Oxide/support interaction and surface reconstruction in the sodium tungstate(Na2WO4)/silica system

Autor:	Hong Li Wang, Chang Jiang Yu, Xue Ping Fang, Shu Ben Li, Zhi Cheng Jiang
Rok vydání:	1993
Předmět:	Inorganic chemistry General Engineering Oxide Analytical chemistry Positron annihilation spectroscopy chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Monolayer X-ray crystallography Sodium tungstate Oxidative coupling of methane Crystallite Physical and Theoretical Chemistry
Zdroj:	The Journal of Physical Chemistry. 97:12870-12875
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100151a038
Popis:	The surface dispersion state and oxide/support interaction in the MnO x -Na 2 WO 4 /SiO 2 catalyst system for oxidative coupling of methane have been studied by XRD (X-ray diffraction), XPS (X-ray photoelectron spectroscopy), and PASCA (positron annihilation spectroscopy for chemical analysis). It was observed that Mn existed as Mn 2 O 3 -free crystallites and Na 2 WO 4 was dispersed on the silica support preferentially. A close-packed monolayer of Na 2 WO 4 was formed at a loading of 4 wt %
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c3fc761788fd952326486724304b66f3 https://doi.org/10.1021/j100151a038 Zobrazit plný text záznamu