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Hemi-core@Frame AuCu@IrNi Nanocrystals as Active and Durable Bifunctional Catalysts for the Water Splitting Reaction in Acidic Media

Abstract

Highly efficient and economically sustainable hydrogen production via electrocatlytic water splitting can be realized by the advent of active and durable electrocatalysts toward oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Multimetallic nanoframe structures have received a great attention as promising electrocatalysts for these reactions, because the inherent high surface area and tunable surface energy states are beneficial to the electrocatalyst performance. We envisaged that the stability and activity of multimetallic nanoframe catalysts can be simultaneously augmented by introducing an additional structural feature of activity-enhancing lattice mismatch via formation of a structure-fortifying core-shell structure. Herein, we successfully demonstrate that hemi-core@frame AuCu@IrNi nanocrystals, possessing both structural features of nanoframe and core-shell, are active and durable bifunctional catalysts toward both OER and HER under acidic conditions. The hemicore@frame AuCu@IrNi nanocrystals exhibits superior efficient electrocatalytic performance toward overall water splitting reaction, which shows 355 mV overpotential at the current density of 10 mA cm-2 in 0.5 M H2SO4 electrolyte. The robustness of catalysts was also verified through the long-term stability test.

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Publication details

The article was received on 29 Dec 2018, accepted on 12 Feb 2019 and first published on 12 Feb 2019


Article type: Communication
DOI: 10.1039/C8NH00520F
Citation: Nanoscale Horiz., 2019, Accepted Manuscript

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    Hemi-core@Frame AuCu@IrNi Nanocrystals as Active and Durable Bifunctional Catalysts for the Water Splitting Reaction in Acidic Media

    J. Park, S. Choi, A. Oh, H. Jin, J. Joo, H. Baik and K. Lee, Nanoscale Horiz., 2019, Accepted Manuscript , DOI: 10.1039/C8NH00520F

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