文献类型：期刊文献

中文题名：Boost oxygen reduction reaction performance by tuning the active sites in Fe-N-P-C catalysts

作者：Yahao Li[1,2];Ketao Zang[4];Xuezhi Duan[3];Jun Luo[4];De Chen[1]

机构：[1]Department of Chemical Engineering,Norwegian University of Science and Technology,N-7491 Trondheim,Norway;[2]State Key Laboratory of Silicon Materials,Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province,and Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China;[3]State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;[4]Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous Materials,Institute for New Energy Materials&Low-Carbon Technologies,School of Materials,Tianjin University of Technology,Tianjin 300384,China

年份：2021

卷号：30

期号：4

起止页码：572

中文期刊名：Journal of Energy Chemistry

外文期刊名：能源化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；

基金：The financial supports from Department of Chemical Engineering;the support from China Scholarship Council(CSC)for his study at NTNU。

语种：英文

中文关键词：Oxygen reduction reaction;Fe electrocatalyst;Atomically dispersed active center;Activity tuning;Zn-air battery

摘要：Cost-effective atomically dispersed Fe-N-P-C complex catalysts are promising to catalyze the oxygen reduction reaction(ORR)and replace Pt catalysts in fuel cells and metal-air batteries.However,it remains a challenge to increase the number of atomically dispersed active sites on these catalysts.Here we report a highly efficient impregnation-pyrolysis method to prepare effective ORR electrocatalysts with large amount of atomically dispersed Fe active sites from biomass.Two types of active catalyst centers were identified,namely atomically dispersed Fe sites and Fe_(x)P particles.The ORR rate of the atomically dispersed Fe sites is three orders of magnitude higher than it of Fe_(x)P particles.A linear correlation between the amount of the atomically dispersed Fe and the ORR activity was obtained,revealing the major contribution of the atomically dispersed Fe to the ORR activity.The number of atomically dispersed Fe increases as the Fe loading increased and reaching the maximum at 1.86 wt%Fe,resulting in the maximum ORR rate.Optimized Fe-N-P-C complex catalyst was used as the cathode catalyst in a homemade Zn-air battery and good performance of an energy density of 771 Wh kgZn^(-1),a power density of 92.9 m W cm^(-2) at 137 m A cm^(-2) and an excellent durability were exhibited.