Au/MgF2 catalyst is more active in CO oxidation than Au/MgO prepared in the same conditions, in spite of lower efficiency of Au deposition on the MgF2 surface. Its activity decreases (in contrast to Au/MgO) after the hydrogen pre-treatment. Higher activities of Au/MgF2 as compared to Au/MgO prepared in the same conditions, can be due to smaller Au particle size on the MgF2 support as shown by TEM,...
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