Temperature-induced ordering of metal/adsorbate structures at electrochemical interfaces.

Journal Article · Thu Jan 01 04:00:00 EST 2009 · J. Am. Chem. Soc.

DOI:https://doi.org/10.1021/ja9014666· OSTI ID:960362

Lucas, C A; Thompson, P; Cormack, M; Brownrigg, A; Fowler, B; Strmcnik, D; Stamenkovic, V; Greeley, J; Menzel, A; You, H; Markovic, N M

The influence of temperature changes in water-based electrolytes on the atomic structure at the electrochemical interface has been studied using in situ surface X-ray scattering (SXS) in combination with cyclic voltammetry. Results are presented for the potential-dependent surface reconstruction of Au(100), the adsorption and ordering of bromide anions on the Au(100) surface, and the adsorption and oxidation of CO on Pt(111) in pure HClO{sub 4} and in the presence of anions. These systems represent a range of structural phenomena, namely metal surface restructuring and ordering transitions in both nonreactive spectator species and reactive adsorbate layers. The key effect of temperature appears to be in controlling the kinetics of the surface reactions that involve oxygenated species, such as hydroxyl adsorption and oxide formation. The results indicate that temperature effects should be considered in the determination of structure-function relationships in many important electrochemical systems.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 960362
• Report Number(s): ANL/MSD/JA-64073
• Journal Information: J. Am. Chem. Soc., Journal Name: J. Am. Chem. Soc. Journal Issue: 2009 Vol. 131; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ADSORPTION
BROMIDES
CARBON MONOXIDE
ELECTROCHEMISTRY
ELECTROLYTES
GOLD
INTERFACES
KINETICS
ORDER PARAMETERS
OXIDATION
PLATINUM
SORPTIVE PROPERTIES
TEMPERATURE DEPENDENCE