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A Highly‐Efficient Oxygen Evolution Electrocatalyst Derived from a Metal‐Organic Framework and Ketjenblack Carbon Material
Author(s) -
Öztürk Seçil,
Moon Gunhee,
Spieß Alex,
Budiyanto Eko,
Roitsch Stefan,
Tüysüz Harun,
Janiak Christoph
Publication year - 2021
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.202100278
Subject(s) - overpotential , oxygen evolution , electrocatalyst , materials science , electrochemistry , metal organic framework , chemical engineering , carbon fibers , anode , composite number , nanotechnology , inorganic chemistry , electrode , chemistry , composite material , organic chemistry , adsorption , engineering
The composite of the metal‐organic framework (MOF) Ni(Fe)‐MOF‐74 and the highly conductive carbon material ketjenblack (KB) could be easily obtained from the in‐situ MOF synthesis in a one‐step solvothermal reaction. The composite material features a remarkable electrochemical oxygen evolution reaction (OER) performance where the overpotential at 10 mA/cm 2 and the current density at 1.7 V RHE are recorded as 0.274 V RHE and 650 mA/cm 2 , respectively, in 1 mol/L KOH. In particular, the activation of nickel‐iron clusters from the MOF under an applied anodic bias steadily boosts the OER performance. Although Ni(Fe)‐MOF‐74 goes through some structural modification during the electrochemical measurements, the stabilized and optimized composite material shows excellent OER performance. This simple strategy to design highly‐efficient electrocatalysts, utilizing readily available precursors and carbon materials, will leverage the use of diverse metal‐organic complexes into electrode fabrication with a high energy conversion efficiency.