Document Type : Original Article

Authors

• Shokufeh Seifi Elmi ¹
• Leila Mohammadi ¹
• Maryam Malmir ¹
• Shokufeh Varshoy ²

¹ Department of Physics, Lorestan University, Khorramabad 68151-44316, Iran

² University of Technology Sydney

Abstract

The electrochemical hydrogen discharge capacity of cobalt (iron)/multiwalled carbon nanotubes (MWCNTs) has been investigated and discussed in this study. Iron (cobalt) was electrochemically deposited on copper foam, and MWCNTs were added to the electrode via a dropwise method to create nanoelectrodes that serve as active anode materials for reversible hydrogen ion storage. The MWCNTs had previously been washed with acid to create active sites for hydrogen adsorption. After characterization, the discharge capacity of the nanoelectrodes was examined, revealing that the cobalt/MWCNT nanoelectrode exhibited a greater discharge capacity of 1320 mAh/gr compared to the iron/MWCNT nanoelectrode, which had a discharge capacity of 1210 mAh/gr at a constant current of 1 mA. Due to cobalt's lower electrical resistivity and greater stability compared to iron, cobalt-based nanoelectrodes demonstrate superior reduction activity and discharge capacity over their iron-based counterparts. Therefore, these nanoelectrodes are promising materials for hydrogen storage applications.

Keywords

• Electrochemical hydrogen storage capacity
• MWCNT
• Cobalt nanoelectrode
• Iron nanoelectrode

Main Subjects

• Nanomaterials