Can Novel Cobalt–Organic Framework Nanosheets Display an Electrocatalytic Activity Toward Methanol Electrooxidation on Pt and Au Electrodes?
Mohamed Abdelwahab, Gehad G. Mohamed, M.A. Zayed, Ayman S. Eliwa
Abstract
The increasing demand for eco-friendly fuel options, driven by a rising petition for cleaner energy and heightened awareness of environmental issues, has captured global attention. In the present work, platinum and gold electrodes were modified with a cobalt 2,2’-[1,4-phenylenebis(methanylylidene-azanylylidene)]dibenzoic acid metal-organic framework (Co-MOF). The catalytic effectiveness of the MOF was investigated. Surface morphology analysis was carried out using scanning electron microscopy, while X-ray diffraction and FT-IR spectroscopy were employed to characterize crystallinity and identify functional groups. Electrochemical studies included cyclic voltammetry, electrochemical impedance spectroscopy, Tafel plot analysis, and chronoamperometry. The platinum electrode, after modification, exhibited the highest current value (7.39 mA cm−2) in the presence of 0.5 M methanol in 1 M NaOH, with a Tafel slope of 138 mV dec−1. Similarly, the modified gold electrode demonstrated its highest current value (7.92 mA cm−2) at 2 M methanol in 1 M NaOH, with a Tafel slope of 190 mV dec−1.