Influence of a high electric
field on the interaction of hydrogen with small palladium clusters: DFT studies
Chem.
Met. Alloys 4 (2011) 6-12
https://doi.org/10.30970/cma4.0136
Agnieszka TOMASZEWSKA, Zdzisław STĘPIEŃ, Beata BIAŁEK
The effect of an external electric field of 25
V/nm on the interaction of atomic hydrogen with palladium clusters consisting
of four and six atoms was investigated using the density-functional theory. The
equilibrium geometry found for the systems under investigation is in good
agreement with other computational studies carried out for extended systems, however the values obtained for the adsorption
energy are overestimated. A comparison with the results obtained for clusters
not affected by an external electric field shows that the effect of the field
is a decrease of the energy barrier for incorporation of hydrogen into the
clusters. The changes of the electronic structure induced by the electric field
and the nature of the bonding between H and Pd atoms are analysed in a
discussion of the density of states of the systems.
Pdn (n = 4, 6) clusters. The
small circles represent H atoms.
Keywords
Palladium / Hydrogen / DFT
calculations