Enhanced electrocatalytic biomass oxidation at low voltage by Ni2+-O-Pd interfaces

An Pei, Peng Wang, Shiyi Zhang, Qinghua Zhang, Xiaoyi Jiang, Zhaoxi Chen, Weiwei Zhou, Qizhen Qin, Renfeng Liu, Ruian Du, Zhengjian Li, Yongcai Qiu, Keyou Yan, Lin Gu (), Jinyu Ye, Geoffrey I. N. Waterhouse, Wei-Hsiang Huang, Chi-Liang Chen, Yun Zhao () and Guangxu Chen ()
Additional contact information
An Pei: South China University of Technology
Peng Wang: South China University of Technology
Shiyi Zhang: South China University of Technology
Qinghua Zhang: Chinese Academy of Sciences
Xiaoyi Jiang: South China University of Technology
Zhaoxi Chen: South China University of Technology
Weiwei Zhou: South China University of Technology
Qizhen Qin: South China University of Technology
Renfeng Liu: South China University of Technology
Ruian Du: South China University of Technology
Zhengjian Li: South China University of Technology
Yongcai Qiu: South China University of Technology
Keyou Yan: South China University of Technology
Lin Gu: Chinese Academy of Sciences
Jinyu Ye: Xiamen University
Geoffrey I. N. Waterhouse: The University of Auckland
Wei-Hsiang Huang: National Synchrotron Radiation Research Center (NSRRC)
Chi-Liang Chen: National Synchrotron Radiation Research Center (NSRRC)
Yun Zhao: South China University of Technology
Guangxu Chen: South China University of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: 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)2 catalyst with abundant Ni2+-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 Ni2+-O-Pd interfaces. Further, the Ni2+-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)2 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.

Date: 2024
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DOI: 10.1038/s41467-024-50325-w

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