Jump to main content
Jump to site search

Issue 21, 2016
Previous Article Next Article

Synthesis of high surface area CaxLa(1−x)Al(1−x)MnxO(3−δ) perovskite oxides for oxygen reduction electrocatalysis in alkaline media

Author affiliations

Abstract

A series of perovskite oxide type catalysts with composition CaxLa1−xAl1−xMnxO1−δ were synthesized using solid state reaction, hybrid sol–gel, and aerogel synthesis techniques. The prepared catalyst materials were characterized with a suite of characterization techniques to determine morphology and composition. Electrochemical measurements for oxygen reduction reaction (ORR) activity in alkaline solution were performed using rotating disk electrode (RDE). ORR mass activity increased with increasing Brunauer–Emmett–Teller (BET) surface area, following the trend of solid state reaction < hybrid sol–gel < aerogel, when maintaining equal calcination time and temperature among all samples. Results also indicate a strong correlation between ORR specific activity and compositional homogeneity observed through transmission electron microscopy (TEM) with energy dispersive spectroscopy (EDS) mapping and X-ray photoelectron spectroscopy (XPS). Specifically, lower surface area materials produced by solid state reaction showed the highest compositional homogeneity and demonstrated highest specific activity. Performance tradeoffs are discussed relating surface area, compositional homogeneity at the oxide surface, and ORR activity.

Graphical abstract: Synthesis of high surface area CaxLa(1−x)Al(1−x)MnxO(3−δ) perovskite oxides for oxygen reduction electrocatalysis in alkaline media

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 12 Jul 2016, accepted on 15 Sep 2016 and first published on 19 Sep 2016


Article type: Paper
DOI: 10.1039/C6CY01497F
Citation: Catal. Sci. Technol., 2016,6, 7744-7751
  •   Request permissions

    Synthesis of high surface area CaxLa(1−x)Al(1−x)MnxO(3−δ) perovskite oxides for oxygen reduction electrocatalysis in alkaline media

    J. M. Christ, C. Ngo, T. Batson, C. A. Cadigan, J. Tong, R. M. Richards, R. O'Hayre and S. Pylypenko, Catal. Sci. Technol., 2016, 6, 7744
    DOI: 10.1039/C6CY01497F

Search articles by author