Biomass-derived nitrogen self-doped porous carbon as effective metal-free catalysts for oxygen reduction reaction

Nanoscale
Xiaojun LiuShaowei Chen

Abstract

Biomass-derived nitrogen self-doped porous carbon was synthesized by a facile procedure based on simple pyrolysis of water hyacinth (eichhornia crassipes) at controlled temperatures (600-800 °C) with ZnCl2 as an activation reagent. The obtained porous carbon exhibited a BET surface area up to 950.6 m(2) g(-1), and various forms of nitrogen (pyridinic, pyrrolic and graphitic) were found to be incorporated into the carbon molecular skeleton. Electrochemical measurements showed that the nitrogen self-doped carbons possessed a high electrocatalytic activity for ORR in alkaline media that was highly comparable to that of commercial 20% Pt/C catalysts. Experimentally, the best performance was identified with the sample prepared at 700 °C, with the onset potential at ca. +0.98 V vs. RHE, that possessed the highest concentrations of pyridinic and graphitic nitrogens among the series. Moreover, the porous carbon catalysts showed excellent long-term stability and much enhanced methanol tolerance, as compared to commercial Pt/C. The performance was also markedly better than or at least comparable to the leading results in the literature based on biomass-derived carbon catalysts for ORR. The results suggested a promising route based on eco...Continue Reading

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Citations

Oct 26, 2018·Environmental Science and Pollution Research International·Jirui YangXinhua Qi
Dec 28, 2018·Advanced Materials·Zhengping ZhangFeng Wang
Dec 6, 2017·Advanced Materials·Maryam BorgheiOrlando J Rojas
Nov 18, 2018·Advanced Materials·Tao Zhang, Tewodros Asefa
Aug 7, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Karan ChaudharyDhanraj T Masram
Nov 8, 2020·The Science of the Total Environment·Zhengtai ZhaShihao Chen
Jul 12, 2021·Journal of Environmental Management·Xiangzhou YuanYong Sik Ok

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