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- In relation to this article, we declare that there is no conflict of interest.
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Received April 26, 2026
Accepted June 10, 2026
Available online October 25, 2026
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Elucidating the Catalytic Activity of Lattice-Distorted Double Perovskite Oxides as Bifunctional Electrocatalysts
https://doi.org/10.1007/s11814-026-00770-8
Abstract
The overall performance of aqueous metal-air batteries is restricted by the inherently slow kinetics of oxygen reduction
reaction (ORR) and oxygen evolution reaction (OER). Therefore, the development of bifunctional oxygen catalyst is
essential to overcome the kinetic limitations of ORR and OER. Among various metal oxide-based catalysts, perovskite
oxides have received substantial interest because of their remarkable catalytic activity and structural stability in alkaline
media. In the present work, we report a monoclinic double perovskite oxide (Pr2MnCoO6) as a highly active bifunctional
electrocatalyst. The structural differences between Pr2MnCoO6 and the counterpart La2MnCoO6 were investigated using
X-ray diffraction (XRD) and ex situ X-ray absorption spectroscopy (XAS). Interestingly, Pr2MnCoO6 showed increased
local structural distortion and enhanced rock-salt ordering of the MnO6 and CoO6 octahedra compared with La2MnCoO6,
which are suggested to influence electrocatalytic activities. Accordingly, Pr2MnCoO6 exhibited remarkable catalytic activities
during ORR and OER, reducing reliance on noble-metal catalysts for oxygen electrocatalysis.
