Controlled Electrodeposited of Cobalt Oxide Nanoparticles on Graphenized Pencil Lead Electrode as Efficient Electrocatalyst for Oxygen Evolution Reaction in Alkaline Medium
عنوان مقاله: Controlled Electrodeposited of Cobalt Oxide Nanoparticles on Graphenized Pencil Lead Electrode as Efficient Electrocatalyst for Oxygen Evolution Reaction in Alkaline Medium
شناسه ملی مقاله: JR_CIC-2-1_005
منتشر شده در در سال 1402
شناسه ملی مقاله: JR_CIC-2-1_005
منتشر شده در در سال 1402
مشخصات نویسندگان مقاله:
Rahim Mohammad-Rezaei - Department of Chemistry, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
Sahand Soroodian - Department of Chemistry, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
خلاصه مقاله:
Rahim Mohammad-Rezaei - Department of Chemistry, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
Sahand Soroodian - Department of Chemistry, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
In this study cobalt oxide nanoparticles were electrodeposited on the surface of graphenized pencil lead electrode (GPLE) as a low cost and efficient electrocatalyst for the OER in alkaline media. The prepared cobalt oxide modified GPLE (CoOx/GPLE) was carefully characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, electrochemical impedance spectroscopy and cyclic voltammetry techniques. The developed electrocatalyst represents remarkably low OER overpotential of ۱.۴۱V (vs. RHE) at the current density of ۱۰ mA cm-۲ and Tafel slope of ۱۴۹ mV dec-۱ in ۰.۱ M KOH solution. The CoOx/GPLE was highly stable and capable for maintaining catalytic activity for at least ۵ h. Due to distinctive electrical conductivity, high mass transfer, and adequate active sites of GPLE, the electrocatalytic activity of the cobalt oxide nanoparticles were incredibly improved in CoOx/GPLE.
کلمات کلیدی: Oxygen evolution reaction, Graphene, Cobalt oxide nanoparticles, Electrocatalyst, Pencil lead electrode
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1681246/