Carbon dots modified nanoflower petals with super enhanced nitrogen electro-reduction efficiency

Nitrogen electro-reduction reaction (NERR) is a promising alternative method for ammonia production to the Haber–Bosch approach due to mild reaction conditions and free harmful by-product emission. A formidable challenge in bringing NERR closer to the practical application is developing an electro-c...

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Veröffentlicht in:Chinese chemical letters 2023-06, Vol.34 (6), p.107888-411, Article 107888
Hauptverfasser: Zhou, Yang, Lu, Xuanzhao, Chang, Yu-chung, Ma, Yanwen, Wang, Linlin, Zhang, Jianrong, Zhu, Junjie
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container_end_page 411
container_issue 6
container_start_page 107888
container_title Chinese chemical letters
container_volume 34
creator Zhou, Yang
Lu, Xuanzhao
Chang, Yu-chung
Ma, Yanwen
Wang, Linlin
Zhang, Jianrong
Zhu, Junjie
description Nitrogen electro-reduction reaction (NERR) is a promising alternative method for ammonia production to the Haber–Bosch approach due to mild reaction conditions and free harmful by-product emission. A formidable challenge in bringing NERR closer to the practical application is developing an electro-catalyst which can simultaneously improve the Faraday efficiency and reduce the reaction over-potential. Herein, we fabricated a catalyst of nitrogen-doped carbon dots modified copper-phosphate nanoflower petals (CuPo-NCDs NF) via a self-assembly method. The flower structure endowed the CuPo-NCDs NF with large specific surface area, and thus enabled more active sites to be exposed. In particular, we demonstrated that the NCDs modified CuPo petals with flower-like structure can accelerate the interfacial proton-electron transfer, suppressing the competing hydrogen evolution reaction and promoting the desired NERR process. Ultimately, for the CuPo-NCDs NF catalyzed NERR, the FENH3 and the reaction potential both were boosted, the resultant energy efficiency of NERR reached a record-breaking value of 56.5%, and the NH3 yield rate increased by 7 times compared to NCDs. This study provides a novel catalyst with a new pathway to boost the NERR. A nitrogen-doped carbon dots modified nano-flower with enhanced interfacial proton-electron transfer was fabricated via an in situ assembly method. It could simultaneously boost the Faraday efficiency and reduce the reaction over-potential of NERR, improving the energy efficiency of NERR to a recording-breaking value of 56.5%. [Display omitted]
doi_str_mv 10.1016/j.cclet.2022.107888
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A formidable challenge in bringing NERR closer to the practical application is developing an electro-catalyst which can simultaneously improve the Faraday efficiency and reduce the reaction over-potential. Herein, we fabricated a catalyst of nitrogen-doped carbon dots modified copper-phosphate nanoflower petals (CuPo-NCDs NF) via a self-assembly method. The flower structure endowed the CuPo-NCDs NF with large specific surface area, and thus enabled more active sites to be exposed. In particular, we demonstrated that the NCDs modified CuPo petals with flower-like structure can accelerate the interfacial proton-electron transfer, suppressing the competing hydrogen evolution reaction and promoting the desired NERR process. Ultimately, for the CuPo-NCDs NF catalyzed NERR, the FENH3 and the reaction potential both were boosted, the resultant energy efficiency of NERR reached a record-breaking value of 56.5%, and the NH3 yield rate increased by 7 times compared to NCDs. This study provides a novel catalyst with a new pathway to boost the NERR. A nitrogen-doped carbon dots modified nano-flower with enhanced interfacial proton-electron transfer was fabricated via an in situ assembly method. It could simultaneously boost the Faraday efficiency and reduce the reaction over-potential of NERR, improving the energy efficiency of NERR to a recording-breaking value of 56.5%. [Display omitted]</description><identifier>ISSN: 1001-8417</identifier><identifier>EISSN: 1878-5964</identifier><identifier>DOI: 10.1016/j.cclet.2022.107888</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Interfacial proton-electron transfer ; Nano-flower ; Nitrogen electro-reduction ; Nitrogen-doped carbon dots ; Self-assembly</subject><ispartof>Chinese chemical letters, 2023-06, Vol.34 (6), p.107888-411, Article 107888</ispartof><rights>2023</rights><rights>Copyright © Wanfang Data Co. Ltd. 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A formidable challenge in bringing NERR closer to the practical application is developing an electro-catalyst which can simultaneously improve the Faraday efficiency and reduce the reaction over-potential. Herein, we fabricated a catalyst of nitrogen-doped carbon dots modified copper-phosphate nanoflower petals (CuPo-NCDs NF) via a self-assembly method. The flower structure endowed the CuPo-NCDs NF with large specific surface area, and thus enabled more active sites to be exposed. In particular, we demonstrated that the NCDs modified CuPo petals with flower-like structure can accelerate the interfacial proton-electron transfer, suppressing the competing hydrogen evolution reaction and promoting the desired NERR process. Ultimately, for the CuPo-NCDs NF catalyzed NERR, the FENH3 and the reaction potential both were boosted, the resultant energy efficiency of NERR reached a record-breaking value of 56.5%, and the NH3 yield rate increased by 7 times compared to NCDs. This study provides a novel catalyst with a new pathway to boost the NERR. A nitrogen-doped carbon dots modified nano-flower with enhanced interfacial proton-electron transfer was fabricated via an in situ assembly method. It could simultaneously boost the Faraday efficiency and reduce the reaction over-potential of NERR, improving the energy efficiency of NERR to a recording-breaking value of 56.5%. 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This study provides a novel catalyst with a new pathway to boost the NERR. A nitrogen-doped carbon dots modified nano-flower with enhanced interfacial proton-electron transfer was fabricated via an in situ assembly method. It could simultaneously boost the Faraday efficiency and reduce the reaction over-potential of NERR, improving the energy efficiency of NERR to a recording-breaking value of 56.5%. [Display omitted]</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.cclet.2022.107888</doi><tpages>6</tpages></addata></record>
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subjects Interfacial proton-electron transfer
Nano-flower
Nitrogen electro-reduction
Nitrogen-doped carbon dots
Self-assembly
title Carbon dots modified nanoflower petals with super enhanced nitrogen electro-reduction efficiency
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