Highly Stable Trimetallic (Co, Ni, and Fe) Zeolite Imidazolate Framework Microfibers: An Excellent Electrocatalyst for Water Oxidation
Selvasundarasekar Sam Sankar, Karthikeyan Manjula, G Keerthana, B. Ramesh Babu, Subrata Kundu
Abstract
One dimensional (1D) metal organic framework (MOF) micro/nanostructural arrays are highly promising candidates for their potential applications in energy related areas. These exceptional behaviors are mainly attributed to their combined properties. Herein, we have synthesized trimetallic zeolite imidazolate framework (ZIF) based fibrous material via a feasible wet chemical method followed by the reliable electrospinning (ES) method. The successful implantation of metals into the organic frameworks was ensured initially and then subjected as the electrocatalyst for the oxygen evolution reaction (OER) under alkaline medium. The newly developed material showed the lesser overpotential of 273 mV at 10 mA cm–2 current density. The observed Tafel slope value and charge transfer resistance (Rct) value were found to be lesser. In addition to that, the synthesized material possessed remarkable stability over 12 h. From the aforementioned values, there is a confirmation that the observed enhancement in the electrocatalytic activity was mainly associated with the morphology and the combined physicochemical properties.