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Peer-reviewedCC BY 4.0Advanced Science

Surface‐State‐Driven Selectivity of Electrocatalytic Glucose Oxidation: Metallic Au, Au─OH, and CuO

  • Myeonghwan Oh1,2
  • Hoeun Seong1
  • Ga Eun Jo3
  • Jiyoung Hwang3
  • Yurim Sohn4
  • Kyoungsuk Jin2
  • Jong Hyeok Park5
  • Wooyul Kim4
  • Seok Ki Kim3
  • Dong Ki Lee1,5,6
6 affiliations
  1. 1Clean Energy Research Center Korea Institute of Science and Technology (KIST) Seoul Republic of Korea
  2. 2Department of Chemistry Korea University Seoul Republic of Korea
  3. 3Department of Chemical Engineering Ajou University Suwon Republic of Korea
  4. 4Department of Energy Engineering Korea Institute of Energy Technology Naju Republic of Korea
  5. 5Department of Chemical and Biomolecular Engineering Yonsei‐KIST Convergence Research Institute Yonsei University Seoul Republic of Korea
  6. 6Graduate School of Energy and Environment Korea University Seoul Republic of Korea
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Abstract

The electrochemical glucose oxidation reaction (GLUOR) offers a sustainable route for biomass valorization, yet its reaction mechanisms and the factors governing product selectivity remain poorly understood. Herein, we present a comprehensive mechanistic investigation of GLUOR on Au and CuO catalysts. Au catalysts preserve the C6 carbon backbone while exhibiting surface‐state‐dependent oxidation of terminal functional groups of glucose (GLU), whereas CuO catalysts preferentially promote C─C bond cleavage reactions. Theoretical investigation reveals that C─C bond cleavage is energetically unfavorable on Au surfaces, in either the metallic or the hydroxylated state, but it is thermodynamically preferred on CuO surfaces. Furthermore, we provide spectroscopic and computational evidence that pyranose glucose undergoes ring opening on metallic Au surfaces, while ring‐retained pathways dominate on Au─OH and CuO surfaces, leading to gluconolactone formation and C─C bond cleavage, respectively. These findings provide a fundamental framework for interpreting product selectivity in glucose oxidation and offer mechanistic insights applicable to a broad range of biomass valorization processes.

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Cite

BibTeXRIS
BibTeX
@article{oh2026surfacestatedriven,
  title = {{Surface‐State‐Driven Selectivity of Electrocatalytic Glucose Oxidation: Metallic Au, Au─OH, and CuO}},
  author = {Myeonghwan Oh and Hoeun Seong and Ga Eun Jo and Jiyoung Hwang and Yurim Sohn and Kyoungsuk Jin and Jong Hyeok Park and Wooyul Kim and Seok Ki Kim and Dong Ki Lee},
  journal = {Advanced Science},
  year = {2026},
  month = nov,
  doi = {10.1002/advs.78627},
  url = {https://doi.org/10.1002/advs.78627},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Surface‐State‐Driven Selectivity of Electrocatalytic Glucose Oxidation: Metallic Au, Au─OH, and CuO
AU  - Myeonghwan Oh
AU  - Hoeun Seong
AU  - Ga Eun Jo
AU  - Jiyoung Hwang
AU  - Yurim Sohn
AU  - Kyoungsuk Jin
AU  - Jong Hyeok Park
AU  - Wooyul Kim
AU  - Seok Ki Kim
AU  - Dong Ki Lee
PY  - 2026
DA  - 2026/11/05
JO  - Advanced Science
DO  - 10.1002/advs.78627
UR  - https://doi.org/10.1002/advs.78627
AB  - The electrochemical glucose oxidation reaction (GLUOR) offers a sustainable route for biomass valorization, yet its reaction mechanisms and the factors governing product selectivity remain poorly understood. Herein, we present a comprehensive mechanistic investigation of GLUOR on Au and CuO catalysts. Au catalysts preserve the C6 carbon backbone while exhibiting surface‐state‐dependent oxidation of terminal functional groups of glucose (GLU), whereas CuO catalysts preferentially promote C─C bond cleavage reactions. Theoretical investigation reveals that C─C bond cleavage is energetically unfavorable on Au surfaces, in either the metallic or the hydroxylated state, but it is thermodynamically preferred on CuO surfaces. Furthermore, we provide spectroscopic and computational evidence that pyranose glucose undergoes ring opening on metallic Au surfaces, while ring‐retained pathways dominate on Au─OH and CuO surfaces, leading to gluconolactone formation and C─C bond cleavage, respectively. These findings provide a fundamental framework for interpreting product selectivity in glucose oxidation and offer mechanistic insights applicable to a broad range of biomass valorization processes.
SN  - 2198-3844
ER  -