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Metamorphosis of Heterostructured Surface‐Mounted Metal–Organic Frameworks Yielding Record Oxygen Evolution Mass Activities
Author(s) -
Hou Shujin,
Li Weijin,
Watzele Sebastian,
Kluge Regina M.,
Xue Song,
Yin Shanshan,
Jiang Xinyu,
Döblinger Markus,
Welle Alexander,
Garlyyev Batyr,
Koch Max,
MüllerBuschbaum Peter,
Wöll Christof,
Bandarenka Aliaksandr S.,
Fischer Roland A.
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202103218
Subject(s) - overpotential , electrocatalyst , oxygen evolution , materials science , electrochemistry , chemical engineering , metal organic framework , electrolyte , aqueous solution , hydroxide , microstructure , inorganic chemistry , nanotechnology , electrode , metallurgy , organic chemistry , chemistry , adsorption , engineering
Materials derived from surface‐mounted metal–organic frameworks (SURMOFs) are promising electrocatalysts for the oxygen evolution reaction (OER). A series of mixed‐metal, heterostructured SURMOFs is fabricated by the facile layer‐by‐layer deposition method. The obtained materials reveal record‐high electrocatalyst mass activities of ≈2.90 kA g −1 at an overpotential of 300 mV in 0.1 m KOH, superior to the benchmarking precious and nonprecious metal electrocatalysts. This property is assigned to the particular in situ self‐reconstruction and self‐activation of the SURMOFs during the immersion and the electrochemical treatment in alkaline aqueous electrolytes, which allows for the generation of NiFe (oxy)hydroxide electrocatalyst materials of specific morphology and microstructure.