4.8 Article

Selective Electrooxidation of Biomass-Derived Alcohols to Aldehydes in a Neutral Medium: Promoted Water Dissociation over a Nickel-Oxide-Supported Ruthenium Single-Atom Catalyst

Journal

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 19, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202200211

Keywords

Aldehydes; Biomass Upgrading; Electrocatalysis; Neutral Medium; Single-Atom Catalysts

Funding

  1. National Natural Science Foundation of China [21978147, 21935001]

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This study reports the selective electrooxidation of biomass-derived alcohols to aldehydes using single-atom ruthenium on nickel oxide as a catalyst in neutral medium. It demonstrates high efficiency and potential for sustainable production of value-added aldehyde compounds.
The biomass-derived alcohol oxidation reaction (BDAOR) holds great promise for sustainable production of chemicals. However, selective electrooxidation of alcohols to value-added aldehyde compounds is still challenging. Herein, we report the electrocatalytic BDAORs to selectively produce aldehydes using single-atom ruthenium on nickel oxide (Ru-1-NiO) as a catalyst in the neutral medium. For electrooxidation of 5-hydroxymethylfurfural (HMF), Ru-1-NiO exhibits a low potential of 1.283 V at 10 mA cm(-2), and an optimal 2,5-diformylfuran (DFF) selectivity of 90 %. Experimental studies reveal that the neutral electrolyte plays a critical role in achieving a high aldehyde selectivity, and the single-atom Ru boosts HMF oxidation in the neutral medium by promoting water dissociation to afford OH*. Furthermore, Ru-1-NiO can be extended to selective electrooxidation of a series of biomass-derived alcohols to corresponding aldehydes, which are conventionally difficult to obtain in the alkaline medium.

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