Nickel B-site substitution in bulk Sr1−xCaxFeO3 perovskite oxygen carriers: Benefits and limitations

Eric J. Popczun,Ting Jia,Sittichai Natesakhawat,Wenqian Xu,Chris M. Marin,Yuhua Duan,Jonathan W. Lekse

Journal of Alloys and Compounds（2022）

Cited 4|Views13

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Abstract

•Mild nickel substitution (y < 0.125) increases oxygen redox kinetics> 50% at 400–500 °C.•Nickel substitution limited by structural stability.•The oxygen vacancy formation energy decreases with nickel substitution.•NiO bonds in Sr1−xCaxFe1−yNiyO3 are elongated compared to FeO.

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Key words

Sr1−xCaxFeO3 perovskites,Thermogravimetric analysis,Density functional theory (DFT),Oxygen carrier,Nickel substitution

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