Abstract
The upgrading of biomass into sustainable and valuable fine chemicals is an alternative to the use of state-of-the-art petrochemicals. The conversion of 5-hydroxymethylfurfural (HMF) biomass derivative into 2,5-furandicarboxylic acid (FDCA) has been recognized as an economical and green approach to replace the current polyethylene terephthalate based plastic industry. However, this reaction mostly relies on noble-metal-based catalysts for the sluggish aerobic oxidation of alcohol groups. In this work, we report a series of hierarchical Ni-Co-based transition metal oxide catalysts for HMF oxidation by electrocatalysis. Comprehensive material characterization and electrochemical evaluation have been performed. A 90 % FDCA yield, nearly 100 % Faradaic efficiency, and robust stability were achieved for NiCo2 O4 nanowires. As non-precious-metal catalysts, Ni-Co-based transition metal oxides may open up new potential materials for highly efficient electrochemical biomass upgrading.
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