Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1016/j.cej.2021.133190

Ключевые слова: ammonia energy, electrocatalysis, nitrate reduction, sewage purification, single-atom ni, synthetic ammonia

Аннотация: Electrochemical synthesis of ammonia driven by clean energy is expected to realize the supply of ammonia for distributed production of industry and agriculture. Here, nickel nanoparticles and nickel in the form of single atoms were simultaneously anchored on the electrochemically active carrier BCN matrix through a structured domaiПоказать полностьюn strategy, which realized a high-efficiency, high-value-added, conversion of nitrate in sewage. Specifically, the electrochemical nitrate reduction reaction (NIRR) driven by BCN@Ni in alkaline media achieves an ammonia yield rate as high as 2320.2 μg h−1 cm−2 (at −0.5 V vs RHE), and Faraday efficiency as high as 91.15% (at −0.3 V vs RHE). Even in neutral and acidic media, the ammonia yield rates of NIRR driven by BCN@Ni are as high as 1904.2 μg h−1 cm−2 and 2057.4 μg h−1 cm−2, respectively (at −0.4 V vs RHE). The 15NO3- isotope labeling experiment verified that the recorded ammonia all came from the electrochemical reduction of NO3– on BCN@Ni. Density functional theory (DFT) calculations show that both nano-Ni and single-atom Ni in BCN@Ni have the ability to electrochemically convert NO3– into NH3, and that the addition of BCN can further promote the NIRR on Ni. © 2021 Elsevier B.V.

Журнал: Chemical Engineering Journal

Номера страниц: 133190

ISSN журнала: 13858947

Издатель: Elsevier B.V.

• Zhao X. (Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, China, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China)
• Zhu Z. (Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, China)
• He Y. (Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, China)
• Zhang H. (College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China)
• Zhou X. (College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China)
• Hu W. (Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, China)
• Li M. (College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450000, China)
• Zhang S. (College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450000, China)
• Dong Y. (State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China)
• Hu X. (School of Materials Science and Engineering, University of Jinan, Jinan, 250022, China)
• Kuklin A.V. (International Research Center of Spectroscopy and Quantum Chemistry (IRC SQC), Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation, Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala, SE-751 20, Sweden)
• Baryshnikov G.V. (Laboratory of Organic Electronics, ITN, Linköping University, Norrköping, 601 74, Sweden)
• Ågren H. (Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala, SE-751 20, Sweden)
• Wågberg T. (Department of Physics, Umeå University, Umeå, SE-90187, Sweden)
• Hu G. (Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, China)

• Scopus