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

Research output: Contribution to journalArticlepeer-review

114 Scopus citations

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” ΔEORR-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.

Original languageEnglish
Pages (from-to)5837-5843
Number of pages7
JournalAngewandte Chemie International Edition in English
Volume59
Issue number14
DOIs
StatePublished - 27 Mar 2020

Keywords

  • Metal–organic frameworks
  • derivatives
  • oxygen evolution reaction
  • oxygen reduction reaction
  • thin films

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