Interfacial Water at a CO-Predosed Platinum Electrode: A Surface Enhanced Infrared Study with Strong Hydrogen Evolution Reaction Control
| Autor: | Andreas Bund, Yan-Gang Yan, Wen-Bin Cai, Bin Peng, Yao-Yue Yang, Ulrich Stimming |
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| Rok vydání: | 2011 |
| Předmět: |
Stripping (chemistry)
Infrared Analytical chemistry Infrared spectroscopy chemistry.chemical_element Spectral line Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy chemistry Attenuated total reflection Electrode Physical and Theoretical Chemistry Spectroscopy Platinum |
| Zdroj: | The Journal of Physical Chemistry C. 115:5584-5592 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp104180n |
| Popis: | Attenuated total reflection surface-enhanced infrared absorption spectroscopy, in conjunction with Gram−Schmidt intensity response and 2-dimensional correlation IR analyses, has been extended to study the structure and interaction of interfacial H2O at a CO-predosed platinum electrode in 0.1 M HClO4 with its potential navigated from the double-layer region to the strong hydrogen evolution reaction (HER) region. The strong HER enables at least part of the outer interfacial H2O layers to be effectively expelled by tremendous amounts of H2 bubbles dynamically formed on the Pt surface. The H2 bubbles could effectively survive during a fairly fast potential excursion to a positive limit for CO stripping at which a single-beam spectrum was then acquired and used as the reference, facilitating the analysis of “quasi-absolute” spectra of the initial interfacial H2O and CO at the Pt electrode prior to the significant HER. As a result, the broad νOH band may be deconvoluted into four peaks at ca. 3630, 3550, 3250, ... |
| Databáze: | OpenAIRE |
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