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Electrocatalytic Alcohol Oxidation to Aldehyde Through Direct Dehydrogenation Mechanism Using a High-Performance
Kai Shi1, Yuwei Ren1, Bo Zhou1
1State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, ECNU Engineering Center for Sustainable Carbon, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P.R. China.
Angewandte Chemie (International Ed. in English)
|October 15, 2025
Summary
A new direct dehydrogenation mechanism (DDM) enables efficient electrocatalytic upgrading of carbon sources. This green chemistry approach uses a novel Pt/Co3O4/CC catalyst for high-value chemical synthesis under mild conditions.
Area of Science:
- Electrochemistry
- Catalysis
- Green Chemistry
Background:
- Electrocatalytic upgrading of carbon sources is key for sustainable chemical synthesis and carbon neutrality.
- Current methods often rely on reactive oxygen species-mediated mechanisms (ROSMM), requiring harsh conditions and high energy input.
- Developing efficient and selective electrocatalytic pathways under mild conditions remains a significant challenge.
Purpose of the Study:
- To propose and demonstrate a novel electrochemical direct dehydrogenation mechanism (DDM) for upgrading low-value carbon sources.
- To develop a highly efficient catalyst for the electrocatalytic conversion of ethylene glycol to glycolaldehyde dimer.
- To showcase the potential of DDM for synthesizing various value-added aldehydes with reduced energy consumption.
Main Methods:
- Development of a Pt/Co3O4/CC catalyst supported on carbon cloth (CC).
- Electrochemical evaluation of the catalyst for ethylene glycol upgrading in a neutral electrolyte.
- Characterization of the reaction mechanism, selectivity, and efficiency.
Main Results:
- The Pt/Co3O4/CC catalyst achieved ultralow potential (0.4 V vs RHE) at a current density of 3.7 mA cm⁻².
- Exceptional performance metrics were obtained: ~100.0% Faradaic efficiency, 99.0% selectivity, and 204.9 µmol h⁻¹ cm⁻² productivity.
- The direct dehydrogenation mechanism (DDM) was validated, outperforming traditional ROSMM.
Conclusions:
- The proposed direct dehydrogenation mechanism (DDM) offers a greener and more energy-efficient alternative to ROSMM for electrocatalytic upgrading.
- The developed Pt/Co3O4/CC catalyst demonstrates superior performance in synthesizing glycolaldehyde dimer from ethylene glycol.
- This work provides new insights for designing electrocatalysts and optimizing reaction pathways for sustainable chemical production.
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