Self-oscillations and surface waves during CO oxidation over Co

Autor:	D. P. Shashkin, M.M. Slinko, V. Yu. Bychkov, A. Ya. Gorenberg, Yu. P. Tulenin, Vladimir N. Korchak
Rok vydání:	2019
Předmět:	Wavefront Reaction conditions Materials science 010405 organic chemistry Turbulence chemistry.chemical_element 010402 general chemistry 01 natural sciences Oxygen Catalysis 0104 chemical sciences Reaction rate chemistry Surface wave Chemical physics Physical and Theoretical Chemistry Cobalt
Zdroj:	Reaction Kinetics, Mechanisms and Catalysis. 128:587-598
ISSN:	1878-5204 1878-5190
DOI:	10.1007/s11144-019-01673-y
Popis:	The paper looks into the temporal and spatial dynamics of a new oscillating system comprised of CO oxidation over Co. Reaction rate oscillations occurring in CO excess were similar to the ones observed over Ni. The periodic variation of oxygen imbalance together with the variation in colour changes during the oscillations indicated that the oscillations were closely connected with the reversible oxidation of Co to various Co oxides. The periodic oxidation/reduction of cobalt proceeded as surface waves. Unexpectedly, widely varying spatial structures and wavefront velocities were detected during the heating and cooling branches under identical reaction conditions: regular self-oscillations transforming into a “surface turbulence” state.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a8a5004d9e0f62c8fb731be1255e5386 https://doi.org/10.1007/s11144-019-01673-y Zobrazit plný text záznamu Full text from SpringerLink