Volume 137, Issue 9 e202420992
Forschungsartikel

Promoting Alcohols Electrooxidation Coupled with Hydrogen Production via Asymmetric Pulse Potential Strategy

Tian Xia

Tian Xia

State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

These authors contributed equally to this work.

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Jiangrong Yang

Jiangrong Yang

State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

These authors contributed equally to this work.

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Qinghui Ren

Qinghui Ren

State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

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Yu Fu

Yu Fu

State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

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Zhiyuan Zhang

Zhiyuan Zhang

Quzhou Institute for Innovation in Resource Chemical Engineering, Quzhou, Zhejiang, 323000 China

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Prof. Zhenhua Li

Corresponding Author

Prof. Zhenhua Li

State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

Quzhou Institute for Innovation in Resource Chemical Engineering, Quzhou, Zhejiang, 323000 China

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Prof. Mingfei Shao

Corresponding Author

Prof. Mingfei Shao

State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

Quzhou Institute for Innovation in Resource Chemical Engineering, Quzhou, Zhejiang, 323000 China

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Prof. Xue Duan

Prof. Xue Duan

State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

Quzhou Institute for Innovation in Resource Chemical Engineering, Quzhou, Zhejiang, 323000 China

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First published: 08 December 2024

Abstract

Electrocatalytic organic oxidation coupled with hydrogen (H2) production emerges as a profitable solution to simultaneously reduce overall energy consumption of H2 production and synthetic high-value chemicals. Noble metal catalysts are highly efficient electrocatalysts in oxidation reactions, but they deactivate easily weakening the benefit in actual production. Herein, we report a universal asymmetric pulse potential strategy to achieve long-term stable operation of noble metals for various alcohol oxidation reactions and noble metal catalysts. For example, by pulsed potentials between 0.8 V and 0 V vs. RHE, palladium (Pd)-catalyzed glycerol (GLY) electrooxidation can continuously proceed for more than 2800 h with glyceric acid (GLA) selectivity of >70 %. Whereas, Pd electrocatalyst becomes nearly deactivated within 6 h of reaction under conventional potentiostatic strategy. Experimental and theoretical calculation results reveal that the generated electrophilic OH* from H2O/OH oxidation on Pd (denoted as Pd−OH*) acts as main active species for GLY oxidation. However, Pd−OH* is prone to be oxidized to PdOx resulting in performance decay. When a short reduction potential (e.g., 0 V vs. RHE for 5 s) is powered, PdOx can be reversibly reduced to restore the current. Moreover, we tested the feasibility of this strategy in a flow electrolyzer, verifying the practical application potential.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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