Mn-doped perovskite-type oxide LaFeO3 as highly active and durable bifunctional electrocatalysts for oxygen electrode reactions  

作　　者：Jingze ZHANG Sheng ZHU Yulin MIN Qunjie XU 

机构地区：[1]Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems,Shanghai University of Electric Power,Shanghai 200090,China [2]Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China

出　　处：《Frontiers of Materials Science》2020年第4期459-468,共10页材料学前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grants Nos.91745112,21604051,21671133 and 21507081);the Science and Technology Commission of Shanghai Municipality(Grant Nos.19DZ2271100,18020500800 and 18JC1412900).

摘　　要：Perovskite oxides based on the alkaline earth metal lanthanum for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)in alkaline electrolytes are promising catalysts,but their catalytic activity and stability remain unsatisfactory.Here,we synthesized a series of LaFe1-xMn2O3(x=0,0.1,0.3,0.5,0.7,0.9 and 1)perovskite oxides by doping Mn into LaFeO3(LF).The results show that the doping amount of Mn has a significant effect on the catalytic performance.When x=0.5,the catalyst LaFeo.sMno.sO3(LFM)exhibits the best performance.The limiting current density in 0.1 mol·L^-1 KOH solution is 7 mA·cm^-2,much larger than that of the commercial Pt/C catalyst(5.5 mA·cm^-2).Meanwhile,the performance of the doped catalyst is also superior to that of commercial Pt/C in terms of the long-term durability.The excellent catalytic performance of LFM may be ascribed to its abundant 0^2-/0^-species and low charge transfer resistance after doping the Mn element.

关 键 词：oxygen electrode reaction oxygen reduction reaction oxygen evolution reaction perovskite ELECTROCATALYST LAFEO3 

分 类 号：O64[理学—物理化学]