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Redox inactive ions meliorated BaCo0.5-xFe0.5-xZrxYxO3-δ perovskite oxides as efficient electrocatalysts for oxygen evolution reaction

Abstract

Exploring competent electrocatalysts for oxygen evolution reaction (OER) is central to the development of clean, reliable and emission-free hydrogen economy. Perovskites have been seen as promising OER electrocatalysts among all the potential candidates so far. Here, we introduced redox inactive Zr and Y ions to meliorate the redox capability of active ions and prepared BaCo0.5-xFe0.5-xZrxYxO3-δ (BCF(ZY)x, x = 0.05-0.10) oxides as efficient electrocatalysts for OER. The catalyst of BCF(ZY)0.1 exhibits a higher OER activity (including disk activity, intrinsic activity and mass activity) and better durability than gold-standard OER electrocatalyst IrO2 and the well-known Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) perovskite. The overpotential to deliver an electrode current density of 10 mA cm-2 of BCF(ZY)0.1 oxide is merely 0.32 V in 1 M KOH, and the intrinsic activity of BCF(ZY)0.1 is ~52 times higher than IrO2. The outstanding electro-catalytic activity and stability of BCF(ZY)0.1 are attributed to the increased redox ability compared with BSCF, including the faster charge transfer process, much more facile adsorption of OH- and desorption of O2.

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Publication details

The article was received on 12 Jun 2018, accepted on 07 Aug 2018 and first published on 07 Aug 2018


Article type: Communication
DOI: 10.1039/C8TA05599H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Redox inactive ions meliorated BaCo0.5-xFe0.5-xZrxYxO3-δ perovskite oxides as efficient electrocatalysts for oxygen evolution reaction

    X. Li, J. Zhang, Q. Feng, C. Pu, L. Zhang, M. Hu, X. Zhou, X. Zhong, W. Yi, J. Tang, Z. Li, X. Zhao, H. Li and B. Xu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05599H

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