Cao, Tingting, Li, Yang, Xie, Tinghui, Wang, Xinfang, Huang, Zuogang, and Yu, Huaguang
Four Ni, Co, Cu, Zn-containing coordination polymers incorporating 4,4′,4′′,4′′′-tetrakiscarboxyphenylsilane (H4tcps) and 1,3,5-tris(2-methyl-1H-imidazol-1-yl)benzene (tmib) ligands, namely [Ni6(tcps)3(tmib)4(H2O)2] (1), [Co6(tcps)3(tmib)4] (2), [Cu2(tcps)(tmib)(H2O)] (3) and [Zn2(tcps)(tmib)] (4), were synthesized by the solvothermal method. Compounds 1 and 2 were isostructural with three-dimensional (3D) (3,4)-connected frameworks. Compounds 3 and 4 possessed (3,4)-connected 3D networks with (6·82)(6·85)(62·82·102)(62·8) and (4·6·8)(4·63·82)(66)(67·83) topology, respectively. The thermal derivatives of compounds 1 and 2, Co-800 and Ni-700, exhibited low OER overpotentials of 338 and 388 mV to achieve a current density of 10 mA cm−2 and hold their electrocatalytic activity for at least 9 hours in 1 M KOH. [ABSTRACT FROM AUTHOR]