MoC nanocrystals confined in N-doped carbon nanosheets toward highly selective electrocatalytic nitric oxide reduction to ammonia
Abstract Electrochemical nitric oxide reduction reaction (NORR) to produce ammonia ($ NH_{3} $) under ambient conditions is a promising alternative to the energy and carbon-intensive Haber-Bosch approach, but its performance is still improved. Herein, molybdenum carbides (MoC) nanocrystals confined by nitrogen-doped carbon nanosheets are first designed as an efficient and durable electrocatalyst for catalyzing the reduction of NO to $ NH_{3} $ with maximal Faradaic efficiency of 89% ± 2% and a yield rate of 1,350 ± 15 µg·$ h^{−1} $·$ cm^{−2} $ at the applied potential of −0.8 V vs. reversible hydrogen electrode (RHE) as well as high stable activity with negligible current density and $ NH_{3} $ yield rate decays over a 30 h continue the test. Moreover, as a proof-of-concept of Zn−NO battery, it achieves a peak power density of 1.8 mW·$ cm^{−2} $ and a large $ NH_{3} $ yield rate of 782 ± 10 µg·$ h^{−1} $·$ cm^{−2} $, which are comparable to the best-reported results. Theoretical calculations reveal that the MoC(111) has a strong electronic interaction with NO molecules and thus lowering the energy barrier of the potential-determining step and suppressing hydrogen evolution kinetics. This work suggests that Mo-based materials are a powerful platform providing great opportunities to explore highly selective and active catalysts for $ NH_{3} $ production..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:15 |
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| Enthalten in: |
Nano research - 15(2022), 10 vom: 18. Aug., Seite 8890-8896 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Meng, Ge [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Themen: |
Ammonia electrosynthesis |
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| Anmerkungen: |
© Tsinghua University Press 2022 |
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| doi: |
10.1007/s12274-022-4747-y |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 245 | 1 | 0 | |a MoC nanocrystals confined in N-doped carbon nanosheets toward highly selective electrocatalytic nitric oxide reduction to ammonia |
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| 520 | |a Abstract Electrochemical nitric oxide reduction reaction (NORR) to produce ammonia ($ NH_{3} $) under ambient conditions is a promising alternative to the energy and carbon-intensive Haber-Bosch approach, but its performance is still improved. Herein, molybdenum carbides (MoC) nanocrystals confined by nitrogen-doped carbon nanosheets are first designed as an efficient and durable electrocatalyst for catalyzing the reduction of NO to $ NH_{3} $ with maximal Faradaic efficiency of 89% ± 2% and a yield rate of 1,350 ± 15 µg·$ h^{−1} $·$ cm^{−2} $ at the applied potential of −0.8 V vs. reversible hydrogen electrode (RHE) as well as high stable activity with negligible current density and $ NH_{3} $ yield rate decays over a 30 h continue the test. Moreover, as a proof-of-concept of Zn−NO battery, it achieves a peak power density of 1.8 mW·$ cm^{−2} $ and a large $ NH_{3} $ yield rate of 782 ± 10 µg·$ h^{−1} $·$ cm^{−2} $, which are comparable to the best-reported results. Theoretical calculations reveal that the MoC(111) has a strong electronic interaction with NO molecules and thus lowering the energy barrier of the potential-determining step and suppressing hydrogen evolution kinetics. This work suggests that Mo-based materials are a powerful platform providing great opportunities to explore highly selective and active catalysts for $ NH_{3} $ production. | ||
| 650 | 4 | |a ammonia electrosynthesis | |
| 650 | 4 | |a green route | |
| 650 | 4 | |a molybdenum carbides (MoC) nanocrystals | |
| 650 | 4 | |a nitric oxide reduction reaction | |
| 650 | 4 | |a high selectivity | |
| 700 | 1 | |a Jin, Mengmeng |4 aut | |
| 700 | 1 | |a Wei, Tianran |4 aut | |
| 700 | 1 | |a Liu, Qian |4 aut | |
| 700 | 1 | |a Zhang, Shusheng |4 aut | |
| 700 | 1 | |a Peng, Xianyun |4 aut | |
| 700 | 1 | |a Luo, Jun |4 aut | |
| 700 | 1 | |a Liu, Xijun |4 aut | |
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