Synthesis of N-doped Carbon Coated FeCoNi Particles and Their Catalytic Application in Glycerol Dehydrogenation for Lactic Acid Production
Lactic acid,as a biomass-based platform chemical,is an ideal raw material for the synthesis of biodegradable polymers.In this paper,nitrogen-doped carbon-coated FeCoNi alloy catalysts were synthesized by a one-pot method.TEM results showed that FeCoNi@NC nanomaterials were core-shell structures,and the transition metal cores catalyzed the graphitization of amorphous carbon during pyrolysis,which was beneficial for the electron transfer from the metal nanoparticles to the inter-layers of carbon to enhance the catalytic activity.FeCoNi@NC displayed the excellent catalytic activity in catalyzing the glycerol dehydrogenation reaction with the glycerol conversion and lactic acid selectivity reaching 98.1%and 95.6%,respectively,at 220℃.In addition,the protective effect of the outer carbon shell inhibited the leaching and deactivation of the alloy particles,and the FeCoNi@NC remained stable after five consecutive cycles.This catalytic system provides an efficient and economical method for upgrading biodiesel by-product glycerol to high-value lactic acid.
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