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In situ time-resolved HEROS study of Pt electronic structure during regenerative H2-O2 cycles
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
2015 (Swedish)In: Recycl. Catal., Vol. 2, 23-26 p.Article in journal (Refereed) Published
Abstract [en]

We report an in situ time-resolved high-energy resolution off-resonant spectroscopy (HEROS) study with unprecedented 100 ms time resolution revealing the unoccupied electronic states of platinum during regenerative oxidation and reduction cycles. The study depicted a slowed oxidation step in comparison with reduction. The oxidation cycle is composed of two characteristic stages, namely adsorption of dissociated oxygen followed by partial oxidation of Pt subsurface. Besides improved temporal resolution of the experiment, the detected reduction process of platinum showed no intermediate features and was completed in a single step within a few seconds.

Place, publisher, year, edition, pages
2015. Vol. 2, 23-26 p.
National Category
Physical Chemistry
Research subject
Chemistry with specialization in Physical Chemistry
URN: urn:nbn:se:uu:diva-303846DOI: DOI: 10.1515/recat-2015-0004OAI: oai:DiVA.org:uu-303846DiVA: diva2:974194
Available from: 2016-09-25 Created: 2016-09-25 Last updated: 2016-09-25

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Sá, Jacinto
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