REMnO_(3)(RE=Pr,Nd,Sm,Eu,Gd) perovskite as efficient catalysts for oxygen reduction reaction  

作　　者：Rakesh Ranjan Mahalik Siba Soren Ipsha Hota A.K.Debnath K.P.Muthe Purnendu Parhi 

机构地区：[1]Department of Chemistry,Ravenshaw University,Cuttack,Odisha,753003,India [2]Technical Physics Division,Bhabha Atomic Research Centre,Mumbai,400085,India

出　　处：《Journal of Rare Earths》2024年第11期2078-2087,I0003,共11页稀土学报（英文版）

基　　金：Project supported by Council of Scientific&Industrial Research (01/3089/21);the Centre of Excellence in Environment and Public Health by the Higher Education Department,Government of Odisha (Grant No.:26913/HED/HE-PTC-WB-02-17)。

摘　　要：Rare earth metal based perovskite emerges as important catalytic material for energy production and storage.These ABO_(3) type materials are now the focus of research in the field of oxygen reduction and evolution reactions.Here,in this work we evaluated the oxygen reduction properties of the synthesized one-dimensional REMnO_(3)(RE=Pr,Nd,Sm,Eu and Gd).The one-dimensional REMnO_(3) prepared by the hydrothermal synthesis route results in pure phase perovskite on calcinations.The perovskite was characte rized with X-ray diffraction,Fourier transform-infrared(FT-IR),field emission-scanning electron microscopy(FE-SEM),transmission electron microscopy(TEM) and X-ray photoelectron spectroscopy(XPS).The oxygen reduction reaction activities were investigated with the help of electrochemical workstation that consists of three-electrode system immersed in 0.1 mol/L KOH electrolyte solution saturated with oxygen.The Koutechy-Levich plot obtained from rotating ring disk electrode shows all the prepared catalysts follow 4e^(-)processes during oxygen reduction.The effect of "A" site cation variation in REMnO3 on oxygen reduction reaction is discussed.SmMnO_(3) showed better onset potential for oxygen reduction reaction among the prepared rare earth perovskite.SmMnO_(3) having high RE:Mn ratio(A-site rich co mpositions) promotes oxygen reduction reaction(ORR) activity.All the perovs kites showed good oxygen reduction property with high stability and methanol tolerance.

关 键 词：REMnO_(3) PEROVSKITE Oxygen reduction reaction(ORR) Electrocatalytic activity SmMnO_(3) Rare earths 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]