One‐Dimensional Copper(II) Coordination Polymer as an Electrocatalyst for Water Oxidation

Abstract

Although cobalt‐based heterogeneous catalysts are the central focus in water oxidation research, interest in copper‐based water oxidation catalysts has been growing thanks the great abundance of copper and its biological relevance. Several copper oxides have recently been reported to be active catalysts for water oxidation. In this study, a heterogeneous copper‐based water oxidation catalyst that is not an oxide has been reported for the first time. Single‐crystal XRD studies indicate that the compound is a one‐dimensional coordination compound incorporating copper paddle‐wheel units connected through phosphine dioxide ligands. The catalyst exhibits an onset potential of 372 mV at pH 10.2, whereas an overpotential of only 563 mV is required to produce a current density of 1 mA cm−2. In addition to cyclic voltammetric and chronoamperometric studies, an investigation into the effect of pH on the catalytic activity and the robustness of the catalyst using long‐term bulk electrolysis (12 h) is presented.

Bioinspired Copper Coordination Polymer Catalysts for Oxygen Reduction Reaction

“…A 1D coordination polymer incorporating copper paddle–wheel units has recently been investigated as an active electrocatalyst for water oxidation . The previous study shows that copper sites in the paddle–wheel unit can activate water to form O 2 .…”

“…Copper acetate was reacted with phosphine ligands in methanol/dichloromethane mixture in peroxide media, which results in the formation of dark blue crystals of [Cu–A] and [Cu–B]. The structure of [Cu–A] was already described in our previously reported work . The crystal structure of the new copper catalyst, [Cu–B] was successfully solved in the monoclinic space group, P121/ n 1.…”

High Efficiency FeNi‐Metal‐Organic Framework Grown In‐situ on Nickel Foam for Electrocatalytic Oxygen Evolution

“…Hydrogen that is produced by water separation is divided into two half reactions, namely, an anodic oxygen‐evolution reaction (OER) and a cathodic hydrogen‐evolution reaction (HER) . OER involves a slow dynamic four electron transfer process, which requires a lot of overpotential ( η ) and significant energy loss hindered practical application, and larger energy barriers must be overcome in this approach ,. Therefore, an increase in OER activity is an important step in hydrogen production from electrolyzed water .…”

Sodalite‐type Cu‐based Three‐dimensional Metal–Organic Framework for Efficient Oxygen Reduction Reaction

“…and Kharwar et al. used one‐dimensional copper‐based coordination polymers for effective ORR catalysts …”

“…Recently Mishra et al and Kharwar et al used one-dimensional copper-basedc oordination polymers for effective ORR catalysts. [25][26][27][28] In the search of better sustainable green ORR catalystf or the fuelc ell to replace the platinum catalyst, we have synthesized ac atalyst, which mimics the enzyme oxygen activation. Here we have reported at hree-dimensional Cu-based MOF ([(Cu 4 Cl) 3 (H 0.5 BTT) 8 (H 2 O) 12 ]·3MeOH·9DMF) with tetrazole ligand (H 3 BTT = 5,5'-(1,4-phenylene) bis(1H-tetrazole)).…”