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Ting He, Zhanfeng Zhao, Ruoyang Liu, Xinyan Liu, Bing Ni, Yanping Wei, Yinglong Wu, Wei Yuan, Hong‐Jie Peng, Zhongyi Jiang, Yanli Zhao
The development of efficient photocatalysts for N 2 fixation to produce NH 3 under ambient conditions remains a great challenge. Since covalent organic frameworks (COFs) possess predesignable chemical structures, good crystallinity, and high porosity, it is highly significant to explore their potential for photocatalytic nitrogen conversion. Herein, we report a series of isostructural porphyrin-based COFs loaded with Au single atoms (COFX–Au, X = 1–5) for photocatalytic N 2 fixation. The porphyrin building blocks act as the docking sites to immobilize Au single atoms as well as light-harvesting antennae. The microenvironment of the Au catalytic center is precisely tuned by controlling the functional groups at the proximal and distal positions of porphyrin units. As a result, COF1–Au decorated with strong electron-withdrawing groups exhibits a high activity toward NH 3 production with rates of 333.0 ± 22.4 μmol g –1 h –1 and 37.0 ± 2.5 mmol g Au –1 h –1, which are 2.8- and 171-fold higher than that of COF4–Au decorated with electron-donating functional groups and a porphyrin–Au molecular catalyst, respectively. The NH 3 production rates could be further increased to 427.9 ± 18.7 μmol g –1 h –1 and 61.1 ± 2.7 mmol g Au –1 h –1 under the catalysis of COF5–Au featuring two different kinds of strong electron-withdrawing groups. The structure–activity relationship analysis reveals that the introduction of electron-withdrawing groups facilitates the separation and transportation of photogenerated electrons within the entire framework. This work manifests that the structures and optoelectronic properties of COF-based photocatalysts can be finely tuned through a rational predesign at the molecular level, thus leading to superior NH 3 evolution.
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He, T., Zhao, Z., Liu, R., Liu, X., Ni, B., Wei, Y., Wu, Y., Yuan, W., Peng, H., Jiang, Z., & Zhao, Y. (2023). Porphyrin-Based Covalent Organic Frameworks Anchoring Au Single Atoms for Photocatalytic Nitrogen Fixation. Journal of the American Chemical Society, 145(11), 6057–6066. https://doi.org/10.1021/jacs.2c10233
He, Ting, et al. "Porphyrin-Based Covalent Organic Frameworks Anchoring Au Single Atoms for Photocatalytic Nitrogen Fixation." Journal of the American Chemical Society, vol. 145, no. 11, 2023, pp. 6057–6066, https://doi.org/10.1021/jacs.2c10233.
He, Ting, Zhanfeng Zhao, Ruoyang Liu, Xinyan Liu, Bing Ni, Yanping Wei, Yinglong Wu, et al. "Porphyrin-Based Covalent Organic Frameworks Anchoring Au Single Atoms for Photocatalytic Nitrogen Fixation." Journal of the American Chemical Society 145, no. 11 (2023): 6057–6066. https://doi.org/10.1021/jacs.2c10233.
He T., Zhao Z., Liu R. [и др.] Porphyrin-Based Covalent Organic Frameworks Anchoring Au Single Atoms for Photocatalytic Nitrogen Fixation // Journal of the American Chemical Society. — 2023. — Vol. 145, № 11. — P. 6057–6066. — URL: https://doi.org/10.1021/jacs.2c10233
@article{he2023porphyrinbased,
title = {{Porphyrin-Based Covalent Organic Frameworks Anchoring Au Single Atoms for Photocatalytic Nitrogen Fixation}},
author = {Ting He and Zhanfeng Zhao and Ruoyang Liu and Xinyan Liu and Bing Ni and Yanping Wei and Yinglong Wu and Wei Yuan and Hong‐Jie Peng and Zhongyi Jiang and Yanli Zhao},
journal = {Journal of the American Chemical Society},
year = {2023},
volume = {145},
number = {11},
pages = {6057--6066},
doi = {10.1021/jacs.2c10233},
url = {https://doi.org/10.1021/jacs.2c10233}
}TY - JOUR AU - He, Ting AU - Zhao, Zhanfeng AU - Liu, Ruoyang AU - Liu, Xinyan AU - Ni, Bing AU - Wei, Yanping AU - Wu, Yinglong AU - Yuan, Wei AU - Peng, Hong‐Jie AU - Jiang, Zhongyi AU - Zhao, Yanli TI - Porphyrin-Based Covalent Organic Frameworks Anchoring Au Single Atoms for Photocatalytic Nitrogen Fixation JO - Journal of the American Chemical Society VL - 145 IS - 11 SP - 6057 EP - 6066 PY - 2023 DA - 2023/03/08 DO - 10.1021/jacs.2c10233 UR - https://doi.org/10.1021/jacs.2c10233 ER -
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