Conductive metal–Organic frameworks endow high-efficient oxygen evolution of La0·6Sr0·4Co0·8Fe0·2O3 perovskite oxide nanofibers

Abstract Searching for high-efficient and stable electrocatalyst with low-cost, earth-abundant, and eco-friendly materials are of great interest for the large-scale applications in electrochemical energy systems. Herein, a feasible strategy is developed for boosting the oxygen evolution reaction (OER) kinetics of La0·6Sr0·4Co0·8Fe0·2O3 (LSCF) perovskite oxide by encapsulation of conductive metal-organic frameworks (MOF) of Ni3(HITP)2 on the surface via electrospinning and its further implemented post-annealing treatment. The as-prepared La0·6Sr0·4Co0·8Fe0·2O3@Ni3(HITP)2 (LSCF@Ni3(HITP)2) nanofibers (NFs) exhibits enhanced OER performance and long-term stability towards OER, delivering a low overpotential of 272 mV at 10 mA cm−2 and small Tafel slope as low as 95 mV dec−1. It outperforms the pristine LSCF NFs (345 mV, 188 mV dec−1), bare Ni3(HITP)2 (378 mV, 197 mV dec−1), as well as the state-of-the-art RuO2 (314 mV, 129 mV dec−1). The advanced OER activity is mainly attributable to the synergistic effect of unique 1D (dimensional) NFs structure and the coupled conductive MOF, which endows intrinsic electrical conductivity, fast charge transfer kinetics and favorable mass transportion. Our approach represents a solid step toward exploration of perovskite oxide-based catalysts for high-efficient water oxidation.