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Real time measurements of hydrogen desorption and absorption during CO exposures of Pd: Hydrogen sticking and dissolution
Linköping University, Department of Physics, Chemistry and Biology, Chemical and Optical Sensor Systems. Linköping University, Faculty of Science & Engineering. (Tillämpad Fysik)ORCID iD: 0000-0002-0873-2877
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
1998 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 133, no 1-2, 89-97 p.Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
1998. Vol. 133, no 1-2, 89-97 p.
National Category
Analytical Chemistry
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URN: urn:nbn:se:liu:diva-118340DOI: 10.1016/S0169-4332(98)00185-8OAI: oai:DiVA.org:liu-118340DiVA: diva2:814492
Available from: 2015-05-27 Created: 2015-05-27 Last updated: 2015-06-08

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Eriksson, MatsEkedahl, Lars-Gunnar
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Chemical and Optical Sensor SystemsFaculty of Science & EngineeringDepartment of Physics, Chemistry and BiologyThe Institute of Technology
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