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Frontispiece: A Dynamically Stabilized Single‐Nickel Electrocatalyst for Selective Reduction of Oxygen to Hydrogen Peroxide
Author(s) -
Wang Tingting,
Zeng Zhongming,
Cao Lingyun,
Li Zhe,
Hu Xuefu,
An Bing,
Wang Cheng,
Lin Wenbin
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201886464
Subject(s) - catalysis , electrocatalyst , hydrogen peroxide , nickel , faraday efficiency , chemistry , selectivity , metal , oxygen , photochemistry , hydrogen , peroxide , inorganic chemistry , electrochemistry , organic chemistry , electrode
A single [Ni II (H 2 O) 6 ] 2+ cation is dynamically associated with a negaitvely charged metal‐organic layer (MOL) via hydrogen bonding and coulombic interactions to serve as a catalyst for selective reduction of O 2 to H 2 O 2 . The two‐electron reduction of oxygen on the Ni center generates neutral [Ni II (H 2 O) 4 (OH)(OOH)] 0 species, which momentarily disconnects from the negatively charged MOL and thus avoids the over‐reduction of O 2 to water. Release of H 2 O 2 from [Ni II (H 2 O) 4 (OH)(OOH)] 0 regenerates [Ni II (H 2 O) 6 ] 2+ which regains affinity to the MOL. Such a dynamically associated single‐metal center represents a new strategy for controlling selectivity in catalysis. For more information, see the Full Paper by C. Wang et al. on page 17011 ff.