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A Simple Approach towards High‐Performance Perovskite‐Based Bifunctional Oxygen Electrocatalysts
Author(s) -
Elumeeva Karina,
Masa Justus,
Tietz Frank,
Yang Fengkai,
Xia Wei,
Muhler Martin,
Schuhmann Wolfgang
Publication year - 2016
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500353
Subject(s) - bifunctional , electrocatalyst , cobaltite , oxygen evolution , materials science , electrolyte , perovskite (structure) , electrochemistry , chemical engineering , oxygen , inorganic chemistry , catalysis , chemistry , electrode , metallurgy , biochemistry , organic chemistry , engineering
To accelerate the large‐scale commercialization of electrochemical energy storage and conversion technologies through water splitting and regeneration in reversible fuel cells, cost‐effective, highly efficient, and durable reversible oxygen electrodes are required. We report a comparatively simple approach to modify a group of oxygen‐evolving perovskites based on lanthanum cobaltite into effective bifunctional systems through partial atom substitution, which, upon intermixing with nitrogen‐doped carbon nanotubes, achieve remarkably low round‐trip overvoltage of <850 mV in the electrocatalysis of oxygen reduction and oxygen evolution in an alkaline electrolyte, KOH (0.1 m ). Besides the bifunctional electrocatalytic performance, the composite systems with a low Fe content possessed promising long‐term stability.