Advanced Bifunctional Oxygen Reduction and Evolution Electrocatalyst Derived from Surface-Mounted Metal-Organic Frameworks

Weijin Li; Song Xue; Sebastian Watzele; Shujin Hou; Johannes Fichtner; A Lisa Semrau; Liujiang Zhou; Alexander Welle; Aliaksandr S Bandarenka; Roland A Fischer

doi:10.1002/anie.201916507

Advanced Bifunctional Oxygen Reduction and Evolution Electrocatalyst Derived from Surface-Mounted Metal-Organic Frameworks

Angew Chem Int Ed Engl. 2020 Mar 27;59(14):5837-5843. doi: 10.1002/anie.201916507. Epub 2020 Jan 29.

Authors

Weijin Li^{1

2}, Song Xue^{2

3}, Sebastian Watzele^{2

3}, Shujin Hou^{2

3}, Johannes Fichtner^{2

3}, A Lisa Semrau^{1

2}, Liujiang Zhou⁴, Alexander Welle⁵, Aliaksandr S Bandarenka^{2

3}, Roland A Fischer^{1

2}

Affiliations

¹ Department of Chemistry, Technical University of Munich, Lichtenbergstraße 4, 85748, Garching b. München, Germany.
² Catalysis Research Center, Technical University of Munich, Ernst-Otto-Fischer-Straße 1, 85748, Garching b. München, Germany.
³ Department of Physics, Technical University of Munich, James-Franck-Straße 1, 85748, Garching b. München, Germany.
⁴ Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
⁵ Institute of Functional Interfaces, and Karlsruhe Nano Micro Facility, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.

Abstract

Metal-organic frameworks (MOFs) and their derivatives are considered as promising catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), which are important for many energy provision technologies, such as electrolyzers, fuel cells and some types of advanced batteries. In this work, a "strain modulation" approach has been applied through the use of surface-mounted NiFe-MOFs in order to design an advanced bifunctional ORR/OER electrocatalyst. The material exhibits an excellent OER activity in alkaline media, reaching an industrially relevant current density of 200 mA cm^-2 at an overpotential of only ≈210 mV. It demonstrates operational long-term stability even at a high current density of 500 mA cm^-2 and exhibits the so far narrowest "overpotential window" ΔE_ORR-OER of 0.69 V in 0.1 m KOH with a mass loading being two orders of magnitude lower than that of benchmark electrocatalysts.

Keywords: Metal-organic frameworks; derivatives; oxygen evolution reaction; oxygen reduction reaction; thin films.

Abstract

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