Copper and chromium modified SBA-15: 11C-radiolabeling catalytic study

Novel 11C-radiolabeling catalytic approach is applied for the characterization of copper and chromium modified SBA-15 materials. The method is based on the selective adsorption of 11C-methanol on different catalytic sites with the detection of the products of the conversion. The high CO2 and methylformate selectivity is related to the activity of CuO and Cr2O3 species, while copper chromate nanoparticles facilitate the formation of dimethoxymethane.

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► High sensitive radioisotopic method for catalysts characterization at low surface coverage.
► CO2 formation is related to the activity of Cu containing easily reducible species.
► Methylformate forms on the chromium oxide species.
► Dimethoxymethane is produced with high selectivity on spinel Cu–Cr oxide species.