Strong
Metal-Support Interaction in Pt/TiO<sub>2</sub> Induced by Mild HCHO
and NaBH<sub>4</sub> Solution Reduction and
Its Effect on Catalytic Toluene Combustion
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Abstract
Strong metal-support interaction
(SMSI) in titania supported noble
metals has been a subject of many studies due to its importance to
many fields of science, in particular to material science and catalysis
system. H<sub>2</sub> reduction at a high temperature has been commonly
considered as the inducement to SMSI in TiO<sub>2</sub> supported
noble metals. This work, however, demonstrates that SMSI in Pt/TiO<sub>2</sub> can occur through mild NaBH<sub>4</sub> and HCHO solution
reduction processes based on CO chemisorption, transmission electron
microscopy, and X-ray photoelectron spectroscopy characterizations.
Moreover, the effect of TiO<sub>2</sub> crystalline forms on the degree
of SMSI in NaBH<sub>4</sub> reduced Pt/TiO<sub>2</sub> and the performance
of the as-reduced catalysts for trace toluene combustion reaction
were studied. It was found that the degree of SMSI in Pt/TiO<sub>2</sub> drew a significant effect on the catalytic performance. Our discovery
provides a new way to control the interaction between noble metals
and the TiO<sub>2</sub> support as well as their catalytic activities
