Combinatorial method for the development of a catalyst promoting hydrogen uptake

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Combinatorial method for the development of a catalyst promoting hydrogen uptake

Journal Article (2005)

Author(s)

A. Borgschulte (Vrije Universiteit Amsterdam)

W. Lohstroh (Vrije Universiteit Amsterdam)

R. J. Westerwaal (Vrije Universiteit Amsterdam)

H. Schreuders (Vrije Universiteit Amsterdam)

J. H. Rector (Vrije Universiteit Amsterdam)

B. Dam (Vrije Universiteit Amsterdam)

R. Griessen (Vrije Universiteit Amsterdam)

Thin films Hydrogen storage material Gas-solid interaction Light absorption

DOI related publication

https://doi.org/10.1016/j.jallcom.2005.01.137 Final published version

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https://resolver.tudelft.nl/uuid:3b1164ca-d36b-403c-80b9-c54d81046fa4

More Info

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Publication Year

2005

Language

English

Journal title

Journal of Alloys and Compounds

Volume number

404-406

Pages (from-to)

699-705

Downloads counter

87

Abstract

A novel optical technique to measure catalytic activity for hydrogen sorption is presented. The catalytic activity of the noble metals of Pd, Ni, Cu and Ag is studied as function of pressure and temperature. The uptake rate is limited by chemisorption as deduced by modelling kinetics. An empirical relation between uptake rate and the measured activation energy is given. The catalytic activity of NbOx is studied as a function of the oxygen concentration determined from electron spectroscopy. The measured activation energy depends strongly on the oxygen concentration and reaches a minimum of 0.6 eV at the highest oxygen content (x=2.5, i.e. Nb2O5). Pure Nb does not display a significant catalytic effect.