Mechanistic Study of Electrooxidation of Ethanol on PtSn Nanoparticles in Alkaline and Acid Media
| Autor: | Barr Halevi, Elena A. Baranova, Monica Padilla, Plamen Atanassov, Kateryna Artyushkova |
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| Rok vydání: | 2015 |
| Předmět: |
Ethanol
Renewable Energy Sustainability and the Environment Chemistry Nanoparticle Nanotechnology Condensed Matter Physics Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis Metal chemistry.chemical_compound Electron transfer X-ray photoelectron spectroscopy visual_art Materials Chemistry visual_art.visual_art_medium Nuclear chemistry |
| Zdroj: | Journal of The Electrochemical Society. 162:H345-H351 |
| ISSN: | 1945-7111 0013-4651 |
| Popis: | In this study, we report on the structure-to-property relationship for PtSn ethanol electrooxidation catalysts in alkaline and acidenvironment. Relationship between surface chemistry, as determined by XPS and electrochemical performance in both acid andalkaline media, is facilitated by multivariate analysis. Upon transitioning from acidic to an alkaline environment, changes in thematerial structure and electrochemical reaction mechanisms are observed. Electrocatalysts containing larger particles with largerrelative amounts of metallic Pt and Sn perform better in acid indicating inner-sphere electron transfer reaction on active PtSn alloyphase. PtSn electrocatalysts containing larger amounts of oxidized Pt and Sn perform better in alkaline indicating that hydroxylspecies that are natively present on oxidized Pt and Sn are promoting an outer-sphere electron transfer.© The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative CommonsAttribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in anymedium, provided the original work is properly cited. [DOI: 10.1149/2.0401506jes] All rights reserved.Manuscript submitted January 7, 2015; revised manuscript received February 4, 2015. Published February 27, 2015. |
| Databáze: | OpenAIRE |
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