首页|REMnO3(RE=Pr,Nd,Sm,Eu,Gd)perovskite as efficient catalysts for oxygen reduction reaction

REMnO3(RE=Pr,Nd,Sm,Eu,Gd)perovskite as efficient catalysts for oxygen reduction reaction

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Rare earth metal based perovskite emerges as important catalytic material for energy production and storage.These ABO3 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 REMnO3(RE=Pr,Nd,Sm,Eu and Gd).The one-dimensional REMnO3 prepared by the hydrothermal synthesis route results in pure phase perovskite on calcinations.The perovskite was characterized 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 vari-ation in REMnO3 on oxygen reduction reaction is discussed.SmMnO3 showed better onset potential for oxygen reduction reaction among the prepared rare earth perovskite.SmMnO3 having high RE:Mn ratio(A-site rich compositions)promotes oxygen reduction reaction(ORR)activity.All the perovskites showed good oxygen reduction property with high stability and methanol tolerance.

REMnO3PerovskiteOxygen reduction reaction(ORR)Electrocatalytic activitySmMnO3Rare earths

Rakesh Ranjan Mahalik、Siba Soren、Ipsha Hota、A.K.Debnath、K.P.Muthe、Purnendu Parhi

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Department of Chemistry,Ravenshaw University,Cuttack,Odisha,753003,India

Technical Physics Division,Bhabha Atomic Research Centre,Mumbai,400085,India

Council of Scientific & Industrial ResearchCentre of Excellence in Environment and Public Health by the Higher Education Department,Government of Odisha

01/3089/2126913/HED/HE-PTC-WB-02-17

2024

10.1016/j.jre.2023.10.025

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(11)