We have successfully synthesized a new Ni(II)-based coordination polymer (CP) [Ni2(cis-1,4-chdc)2(4,4′-bpy)3(H2O)2] (1); (cis-1,4- H2chdc = cis-1,4-cyclohexanedicarboxylic acid and 4,4'-bpy = 4,4'-bipyridine) employing slow diffusion method in a single pot technique. The connectivity of Ni(II) ions and bridging cis-1,4-chdc ligand gives rise to a three-dimensional (3D) framework with 2-fold interpenetrated diamondoid topology. Interestingly, the synthesized CP acts as efficient catalyst for electrocatalytic water splitting. The water oxidation activity of compound 1 exhibits Tafel slope equivalent to 361.48 mV.dec−1 for hydrogen evolution reaction (HER) and 353.53 mV.dec−1 for oxygen evolution reaction (OER) in an alkaline medium while almost similar values of Tafel slope for HER and OER equivalent to 287.33 mV.dec−1 and 289.93 mV.dec-1 respectively in acidic medium. Thus, the compound 1 has excellent efficacy in catalyzing HER and OER in acidic as well as alkaline medium, which is ascribed to its distinctive 3D architecture.

中文翻译：

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金刚石 Ni(II) 配位聚合物作为氢和氧析出反应以及整体水分解的电催化剂

我们成功合成了一种新型Ni(II)基配位聚合物(CP)[Ni2(cis-1,4-chdc)2(4,4′-bpy)3(H2O)2](1)； （cis-1,4-H2chdc = cis-1,4-环己烷二甲酸和4,4'-bpy = 4,4'-联吡啶）在单锅技术中采用缓慢扩散法。 Ni(II) 离子和桥接 cis-1,4-chdc 配体的连接产生了具有 2 重互穿金刚形拓扑结构的三维 (3D) 框架。有趣的是，合成的 CP 作为电催化水分解的有效催化剂。在碱性介质中，化合物 1 的水氧化活性表现出的塔菲尔斜率相当于析氢反应 (HER) 的 361.48 mV.dec−1 和析氧反应 (OER) 的 353.53 mV.dec−1，而塔菲尔斜率的值几乎相似对于 HER 和 OER，在酸性介质中分别相当于 287.33 mV.dec−1 和 289.93 mV.dec-1。因此，化合物1在酸性和碱性介质中催化HER和OER具有优异的功效，这归因于其独特的3D结构。