Surface Studies of La203 Based OCM Catalysts by XPS: Does Surface Peroxycarbonate Play an Important Role in Catalyst Selectivity?

Autor:	Michel Bisiaux, Charles Cameron, Jean-Luc Dubois
Rok vydání:	1991
Předmět:	chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Peroxycarbonate Superoxide Inorganic chemistry Binding energy Catalyst selectivity Carbonate Oxidative coupling of methane Catalysis
DOI:	10.1016/s0167-2991(08)60069-5
Popis:	La 2 O 3 based oxidative coupling of methane catalysts have been studied by X-ray photoelectron spectroscopy. A high binding energy Ols peak at 532.6-533.2 eV, was found and is believed to be due to a peroxycarbonate species (CO 4 =). A surface equilibrium involving superoxide species and peroxycarbonate is suggested. Catalytic tests in the presence and absence of stable surface carbonate indicate that surface O 2 − is responsible for heterogeneous CO formation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::190a9723a2bc596f2575badf1c1afd4f https://doi.org/10.1016/s0167-2991(08)60069-5 Zobrazit plný text záznamu