Abstract
The chemisorption of hydrogen on ferromagnetic transition metals is studied self-consistently with use of a spin-dependent Anderson-Hubbard Hamiltonian. The electronic structure of the crystal is treated with the Bethe-lattice method. The present treatment differs from previous ones in that the dominant effects of the change in occupancy of the substrate orbitals are taken into account. The consequent modification of the substrate Hamiltonian leads to the result that the chemisorption energy changes very little with the change of the magnetization of the substrate. This finding agrees with recent experimental evidence that a magnetic phase transition has no influence on the catalytic activity.
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