Abstract
Novel Ag/SiO2–Al2O3 catalysts with low silver content prepared by the sol–gel method exhibit excellent catalytic properties in the catalytic oxidation of methanol to formaldehyde. The silver content was as low as 2% and the yield of formaldehyde was achieved as 90.3%, which is 16% higher than that of pumice‐supported silver and even 5–6% higher than that of a commercial electrolytic silver catalyst. XRD, XPS and SEM results reveal that all silver was present as Ag+ before catalytic reaction and was partially reduced to the metallic state after the reaction. It was also found that silver was aggregated on the surface after its reduction.
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Dai, W., Li, J., Cao, Y. et al. Novel sol–gel‐derived Ag/SiO2–Al2O3 catalysts for highly selective oxidation of methanol to formaldehyde. Catalysis Letters 64, 37–40 (2000). https://doi.org/10.1023/A:1019066415748
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DOI: https://doi.org/10.1023/A:1019066415748