Saber UCV
Repositorio Institucional
Repositorio Institucional
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https://saber.ucv.ve/handle/10872/11421
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| Title: | Absolute surface coverage of tungsten^alumina catalysts |
| Authors: | Pfaff, C. Pérez Zurita, M. Josefina Scott, Carlos Patiño, Pedro Goldwasser, Mireya Goldwasser, J. Mulcahy, F.M. Houalla, M. Hercules, D.M |
| Keywords: | tungsten, absolute surface coverage, ISS, low-temperatureCOadsorption |
| Issue Date: | 20-Jul-2015 |
| Abstract: | 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. |
| URI: | http://hdl.handle.net/10872/11421 |
| ISSN: | 1572-879X |
| Appears in Collections: | Artículos Publicados |
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