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Abstract:
This Review discusses the structural and catalytic aspects of the
recently introduced reactive metal-support interaction. This special
term was coined to account for the inability of the original concept of
the strong metal-support interaction to accurately describe the
structural, compositional, and electronic changes frequently occurring
in oxide-supported metal particle catalysts at very high temperatures
upon reduction in hydrogen, in many cases leading to intermetallic
compound or substitutional alloy formation. This inaccuracy
predominantly refers to the requirement of full reversibility upon
oxidation and mild reduction for a strong metal-support interaction. A
close look at the formation of oxide-supported intermetallic compounds
upon high-temperature reduction reveals that these compounds are very
common in catalysis and the situation is much more complex compared to
unsupported intermetallic compounds due to the presence of the
intermetallic compound-oxide interface.
