Abstract
Dimethylamine borane (DMAB) is a promising fuel alternative for fuel cell applications. In this work cyclic voltammetric behavior of DMAB was investigated on the polymerized aminophenol film decorated with Ag nanoparticles in alkaline media. The polymer film was formed on the glassy carbon electrode by electrochemical technique and then, the surface was modified with Ag nanoparticles. The surface of the modified electrode was identified by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy techniques. The developed electrode has displayed high electrocatalytic activity for DMAB oxidation in alkaline media depending on the supporting electrolyte concentration. Experimental parameters such as cycle number used in electropolymerization of p-aminophenol, deposition of Ag nanoparticles and supporting electrolyte were optimized.
Highlights
Fossil-based energy resources give rise to environmental problems that led researchers to find alternative renewable energy sources
In the present work, Ag nanoparticles (AgNPs)/PAP/GCE catalyst has been prepared by electrochemical synthesis of AgNPs after electrochemical formation of poly aminophenol film on glassy carbon electrode surface
Cyclic voltammograms of Dimethylamine borane (DMAB) were indicated that higher electrocatalytic activity is obtained on the AgNPs/PAP/GCE as compared to the GCE and PAP/GCE in alkaline media
Summary
Fossil-based energy resources give rise to environmental problems that led researchers to find alternative renewable energy sources. Another study about direct electrooxidation of DMAB was conducted by Nagle and Rohan [13] It explained that an overall coulomb number of six has been determined from the data acquired using the diffusion coefficient determined and the number of electrons in the oxidation reaction depends on the OH–DMAB ratio and the hydrogen content becomes increasingly important as this ratio decreases. Conducting polymers have attracted significant attention because of their chemical, mechanical, optical, and electrical properties [37,38,39] Due to their unique properties, a variety of conducting polymers are used in analytical applications [40] as well as catalytic surfaces in fuel cells [41,42,43,44]. Experimental parameters both in electropolymerization and DMAB oxidation were optimized and the results of electrocatalytic oxidation of DMAB at the AgNPs-modified oxidized polymer film electrode were compared with those obtained with bare GCE and polymer film electrode
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