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Issue 68, 2016
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Influence of transition metal electronegativity on the oxygen storage capacity of perovskite oxides

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Abstract

The selection of highly efficient oxygen carriers (OCs) is a key step necessary for the practical development of chemical looping combustion (CLC). In this study, a series of ABO3 perovskites, where A = La, Ba, Sr, Ca and B = Cr, Mn, Fe, Co, Ni, Cu, are synthesized and tested in a fixed bed reactor for reactivity and stability as OCs with CH4 as the fuel. We find that the electronegativity of the transition metal on the B-site (λB), is a convenient descriptor for oxygen storage capacity (OSC) of our perovskite samples. By plotting OSC for total methane oxidation against λB, we observe an inverted volcano plot relationship. These results could provide useful guidelines for perovskite OC design and their other energy related applications.

Graphical abstract: Influence of transition metal electronegativity on the oxygen storage capacity of perovskite oxides

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Publication details

The article was received on 07 Mar 2016, accepted on 20 Jul 2016 and first published on 21 Jul 2016


Article type: Communication
DOI: 10.1039/C6CC01997H
Citation: Chem. Commun., 2016,52, 10369-10372
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    Influence of transition metal electronegativity on the oxygen storage capacity of perovskite oxides

    L. Liu, D. D. Taylor, E. E. Rodriguez and M. R. Zachariah, Chem. Commun., 2016, 52, 10369
    DOI: 10.1039/C6CC01997H

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