Diamondoid Ni(II) Coordination Polymer as an Electrocatalyst   for Hydrogen and Oxygen Evolution Reactions and Overall Water Splitting

Chem Asian J. 2024 Apr 18:e202400218. doi: 10.1002/asia.202400218. Online ahead of print.ABSTRACTWe 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.PMID:38634303 | DOI:10.1002/asia.202400218

Source: Chemistry, an Asian Journal - April 18, 2024 Category: Chemistry Authors: Sanobar Naaz Taposi Chatterjee Saswati Roy Basudeb Dutta Saikh M Wabaidur Masoom Raza Siddiqui Malik Wahid Seikh Mafiz Alam Mohammad Hedayetullah Mir Source Type: research