Biomass derived Fe-N/C catalyst for efficiently catalyzing oxygen reduction reaction in both alkaline and neutral pH conditions
Biomass derived Fe-N/C catalyst for efficiently catalyzing oxygen reduction reaction in both alkaline and neutral pH conditions作者机构：Laboratory of Water Pollution RemediationSchool of Life and Environmental SciencesHangzhou Normal UniversityHangzhou 311121China
出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)
年 卷 期：2023年第34卷第1期
页 面：465-468页
核心收录：
学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：the National Natural Science Foundation of China(No.51908172)for the support of this study。
主 题：Fe-N/C Oxygen reduction reaction Biomass Fe coordination Polyphenol
摘 要：Fe-N/C is a promising oxygen reduction reaction(ORR)catalyst to substitute the current widely used precious metal platinum.Cost-effectively fabricating the Fe-N/C material with high catalytic activity and getting in-depth insight into the responsible catalytic site are of great significance.In this work,we proposed to use biomass,tea leaves waste,as the precursor to prepare ORR catalyst.By adding 5%FeCl3(wt%)into tea precursor,the pyrolysis product(i.e.,5%Fe-N/C)exhibited an excellent four-electron ORR activity,whose onset potential was only 10 m V lower than that of commercial Pt/C.The limiting current density of 5%Fe-N/C(5.75 m A/cm^(2))was even higher than Pt/C(5.44 m A/cm^(2)).Compared with other biomass or metal organic frameworks derived catalysts,5%Fe-N/C showed similar ORR activity.Also,both the methanol tolerance and material stability performances of as-prepared 5%Fe-N/C catalyst were superior to that of Pt/C.X-ray adsorption fine structure characterization revealed that the FeN4O2might be the possible catalytic site.An appropriate amount of iron chloride addition not only facilitated catalytic site formation,but also enhanced material conductivity and reaction kinetics.The results of this work may be useful for the Fe based transition metal ORR catalyst design and application.
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