Volume 64, Issue 24 e202506275
Research Article

Solar-Driven Reversible Hydrogen Storage of Sodium Cyclohexanolate/Phenoxide Pair

Khai Chen Tan

Khai Chen Tan

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 China

Both authors contributed equally to this work.

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Qijun Pei

Qijun Pei

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

Both authors contributed equally to this work.

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Jiafeng Yu

Jiafeng Yu

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

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Lin Liu

Lin Liu

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

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Jiayin Li

Jiayin Li

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 China

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Li Han

Li Han

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

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Yang Yu

Yang Yu

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

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Zhao Li

Zhao Li

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

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Alexis Munyentwali

Alexis Munyentwali

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 China

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Jiaquan Guo

Jiaquan Guo

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 China

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Yuting Wang

Yuting Wang

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 China

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Li Rao

Corresponding Author

Li Rao

Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079 China

E-mail: [email protected]; [email protected]; [email protected]

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Teng He

Corresponding Author

Teng He

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 China

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

E-mail: [email protected]; [email protected]; [email protected]

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Ping Chen

Corresponding Author

Ping Chen

Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 China

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 08 April 2025

Graphical Abstract

Solar-driven reversible hydrogen storage of sodium cyclohexanolate/phenoxide pair demonstrated 99.9% conversion and selectivity in both hydrogenation and dehydrogenation via photocatalysis without external heating. The synergy between high- and low-frequency light enhances the overall performance, i.e., low-frequency light provides heat, while high-frequency light facilitates the desorption of product from the catalyst surface.

Abstract

Reversible hydrogen storage is a key challenge for the implementation of hydrogen energy, with dehydrogenation being particularly difficult because of its endothermic nature, slow kinetics, poor selectivity, etc. Solar energy-driven hydrogen uptake/release represents an interdisciplinary approach that provides an effective solution to those problems. Herein, we report the solar-driven reversible hydrogen uptake of 4.9 wt.% over sodium cyclohexanolate/phenoxide pair, achieving over 99.9% conversion and selectivity in both hydrogenation and dehydrogenation via photocatalysis without external heating. Notably, the initial dehydrogenation rate reaches 23.4 that is ca. 2 orders of magnitude higher than thermocatalysis. The superior photocatalytic performance stems from the synergy between high- and low-frequency light, i.e., low-frequency light mainly provides heat, high-frequency light drives the desorption of product from the catalyst surface. This approach offers a path toward a sustainable solar-driven hydrogen energy system.

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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