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Advanced Bifunctional Oxygen Reduction and Evolution Electrocatalyst Derived from Surface‐Mounted Metal–Organic Frameworks
Author(s) -
Li Weijin,
Xue Song,
Watzele Sebastian,
Hou Shujin,
Fichtner Johannes,
Semrau A. Lisa,
Zhou Liujiang,
Welle Alexander,
Bandarenka Aliaksandr S.,
Fischer Roland A.
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201916507
Subject(s) - overpotential , electrocatalyst , oxygen evolution , bifunctional , materials science , catalysis , chemical engineering , bifunctional catalyst , current density , metal organic framework , nanotechnology , electrochemistry , chemistry , inorganic chemistry , electrode , organic chemistry , physics , quantum mechanics , adsorption , engineering
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” Δ E 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.