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

作     者：Yahao Li Ketao Zang Xuezhi Duan Jun Luo De Chen Yahao Li;Ketao Zang;Xuezhi Duan;Jun Luo;De Chen

作者机构：Department of Chemical EngineeringNorwegian University of Science and TechnologyN-7491 TrondheimNorway State Key Laboratory of Silicon MaterialsKey Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina State Key Laboratory of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous MaterialsInstitute for New Energy Materials&Low-Carbon TechnologiesSchool of MaterialsTianjin University of TechnologyTianjin 300384China 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2021年第30卷第4期

页      面：572-579页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

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

主　　题：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 ***,it remains a challenge to increase the number of atomically dispersed active sites on these *** we report a highly efficient impregnation-pyrolysis method to prepare effective ORR electrocatalysts with large amount of atomically dispersed Fe active sites from *** types of active catalyst centers were identified,namely atomically dispersed Fe sites and Fe_(x)P *** 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 *** 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 *** 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.