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Xue Z, Yao MS, Otake KI, Nishiyama Y, Aoyama Y, Zheng JJ, Zhang S, Kajiwara T, Horike S, Kitagawa S. Modular Design of Highly Stable Semiconducting Porous Coordination Polymer for Efficient Electrosynthesis of Ammonia. Angew Chem Int Ed Engl 2024; 63:e202401005. [PMID: 38584128 DOI: 10.1002/anie.202401005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/06/2024] [Accepted: 04/01/2024] [Indexed: 04/09/2024]
Abstract
Developing highly stable porous coordination polymers (PCPs) with integrated electrical conductivity is crucial for advancing our understanding of electrocatalytic mechanisms and the structure-activity relationship of electrocatalysts. However, achieving this goal remains a formidable challenge because of the electrochemical instability observed in most PCPs. Herein, we develop a "modular design" strategy to construct electrochemically stable semiconducting PCP, namely, Fe-pyNDI, which incorporates a chain-type Fe-pyrazole metal cluster and π-stacking column with effective synergistic effects. The three-dimensional electron diffraction (3D ED) technique resolves the precise structure. Both theoretical and experimental investigation confirms that the π-stacking column in Fe-pyNDI can provide an efficient electron transport path and enhance the structural stability of the material. As a result, Fe-pyNDI can serve as an efficient model electrocatalyst for nitrate reduction reaction (NO3RR) to ammonia with a superior ammonia yield of 339.2 μmol h-1 cm-2 (14677 μg h-1 mgcat. -1) and a faradaic efficiency of 87 % at neutral electrolyte, which is comparable to state-of-the-art electrocatalysts. The in-situ X-ray absorption spectroscopy (XAS) reveals that during the reaction, the structure of Fe-pyNDI can be kept, while part of the Fe3+ in Fe-pyNDI was reduced in situ to Fe2+, which serves as the potential active species for NO3RR.
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Affiliation(s)
- Ziqian Xue
- Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501, Japan
- School of Advanced Energy, Sun Yat-Sen University, Shenzhen, 518107, China
| | - Ming-Shui Yao
- State Key Laboratory of Mesoscience and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Ken-Ichi Otake
- Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | | | | | - Jia-Jia Zheng
- Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology of China, Beijing, 100190, China
| | - Siquan Zhang
- Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Takashi Kajiwara
- Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Satoshi Horike
- Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Susumu Kitagawa
- Institute for Integrated Cell-Material Sciences, Kyoto University, Institute for Advanced Study, Kyoto University Yoshida, Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501, Japan
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