Abstract

The biomass-derived 5-hydroxymethylfurfural (HMF) oxidation holds great significance for the sustainable production of value-added chemicals. However, the construction of active species with efficient oxidative-activity of alcohol/aldehyde still faces a great challenge. In this work, the reconstruction of CuO/Ni MOF successfully implanted CuOOH/NiOOH and deeply clarified their catalytic mechanism for HMF oxidation. It is worth noting that CuOOH/NiOOH exhibited an excellent self-healing ability during HMF oxidation, further realizing the reproducibility and long-term stability of catalyst. Moreover, a two-chamber electrocatalytic system combining HMF oxidation with 4-nitrophenol hydrogenation was established based on the activated CuO/Ni MOF. As a result, the overall reaction achieved a current density of 47.6 mA/cm2 at 0.55 V vs Ag/AgCl (3.0 h), and the corresponding conversion rate and Faraday efficiency reached nearly 100 %. This study provides new insight into the electrocatalytic-reconstruction strategy to implant active species for alcohol/aldehyde oxidation.

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