TY - JOUR
T1 - Catalytic activity of noble metals promoting hydrogen uptake
AU - Borgschulte, A.
AU - Westerwaal, R.J.
AU - Rector, J.H.
AU - Schreuders, H.
AU - Dam, B.
AU - Griessen, R.P.
N1 - Catalytic activity of noble metals promoting hydrogen uptake
PY - 2006
Y1 - 2006
N2 - The engineering of pure and metal alloy catalysts for hydrogen absorption is needed to improve the kinetics of hydrogen-related devices. We introduce a new route to search for alloys that can yield superior catalytic behavior for hydrogen absorption, using an optical technique to measure the catalytic activity for hydrogen sorption of thin films. The catalytic activity of the noble metals Pd, Ni, Cu, Ag, Pt, and Au is studied as a function of hydrogen pressure and temperature. The rate-limiting step is identified by the pressure dependence and the normal isotope effect for hydrogen absorption. The measured rates and activation energies are correlated to such physical properties as activation barrier for dissociation and heat of solution. The observed compensation effect is explained in the framework of interplay between surface and bulk processes. From the experimentally derived model, a guiding principle for the search for catalysts promoting hydrogen absorption is drawn. © 2006 Elsevier Inc. All rights reserved.
AB - The engineering of pure and metal alloy catalysts for hydrogen absorption is needed to improve the kinetics of hydrogen-related devices. We introduce a new route to search for alloys that can yield superior catalytic behavior for hydrogen absorption, using an optical technique to measure the catalytic activity for hydrogen sorption of thin films. The catalytic activity of the noble metals Pd, Ni, Cu, Ag, Pt, and Au is studied as a function of hydrogen pressure and temperature. The rate-limiting step is identified by the pressure dependence and the normal isotope effect for hydrogen absorption. The measured rates and activation energies are correlated to such physical properties as activation barrier for dissociation and heat of solution. The observed compensation effect is explained in the framework of interplay between surface and bulk processes. From the experimentally derived model, a guiding principle for the search for catalysts promoting hydrogen absorption is drawn. © 2006 Elsevier Inc. All rights reserved.
U2 - 10.1016/j.jcat.2006.01.031
DO - 10.1016/j.jcat.2006.01.031
M3 - Article
SN - 0021-9517
VL - 239
SP - 263
EP - 271
JO - Journal of Catalysis
JF - Journal of Catalysis
IS - 2
ER -