Single-atom silver-manganese nanocatalysts based on atom-economy design for reaction temperature-controlled selective hydrogenation of bioresources-derivable diethyl oxalate to ethyl glycolate and acetaldehyde diethyl acetal

Add time:09/04/2019    Source:sciencedirect.com

The research was designed to synthesize novel single-atom silver-manganese nanocatalysts with a simple method for producing highly demanded ethyl glycolate (EGly) and acetaldehyde diethyl acetal (ADA) by hydrogenating bioresources-derivable diethyl oxalate (DEO) under different temperatures. DEO conversions achieved with the catalyst are 80–100%. 100% EGly or 97% ADA selectivity was produced by simply tuning reaction temperatures. The single-atom silver-manganese nanocatalysts were formed through the entrance of Ag atoms into the lattice tunnels of hollandite-type manganese oxide (HMO) under H2 reduction at 200 °C. The excellent activities of the nanocatalysts are mainly ascribed to the activation of H2 and desirable chemical adsorption of DEO and ethanol. The EGly was formed through the first order hydrogenation of DEO, while the ADA was obtained via the hydrogenation, dehydration and reaction. With the help of high-efficiency nanocatalysts, bioresources are promising raw materials for producing various high-value chemicals in environmentally responsible manners.

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