Poly(ionic liquids) derived N, S co-doped carbon nanorod from in situ and template-free method as an efficient metal-free bifunctional electrocatalysts for direct methanol fuel cells

Qu, Yongfang ¹Zhang, Wei ¹Guang, Binxiong ¹Xiao, Yahui ¹Liu, Xuejun ¹Zhai, Cuiping ¹Liu, Yong¹

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作者信息

1. Henan Univ
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Abstract

Developing highly efficient strategy for fabrication of bifunctional electrocatalysts for oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) is a challenging topic. In this work, we reported the in situ synthesis of N, S co-doped carbon nanorod material (N/S-C) by the facile template-free, one-step pyrolysis approach using N and S co-containing poly(ionic liquid) (PIL) of p[BZ][HSO4](2) as precursor derived from the simple chemically oxidative polymerization of ionic liquid benzidine sulfate ([BZ][HSO4](2)) in the presence of ammonium persulfate as oxidant. The N/S-C catalysts have nanorod morphology with hierarchical porous architectures of abundant micropores and well-defined mesopores featuring high specific surface areas. The ORR performance of N/S-C-800 is extremely satisfactory in alkaline media with the onset and half-potentials of 0.985 V and 0.857 V (vs. RHE), respectively, which are comparable to that of commercial Pt/C (0.990 V and 0.852 V vs. RHE). It also delivers the favorable long-term stability and methanol tolerance, significantly outperforming commercial Pt/C. Moreover, the N/S-C-800 was served as a support for Pt nanoparticles, showing the higher methanol electrooxidation activity (806.74 mA mg(Pt)(-1)) compared with commercial Pt/C (356.32 mA mg(Pt)(-1)). These results show an effective route to design the attractive metal-free carbon-based electrocatalysts for direct methanol fuel cells. (C) 2022 Elsevier B.V. All rights reserved.

Key words

N/S co-doped carbon/Poly(ionic liquids)/Template-free/Oxygen reduction reaction/Methanol oxidation/OXYGEN REDUCTION REACTION/CODOPED POROUS CARBON/ORR ELECTROCATALYST/ETHYLENE-GLYCOL/GREEN SYNTHESIS/IONIC LIQUID/NITROGEN/SULFUR/OXIDATION/GRAPHENE

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出版年

2022

Journal of Alloys and Compounds

EISCI

ISSN：0925-8388

被引量12

参考文献量56

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