liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Hydrogen adsorbed on palladium during water formation studied with palladium membranes
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology.
2001 (English)In: Applied Surface Science, ISSN 0169-4332, Vol. 173, no 1-2, 122-133 p.Article in journal (Refereed) Published
Abstract [en]

The amount of hydrogen adsorbed on palladium during water formation has been studied by measurements of the rate at which hydrogen permeates a palladium membrane. The water formation and hydrogen permeation rates were measured simultaneously for palladium membranes exposed to a hydrogen-oxygen-argon mixture on one side and to pure argon on the other side. Investigations were carried out for the temperatures 100, 150 and 200 °C at a total pressure of 760 Torr. If the rates are plotted as a function of a, where a = pH(2)/(pH(2)+pO(2)), pH(2) and pO(2) are the pressures of hydrogen and oxygen at the palladium surface, respectively, it is found that, at 100 °C, a peak occurs in the water formation rate at amax˜0.2. The palladium surface is dominated by hydrogen for a>amax and is hydrogen deficient for a>amax. This is consistent with a rate limiting step for the water forming reaction where adsorbed hydrogen is one of the reactants. It is also concluded that the heat of adsorption for hydrogen on the palladium surface is significantly lower than previously derived from experiments made under ultrahigh vacuum conditions.

Place, publisher, year, edition, pages
2001. Vol. 173, no 1-2, 122-133 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-47431DOI: 10.1016/S0169-4332(00)00894-1OAI: diva2:268327
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-13

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Ekedahl, Lars-Gunnar
By organisation
The Institute of TechnologyDepartment of Physics, Chemistry and Biology
In the same journal
Applied Surface Science
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 28 hits
ReferencesLink to record
Permanent link

Direct link