Ferrocene‐Based Metal–Organic Framework Nanosheets as a Robust Oxygen Evolution Catalyst. Issue 23 (29th April 2021)

• Record Type: Journal Article
• Authors: Liang, Jing; Gao, Xutao; Guo, Biao; Ding, Yu; Yan, Jiawei; Guo, Zhengxiao; Tse, Edmund C. M.; Liu, Jinxuan
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 23(2021)
• Page Start: 12770
• Page End: 12774
• Publication Date: 2021-04-29
• Subjects: electrocatalysts -- ferrocene -- metal–organic frameworks -- oxygen evolution reaction; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202101878
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: We report the synthesis of two‐dimensional metal–organic frameworks (MOFs) on nickel foam (NF) by assembling nickel chloride hexahydrate and 1, 1′‐ferrocenedicarboxylic acid (NiFc‐MOF/NF). The NiFc‐MOF/NF exhibits superior oxygen evolution reaction (OER) performance with an overpotential of 195 mV and 241 mV at 10 and 100 mA cm −2, respectively under alkaline conditions. Electrochemical results demonstrate that the superb OER performance originates from the ferrocene units that serve as efficient electron transfer intermediates. Density functional theory calculations reveal that the ferrocene units within the MOF crystalline structure enhance the overall electron transfer capacity, thereby leading to a theoretical overpotential of 0.52 eV, which is lower than that (0.81 eV) of the state‐of‐the‐art NiFe double hydroxides. Abstract : 2D MOFs on nickel foam (NF) were assembled. NiFc‐MOF/NF exhibits superior OER performance (overpotential of 195 mV at 10 and 241 mV at 100 mA cm −2 ) under alkaline conditions. The ferrocene units within the MOF crystalline structure enhance the overall electron transfer capacity, thereby leading to a theoretical overpotential of 0.52 eV (lower than NiFe double hydroxides: 0.81 eV).