The catalytic oxidation of carbon monoxide at the platinum/electrolyte interface investigated by optical second harmonic generation (SHG): comparison of Pt(111) and Pt(997) electrode surfaces

Autor:	Ulrich Stimming, Udo Linke, Kaspar Andreas Friedrich, Walther Akemann
Rok vydání:	1998
Předmět:	Inorganic chemistry Analytical chemistry chemistry.chemical_element Surfaces and Interfaces Electrolyte Condensed Matter Physics Surfaces Coatings and Films Anode Catalysis Overlayer chemistry.chemical_compound Catalytic oxidation chemistry Electrode Materials Chemistry Platinum Carbon monoxide
Zdroj:	Scopus-Elsevier
ISSN:	0039-6028
DOI:	10.1016/s0039-6028(97)01043-1
Popis:	The anodic oxidation of CO on nominal Pt(111) and Pt(997) electrodes in a CO-saturated 0.1 M HClO4 electrolyte is studied by optical second harmonic generation (SHG) at a wavelength of 280 nm to monitor the CO adlayer under steady-state reaction conditions in the potential range between 50 mV and 1030 mV vs. RHE. Regarding the catalytic activity of the electrodes, two potential regimes are distinguishable: in the low potential regime, characterized by the presence of a dense CO overlayer, the reaction yield is higher on Pt(997) than on Pt(111). Positive of the overlayer stripping potential [880 mV for Pt(111) and 780 mV for Pt(997)] the Pt(997) electrode exhibits an inferior reactivity. The results confirm the structure sensitivity of anodic CO oxidation on Pt electrode surfaces.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d17e165e2855c2bf014a58d75980ead https://doi.org/10.1016/s0039-6028(97)01043-1 Zobrazit plný text záznamu Full Text from ScienceDirect