Issue 68, 2016
From the journal:

Chemical Communications

Influence of transition metal electronegativity on the oxygen storage capacity of perovskite oxides†

Lu Liu,a   Daniel D. Taylor,b   Efrain E. Rodrigueza  and  Michael R. Zachariah*ac  

* Corresponding authors

a Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
E-mail: mrz@umd.edu

b Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA

c Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20742, USA

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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Article information

DOI
https://doi.org/10.1039/C6CC01997H
Article type
Communication
Submitted
07 Mar 2016
Accepted
20 Jul 2016
First published
21 Jul 2016

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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