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Highly efficient and robust noble-metal free bifunctional water electrolysis catalyst achieved via complementary charge transfer

Engineering and Technology

Highly efficient and robust noble-metal free bifunctional water electrolysis catalyst achieved via complementary charge transfer

N. K. Oh, J. Seo, et al.

Discover an innovative bifunctional water electrolysis catalyst combining perovskite oxides and potassium ion-bonded MoSe₂ that outperforms traditional catalysts. This breakthrough, led by researchers Nam Khen Oh and colleagues, achieves impressive stability and efficiency in hydrogen and oxygen evolution reactions, withstanding over 2,500 hours of demanding conditions.

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Abstract
This study introduces a highly efficient and robust bifunctional water electrolysis catalyst composed of perovskite oxides (La0.5Sr0.5CoO3-δ, LSC) and potassium ion-bonded MoSe₂ (K-MoSe₂). The multidirectional charge transfer within the heterostructure enhances the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) kinetics, surpassing the performance of the Pt/C||IrO₂ couple. The catalyst exhibits remarkable stability over 2,500 h under a high current density of 100 mA cm⁻².
Publisher
Nature Communications
Published On
Jul 29, 2021
Authors
Nam Khen Oh, Jihyung Seo, Sangjin Lee, Hyung-Jin Kim, Ungsoo Kim, Junghyun Lee, Young-Kyu Han, Hyesung Park
Tags
bifunctional catalyst
water electrolysis
MoSe₂
perovskite oxides
hydrogen evolution
oxygen evolution
energy efficiency

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