Abstract
AbstractFormamide is an important solvent and synthetic intermediate. Herein, we designed a hydroxyapatite (HAP)‐stabilized, positively charged Ru‐based catalysts which can efficiently catalyze the formylation reaction of amines with CO for the synthesis of formamide. The Ru‐HAP showed excellent catalytic performance in N,N‐Dimethylformamide (DMF) synthesis, with about 75 % dimethylamine conversion and >99 % DMF selectivity at 300 h of continuous reaction. The combination of characterization results and control experiments showed that positively charged Ru species, including hydrated RuOx and Ru3+ species, were catalytically active. In particular, the surface RuOx species were more active than the Ru3+ species located within the HAP framework.
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