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Real time measurements of hydrogen desorption and absorption during CO exposures of Pd: Hydrogen sticking and dissolution
Linköpings universitet, Institutionen för fysik, kemi och biologi, Kemiska och optiska sensorsystem. Linköpings universitet, Tekniska fakulteten. (Tillämpad Fysik)ORCID-id: 0000-0002-0873-2877
Linköpings universitet, Institutionen för fysik, kemi och biologi. Linköpings universitet, Tekniska högskolan.
1998 (engelsk)Inngår i: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 133, nr 1-2, s. 89-97Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Combined real time measurements of hydrogen desorption and absorption show that both processes may be induced simultaneously by CO adsorption on a hydrogen-covered Pd surface. The induced absorption is found to be a kinetic effect, where the amount absorbed depends on the hydrogen desorption rate and the CO adsorption rate. In addition to simple site blocking, adsorbed CO induces an increase in the hydrogen desorption energy and an activation barrier for hydrogen dissociation. Both increase linearly with CO coverage for θCO>0.18 ML. Below this coverage, the hydrogen dissociation is non-activated.

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1998. Vol. 133, nr 1-2, s. 89-97
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URN: urn:nbn:se:liu:diva-118340DOI: 10.1016/S0169-4332(98)00185-8OAI: oai:DiVA.org:liu-118340DiVA, id: diva2:814492
Tilgjengelig fra: 2015-05-27 Laget: 2015-05-27 Sist oppdatert: 2017-12-04

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