Enhanced electrocatalytic biomass oxidation at low voltage by Ni-O-Pd interfaces.

Nat Commun

School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, China.

Published: July 2024

AI Article Synopsis

  • Challenges in efficiently converting biomass-based aldehydes and alcohols to acids limit their broader application; this study presents a solution with a new catalyst.
  • The Pd/Ni(OH) catalyst achieves nearly 100% selectivity in producing 2,5-furandicarboxylic acid from 5-hydroxymethylfurfural, yielding 97.3% at a voltage of 0.6 V under standard conditions.
  • The catalyst's effectiveness is enhanced by its unique Ni-O-Pd interfaces, which promote reaction steps, prevent nanoparticle clumping, and maintain stability over 200 hours of continuous use.

Article Abstract

Challenges in direct catalytic oxidation of biomass-derived aldehyde and alcohol into acid with high activity and selectivity hinder the widespread biomass application. Herein, we demonstrate that a Pd/Ni(OH) catalyst with abundant Ni-O-Pd interfaces allows electrooxidation of 5-hydroxymethylfurfural to 2, 5-furandicarboxylic acid with a selectivity near 100 % and 2, 5-furandicarboxylic acid yield of 97.3% at 0.6 volts (versus a reversible hydrogen electrode) in 1 M KOH electrolyte under ambient conditions. The rate-determining step of the intermediate oxidation of 5-hydroxymethyl-2-furancarboxylic acid is promoted by the increased OH species and low C-H activation energy barrier at Ni-O-Pd interfaces. Further, the Ni-O-Pd interfaces prevent the agglomeration of Pd nanoparticles during the reaction, greatly improving the stability of the catalyst. In this work, Pd/Ni(OH) catalyst can achieve 100% 5-hydroxymethylfurfural conversion and >90% 2, 5-furandicarboxylic acid selectivity in a flow-cell and work stably over 200 h under a fixed cell voltage of 0.85 V.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11246419PMC
http://dx.doi.org/10.1038/s41467-024-50325-wDOI Listing

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