| Autor: |
Zhaozhao Zhu, Zhao Li, Junjie Wang, Rong Li, Haiyuan Chen, Yulan Li, Jun Song Chen, Rui Wu, Zidong Wei |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
eScience, Vol 2, Iss 4, Pp 445-452 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2667-1417 |
| DOI: |
10.1016/j.esci.2022.05.002 |
| Popis: |
Even though various nickel–nitrogen–carbon (Ni-N-C) combinations are prospective low-cost catalysts for the CO2 electroreduction reaction (CO2RR), which is one avenue for attaining carbon neutrality, the detailed role of different N species has hardly been investigated. Here, we report a hollow porous N-doped carbon nanofiber with NiNX-pyridinic N active species (denoted as h-Ni-N-C) developed using a facile electrospinning and SiO2 space-confined pyrolysis strategy. The NiNX-pyridinic N species are facilely generated during the pyrolysis process, giving rise to enhanced activity and selectivity for the CO2RR. The optimized h-Ni-N-C exhibits a high CO Faradaic efficiency of 91.3% and a large current density of −15.1 mA cm−2 at −0.75 V versus reversible hydrogen electrode in an H-cell. Density functional theory (DFT) results show that NiN4-pyridinic N species demonstrate a lower free energy for the catalyst's rate-determining step than isolated NiN4 and pyridinic N species, without affecting the desorption of CO∗ intermediate. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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