Journal
PHYSICAL REVIEW LETTERS
Volume 100, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.100.116801
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On the basis of density functional theory calculations, a novel bond mechanism with chemical strength but of long-ranged character is proposed. As compared to adsorption on a sole oxide or metal, the mechanism is found to enhance the bond strength between an adsorbate and an oxide in contact with a metal. As a model system, NO2 adsorption on alpha-Al2O3(0001) either in contact with Ag(111) or small Ag-n clusters is used. The observed phenomenon rests on charge transfer and modification of the oxide-metal interface. The mechanism is general in nature and the implication for heterogeneous catalysis is discussed.
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