期刊
DIAMOND AND RELATED MATERIALS
卷 121, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2021.108742
关键词
Oxygen reduction reaction; Electrocatalyst; N-doped carbon; Biomass; Pyrolysis
类别
资金
- Guangdong Provincial Key Laboratory of Distributed Energy Systems [2020B1212060075]
- Guangdong Higher Education Institutes [2016GCZX009]
- National Natural Science Foundation of China [21905044]
- Natural Science Foundation of Guangdong Province [2018A030310004]
- Guangdong Basic and Applied Basic Research Foundation [2019A1515110757, 2020A1515110881]
- High-level Talents Project of Dongguan University of Technology [KCY-KYQD2017017]
- Key projects of social science and technology development in Dongguan [2020507140154]
This paper presents a green strategy for synthesizing nitrogen-doped porous carbon using spermacoce latifolia leaf as a precursor. The resulting carbon material exhibits a high specific surface area, abundant mesopores, and doped nitrogen, showing excellent oxygen reduction reaction (ORR) performance and long-term stability.
Biomass-derived N-doped carbon as oxygen reduction reaction (ORR) catalyst has captured great attention, for its low-cost, environment-friendly and high-activity. However, most preparations of biomass-derived N-doped carbon expend a lot of fossil nitrogen compounds and corrosivity chemical activators. Herein, this paper proposes a green strategy using spermacoce latifolia leaf as precursor without any additive by direct pyrolyzing to N-doped porous carbon. The as-synthesized spermacoce latifolia-derived carbon (SL-C-800) make a feature of high specific surface area (274.12 m2 g-1), abundant mesoporous, and rich doped nitrogen. The optimal SL-C-800 exhibits high four-electron ORR selectivity with high half-wave potential of 0.75 V, and long-term stability in alkaline medium, which is same to N-doped carbon nanotube. The experiments indicate that graphitic-N is the main active sites, while abundant mesoporous facilitates the O2 diffusion. Additionally, other porous carbons were synthesized by the same method, also exhibited excellent ORR performance. This work offers a new approach to design and synthesize carbon catalysts for ORR.
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