also aided the excellent EGOR activity in alkaline medium. The validated enhanced oxidation ability of these Pd/C-CeO2 catalysts for the anodic oxidation of other low molecular weight alcohol fuels including methanol and ethanol showcased their application potential toward DMFCs and DEFCs. 2019 Journal Article http://hdl.handle.net/20.500.11937/74591 10.1039/c8cy02232a RSC Publications fulltext |
| spellingShingle | Sankar, S. Watanabe, N. Anilkumar, G. Nair, Balagopal Sivakamiammal, S. Tamaki, T. Yamaguchi, T. Electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidation |
| title | Electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidation |
| title_full | Electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidation |
| title_fullStr | Electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidation |
| title_full_unstemmed | Electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidation |
| title_short | Electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidation |
| title_sort | electro-oxidation competency of palladium nanocatalysts over ceria-carbon composite supports during alkaline ethylene glycol oxidation |
| url | http://hdl.handle.net/20.500.11937/74591 |