Zhang Rui-Zhe, Lu Le-Le, Chen Zhong-Hang, Zhang Xiaoping, Wu Bo-Yuan, Shi Wei, Cheng Peng
Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
Department of Chemistry, Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
Chemistry. 2022 May 16;28(28):e202200401. doi: 10.1002/chem.202200401. Epub 2022 Apr 5.
A cage-based metal-organic framework (Ni-NKU-101) with biphenyl-3,3',5,5'-tetracarboxylic acid was synthesized via solvothermal method. Ni-NKU-101 contains two types of cages based on trinuclear and octa-nuclear nickel-clusters that are connected with each other by the 4-connected ligands, to form a 3D framework with a new topology. A mixed-metal strategy was used to synthesize isostructural bimetallic MOFs of M Ni -NKU-101 (M=Mn, Co, Cu, Zn). The electrocatalytic studies showed that the hydrogen evolution reaction (HER) activity of Cu Ni -NKU-101 is much higher than that of other M Ni -NKU-101 catalysts in acidic aqueous solution, owing to the synergistic effect of the bimetallic centers. The optimized Cu Ni -NKU-101 has an overpotential of 324 mV at 10 mA cm and a Tafel slope of 131 mV dec . The mechanism of HER activity over these bimetallic MOF-based electrocatalysts are discussed in detail.
通过溶剂热法合成了一种含有联苯-3,3',5,5'-四羧酸的笼状金属有机框架材料（Ni-NKU-101）。Ni-NKU-101包含基于三核和八核镍簇的两种类型的笼，它们通过4连接配体相互连接，形成具有新拓扑结构的三维框架。采用混合金属策略合成了M Ni-NKU-101（M = Mn、Co、Cu、Zn）的同构双金属金属有机框架材料。电催化研究表明，由于双金属中心的协同效应，Cu Ni-NKU-101在酸性水溶液中的析氢反应（HER）活性远高于其他M Ni-NKU-101催化剂。优化后的Cu Ni-NKU-101在10 mA cm时的过电位为324 mV，塔菲尔斜率为131 mV dec。详细讨论了这些基于双金属金属有机框架材料的电催化剂上HER活性的机理。
