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Issue 2, 2015
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Carbon-coating functionalized La0.6Sr1.4MnO4+δ layered perovskite oxide: enhanced catalytic activity for the oxygen reduction reaction

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Abstract

Efficient electrocatalysts for the oxygen reduction reaction (ORR) is a critical factor to influence the performance of lithium–oxygen batteries. In this study, La0.6Sr1.4MnO4+δ layered perovskite oxide as a highly active electrocatalyst for the ORR has been prepared, and a carbon-coating layer with thickness <5 nm has been successfully introduced to enhance the electronic conductivity of the as-prepared oxide. XRD, XPS, Raman, SEM and TEM measurements were carried out to characterize the crystalline structure and morphology of these samples. Rotating ring-disk electrode (RRDE) technique has been used to study catalytic activities of the as-prepared catalysts for the ORR in 0.1 M KOH media. RRDE results reveal that carbon-coated La0.6Sr1.4MnO4+δ exhibits better catalytic activity for the ORR. For the carbon-coated La0.6Sr1.4MnO4+δ, the ORR proceeds predominately via a direct four electron process, and a maximum cathodic current density of 6.70 mA cm−2 at 2500 rpm has been obtained, which is close to that of commercial Pt/C electrocatalyst under the same testing conditions.

Graphical abstract: Carbon-coating functionalized La0.6Sr1.4MnO4+δ layered perovskite oxide: enhanced catalytic activity for the oxygen reduction reaction

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Publication details

The article was received on 01 Oct 2014, accepted on 26 Nov 2014 and first published on 26 Nov 2014


Article type: Paper
DOI: 10.1039/C4RA11588K
Citation: RSC Adv., 2015,5, 974-980
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    Carbon-coating functionalized La0.6Sr1.4MnO4+δ layered perovskite oxide: enhanced catalytic activity for the oxygen reduction reaction

    Y. Wang, Z. Yang, F. Lu, C. Jin, J. Wu, M. Shen, R. Yang and F. Chen, RSC Adv., 2015, 5, 974
    DOI: 10.1039/C4RA11588K

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