Diao Yingxue, Hu Jieying, Cheng Shengxian, Ma Feixiang, Li Mu-Qing, Hu Xiangzi, Li Yang Yang, He Jun, Xu Zhengtao
School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, Guangdong, P. R. China.
Inorg Chem. 2020 Apr 20;59(8):5626-5631. doi: 10.1021/acs.inorgchem.0c00328. Epub 2020 Apr 1.
Finely dispersed Co(0) and CoO species were efficiently loaded into a stable metal-organic framework to impart catalytic activities to the porous solid. The metalation of the MOF host is facilitated by the dense arrays of accessible alkyne units that boost the alkyne-Co(CO) interaction. The tetrakis(4-carboxylphenylethynyl)pyrene linker, with eight symmetrically backfolded alkyne side arms, features strong fluorescence and a dendritic Sierpinski shape. The resultant Zr(IV)-MOF features NU-901 topology ( net, with rhombus channels) and breathing properties (e.g., the contracted (porous) phase reverts to the as-made phase upon contact with DMF (dimethylformamide)). The inserted Co(CO) guests quickly react with air to form atomically dispersed CoO species (nondiffracting), and subsequent thermal treatment at 600 °C of the CoO-loaded solid generates an electrocatalyst for the oxygen evolution reaction (OER).
将细小分散的Co(0)和CoO物种有效地负载到稳定的金属有机框架中，赋予多孔固体催化活性。MOF主体的金属化通过密集排列的可及炔烃单元得以促进，这些单元增强了炔烃-Co(CO)相互作用。具有八个对称向后折叠炔烃侧臂的四(4-羧基苯基乙炔基)芘连接体具有强荧光和树枝状的谢尔宾斯基形状。所得的Zr(IV)-MOF具有NU-901拓扑结构（具有菱形通道的网络）和呼吸特性（例如，收缩（多孔）相在与二甲基甲酰胺（DMF）接触时恢复到初始状态）。插入的Co(CO)客体迅速与空气反应形成原子分散的CoO物种（无衍射），随后对负载CoO的固体在600°C下进行热处理，生成用于析氧反应（OER）的电催化剂。
