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Título : Absolute surface coverage of tungsten^alumina catalysts
Autor : Pfaff, C.
Pérez Zurita, M. Josefina
Scott, Carlos
Patiño, Pedro
Goldwasser, Mireya
Goldwasser, J.
Mulcahy, F.M.
Houalla, M.
Hercules, D.M
Palabras clave : tungsten,
absolute surface coverage,
Fecha de publicación : 20-Jul-2015
Resumen : Absolute surface coverages ( ) of a series of tungsten^alumina catalysts prepared by the equilibrium adsorption method were determined by ion scattering spectroscopy (ISS) and low-temperature CO adsorption. The CO values for theWcatalysts were very similar to those obtained with the ISS method, for a given W loading. A linear increase in Wcoverage with increasingW loading, reaching 55%coverage for the 13.1%Wsolid,was observed. The calculatedWcross-sections (22.0^24.5Ð2/W)were in agreement with other reports in the literature. Due to the inherent limitations of each method, the combined use of ISS and low-temperature COadsorption is recommended for estimating absolute surface coverages in tungsten^alumina catalysts.
ISSN : 1572-879X
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