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Crystal Facet and Electronic Structure Modulation of Perovskite Oxides for Water Oxidation by Ungsoo Kim; Sangjin Lee; Donghwan Koo; Yunseong Choi; Hyungmin Kim; Eunbin Son; Jeong Min Baik; Young-Kyu Han; Hyesung Park is a Engineering article available to read on EtoBox.

What is Crystal Facet and Electronic Structure Modulation of Perovskite Oxides for Water Oxidation about?

In water-splitting catalysts, exposing high-activity crystal facets with optimal electronic structures can significantly enhance the oxygen evolution reaction (OER) kinetics. In this work, we demonstrate a facile strategy for simultaneously modulating the preferential crystal facet and electronic structure of perovskite oxides for their use as water-electrolysis catalysts using a template-mediated growth approach. Experimental and computational analyses revealed that the preferred crystal facet of La 0.5 Sr 0.5 CoO 3 (LSC) grown on MoReS 2 was effectively modulated to the (110) plane, and the free energy barrier of the rate-determining step was lowered by such crystal facet engineering. Furthermore, the interfacial charge transfer between LSC and MoReS 2 enabled the optimal electronic structure of the B-site cation in LSC. Consequently, LSC grown on MoReS 2 exhibited an OER activity of 210 mV at 10 mA cm -2 , surpassing the performance of state-of-the-art perovskite oxidebased catalysts. Our findings provide new insights into the design of efficient perovskite oxide-based electrocatalysts for water electrolysis.

Who reads Crystal Facet and Electronic Structure Modulation of Perovskite Oxides for Water Oxidation?

Author

Ungsoo Kim; Sangjin Lee; Donghwan Koo; Yunseong Choi; Hyungmin Kim; Eunbin Son; Jeong Min Baik; Young-Kyu Han; Hyesung Park

Publisher

American Chemical Society (ACS)

Published

2023

Language

EN

Field

Engineering (Physical Sciences)