CO<sub>2</sub>-mediated hydrogen storage and release cycles realized by a bimetallic ruthenium complex in pure water

CO<sub>2</sub>-mediated liquid H<sub>2</sub> storage is a promising technology; however, it typically requires additives such as bases, which increase both cost and energy consumption. Herein, a bimetallic Ru complex is fabricated that catalyzes reversible cycles of CO<sub>2</sub> hydrogenation to formic acid (FA) and FA dehydrogenation in pure water without any additives. The H<sub>2</sub> storage and release cycles are controlled simply by varying the H<sub>2</sub> pressure at 80 °C. Moreover, the system maintains its activity over at least 15 cycles (240 h), achieving a cumulative H<sub>2</sub> storage of nearly 2000 μmol. Labeling experiments using <sup>13</sup>CO<sub>2</sub> and D<sub>2</sub> confirm the origins of the C and H atoms in FA. This efficient, green, and mild system demonstrates potential for sustainable hydrogen energy applications.

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Publication Details

Journal
Chemical Communications
Published
2025-01-01
DOI
https://doi.org/10.1039/d5cc00802f
Primary Topic
Catalytic Processes in Materials Science
Type
article
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article

CO2-mediated hydrogen storage and release cycles realized by a bimetallic ruthenium complex in pure water

Chong Cheng, Weichao Xue, Siheng Yang, Xueli Zheng et al.
Chemical Communications
Catalytic Processes in Materials Science
article

CO2-mediated hydrogen storage and release cycles realized by a bimetallic ruthenium complex in pure water

Chong Cheng, Weichao Xue, Siheng Yang, Xueli Zheng, Jiaqi Xu, Tianhua Cui, Huihua Gong, Ruixiang Li, Haiyan Fu, Hua Chen, Shuang Li, Ji Li, Yaozhong Kong
article en

Abstract

CO<sub>2</sub>-mediated liquid H<sub>2</sub> storage is a promising technology; however, it typically requires additives such as bases, which increase both cost and energy consumption. Herein, a bimetallic Ru complex is fabricated that catalyzes reversible cycles of CO<sub>2</sub> hydrogenation to formic acid (FA) and FA dehydrogenation in pure water without any additives. The H<sub>2</sub> storage and release cycles are controlled simply by varying the H<sub>2</sub> pressure at 80 °C. Moreover, the system maintains its activity over at least 15 cycles (240 h), achieving a cumulative H<sub>2</sub> storage of nearly 2000 μmol. Labeling experiments using <sup>13</sup>CO<sub>2</sub> and D<sub>2</sub> confirm the origins of the C and H atoms in FA. This efficient, green, and mild system demonstrates potential for sustainable hydrogen energy applications.

Chemical CommunicationsVol. 61(32)
Sichuan University (CN), Neijiang Normal University (CN), École Polytechnique Fédérale de Lausanne (CH)
Openalex Percentile: Top 96%
Catalytic Processes in Materials Science
DOIOpen Access PDFOpenAlex
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CO<sub>2</sub>-mediated hydrogen storage and release cycles realized by a bimetallic ruthenium complex in pure water — Chong Cheng, Weichao Xue, et al. · Chemical Communications (2025) | TGRS Research Map | TGRS