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Advanced Bifunctional Oxygen Reduction and Evolution Electrocatalyst Derived from Surface-Mounted Metal-Organic Frameworks [in press]

Fischer, Roland A.; Li, Weijin; Xue, Song; Watzele, Sebastian; Hou, Shujin; Fichtner, Johannes; Semrau, Anna Lisa; Zhou, Liujiang; Welle, Alexander

Abstract:
Metal‐organic frameworks (MOFs) and their derivatives are considered as promising catalysts for the oxygen reduction (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 just ~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 : 0.69 V in 0.1 M KOH with a mass loading being two orders of magnitude lower than that of benchmark electrocatalysts.

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Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1433-7851
KITopen-ID: 1000104855
HGF-Programm 43.22.01 (POF III, LK 01)
Functionality by Design
Erschienen in Angewandte Chemie / International edition
Vorab online veröffentlicht am 08.01.2020
Schlagwörter 2019-022-026229 ToF-SIMS
Nachgewiesen in Web of Science
Scopus
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