Frontispiece: A Dynamically Stabilized Single‐Nickel Electrocatalyst for Selective Reduction of Oxygen to Hydrogen Peroxide. Issue 64 (20th November 2018)

• Record Type: Journal Article
• Authors: Wang, Tingting; Zeng, Zhongming; Cao, Lingyun; Li, Zhe; Hu, Xuefu; An, Bing; Wang, Cheng; Lin, Wenbin
• Is Part Of: Chemistry. Volume 24:Issue 64(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-11-20
• Subjects: electrochemistry -- metal–organic frameworks -- nickel -- oxygen -- reduction; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201886464
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract : A single [Ni II (H2 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 O2 to H2 O2 . The two‐electron reduction of oxygen on the Ni center generates neutral [Ni II (H2 O)4 (OH)(OOH)] 0 species, which momentarily disconnects from the negatively charged MOL and thus avoids the over‐reduction of O2 to water. Release of H2 O2 from [Ni II (H2 O)4 (OH)(OOH)] 0 regenerates [Ni II (H2 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. onpage 17011 ff.