Liang Jing, Gao Xutao, Guo Biao, Ding Yu, Yan Jiawei, Guo Zhengxiao, Tse Edmund C M, Liu Jinxuan
State Key Laboratory of Fine Chemicals, Dalian University of Technology, 116024, Dalian, P. R. China.
Department of Chemistry, CAS-HKU Joint Laboratory on New Materials, University of Hong Kong, Hong Kong SAR, P. R. China.
Angew Chem Int Ed Engl. 2021 Jun 1;60(23):12770-12774. doi: 10.1002/anie.202101878. Epub 2021 Apr 29.
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 , 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.
我们报道了通过组装六水合氯化镍和1,1'-二茂铁二甲酸（NiFc-MOF/NF）在泡沫镍（NF）上合成二维金属有机框架（MOF）。在碱性条件下，NiFc-MOF/NF在10和100 mA cm时分别具有195 mV和241 mV的过电位，表现出优异的析氧反应（OER）性能。电化学结果表明，出色的OER性能源于作为高效电子转移中间体的二茂铁单元。密度泛函理论计算表明，MOF晶体结构中的二茂铁单元增强了整体电子转移能力，从而导致理论过电位为0.52 eV，低于最先进的镍铁双氢氧化物的过电位（0.81 eV）。
