Academic Journal
Ultrasonic Plasma Engineering Toward Facile Synthesis of Single-Atom M-N4/N-Doped Carbon (M = Fe, Co) as Superior Oxygen Electrocatalyst in Rechargeable Zinc–Air Batteries
| العنوان: | Ultrasonic Plasma Engineering Toward Facile Synthesis of Single-Atom M-N4/N-Doped Carbon (M = Fe, Co) as Superior Oxygen Electrocatalyst in Rechargeable Zinc–Air Batteries |
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| المؤلفون: | Kai Chen, Seonghee Kim, Minyeong Je, Heechae Choi, Zhicong Shi, Nikola Vladimir, Kwang Ho Kim, Oi Lun Li |
| المصدر: | Nano-Micro Letters, Vol 13, Iss 1, Pp 1-20 (2021) |
| بيانات النشر: | SpringerOpen, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Technology |
| مصطلحات موضوعية: | Single-atom-doped M-N4/NC catalyst, Plasma engineering, ORR/OER bifunctional activity, DFT calculation, Rechargeable Zn–air battery, Technology |
| الوصف: | Abstract As bifunctional oxygen evolution/reduction electrocatalysts, transition-metal-based single-atom-doped nitrogen–carbon (NC) matrices are promising successors of the corresponding noble-metal-based catalysts, offering the advantages of ultrahigh atom utilization efficiency and surface active energy. However, the fabrication of such matrices (e.g., well-dispersed single-atom-doped M-N4/NCs) often requires numerous steps and tedious processes. Herein, ultrasonic plasma engineering allows direct carbonization in a precursor solution containing metal phthalocyanine and aniline. When combining with the dispersion effect of ultrasonic waves, we successfully fabricated uniform single-atom M-N4 (M = Fe, Co) carbon catalysts with a production rate as high as 10 mg min−1. The Co-N4/NC presented a bifunctional potential drop of ΔE = 0.79 V, outperforming the benchmark Pt/C-Ru/C catalyst (ΔE = 0.88 V) at the same catalyst loading. Theoretical calculations revealed that Co-N4 was the major active site with superior O2 adsorption–desorption mechanisms. In a practical Zn–air battery test, the air electrode coated with Co-N4/NC exhibited a specific capacity (762.8 mAh g−1) and power density (101.62 mW cm−2), exceeding those of Pt/C-Ru/C (700.8 mAh g−1 and 89.16 mW cm−2, respectively) at the same catalyst loading. Moreover, for Co-N4/NC, the potential difference increased from 1.16 to 1.47 V after 100 charge–discharge cycles. The proposed innovative and scalable strategy was concluded to be well suited for the fabrication of single-atom-doped carbons as promising bifunctional oxygen evolution/reduction electrocatalysts for metal–air batteries. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2311-6706 2150-5551 |
| Relation: | https://doaj.org/toc/2311-6706; https://doaj.org/toc/2150-5551 |
| DOI: | 10.1007/s40820-020-00581-4 |
| URL الوصول: | https://doaj.org/article/96d02d64e20f4ca9b21749395a2601ab |
| رقم الانضمام: | edsdoj.96d02d64e20f4ca9b21749395a2601ab |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 23116706 21505551 |
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| DOI: | 10.1007/s40820-020-00581-4 |