Amorphization engineered VSe2−x nanosheets with abundant Se-vacancies for enhanced N2 electroreduction
Electrochemical N2 fixation through the nitrogen reduction reaction (NRR) is a promising route for sustainable NH3 synthesis, while exploring high-performance NRR catalysts lies at the heart of achieving high-efficiency NRR electrocatalysis. Herein, we reported the structural regulation of VSe2 by a...
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| Veröffentlicht in: | Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2022-01, Vol.10 (4), p.1742-1749 |
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| container_title | Journal of materials chemistry. A, Materials for energy and sustainability |
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| creator | Luo, Yaojing Li, Qingqing Tian, Ye Liu, Yaping Chu, Ke |
| description | Electrochemical N2 fixation through the nitrogen reduction reaction (NRR) is a promising route for sustainable NH3 synthesis, while exploring high-performance NRR catalysts lies at the heart of achieving high-efficiency NRR electrocatalysis. Herein, we reported the structural regulation of VSe2 by amorphization engineering, which simultaneously triggered the enriched Se-vacancies. The developed amorphous VSe2−x nanosheets with abundant Se-vacancies (a-VSe2−x) delivered a much enhanced NRR activity with an NH3 yield of 65.7 μg h−1 mg−1 and a faradaic efficiency of 16.3% at −0.4 V, being 8.8- and 3.5-fold higher than those of their crystalline counterparts, respectively. Density functional theory computations combined with molecular dynamics simulations revealed that the amorphization-triggered Se-vacancies could induce the upraised d-band center of unsaturated V atoms, capable of promoting the binding of key *N2/*NNH species to result in an energetically favorable NRR process. |
| doi_str_mv | 10.1039/d1ta06746j |
| format | Article |
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| ispartof | Journal of materials chemistry. A, Materials for energy and sustainability, 2022-01, Vol.10 (4), p.1742-1749 |
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| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Ammonia Amorphization Catalysts Chemical reduction Chemical synthesis Density functional theory Electrochemistry Molecular dynamics Nanosheets Nitrogen fixation Nitrogenation Vacancies |
| title | Amorphization engineered VSe2−x nanosheets with abundant Se-vacancies for enhanced N2 electroreduction |
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