Novel Strontium/Iron Bimetallic Carbon Composites as Synergistic Catalyst for Oxygen Reduction Reaction in Microbial Fuel Cells

You Henghui; Shi Huihui; Arulmani Samuel Raj BabuLi HanZhong KengqiangWang YanDai YiHuang LeiGuo FeiZhang HongguoYan JiaXiao TangfuLiu XianjieSu Minhua

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Novel Strontium/Iron Bimetallic Carbon Composites as Synergistic Catalyst for Oxygen Reduction Reaction in Microbial Fuel Cells

机译：Novel Strontium/Iron Bimetallic Carbon Composites as Synergistic Catalyst for Oxygen Reduction Reaction in Microbial Fuel Cells

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Abstract It is critical to develop non-noble metal (NNM) electrocatalysts with excellent stability and innovative activity for oxygen reduction reaction (ORR) in the microbial fuel cells (MFCs), which is a promising energy conversion technology.?Herein, the preparation of iron carbide electrocatalysts (SrCO3/Fe3C) by the pyrolysis of a bimetal precursor (Sr and Fe) is proposed as a feasible strategy to realize a highly active electrocatalyst for ORR. Based on the catalytic potential of Sr-based materials, Fe species doping can provide more beneficial active sites for ORR. Concisely, the SrCO3/Fe3C(1:12) catalyst achieves the onset potential of 0.197?V (vs. Ag/AgCl) superior than Pt/C catalyst (0.193?V vs. Ag/AgCl) and the half-wave potential of??0.157?V (vs. Ag/AgCl) in 0.1-M KOH solution. Furthermore, the electrocatalyst exhibits nearly four-electron pathway, and generates less than 3 H2O2. Compared with Pt/C catalyst, it possesses preferable stability and superior methanol tolerance. Moreover, a composite electrode with SrCO3/Fe3C(1:12) as a catalyst on the carbon cloth demonstrated a superb air cathode in MFCs with a power density of 398.98 mW m?2, which can outperform than 10 wt Pt/C catalysts (342.13 mW m?2) on MFCs.Graphical abstract

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来源
《Electrocatalysis》 |2021年第6期|759-770|共12页
作者
You Henghui; Shi Huihui; Arulmani Samuel Raj BabuLi HanZhong KengqiangWang YanDai YiHuang LeiGuo FeiZhang HongguoYan JiaXiao TangfuLiu XianjieSu Minhua;
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作者单位

Guangzhou University;

University of Science and Technology of China;

Linköping University;

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原文格式 PDF
正文语种英语
中图分类化学动力学、催化作用;
关键词
SrCO3; Fe3C; Microbial fuel cells; Electrocatalyst; Oxygen reduction reaction; Sol–gel method;

Novel Strontium/Iron Bimetallic Carbon Composites as Synergistic Catalyst for Oxygen Reduction Reaction in Microbial Fuel Cells

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