Cobalt oxide nanocubes interleaved reduced graphene oxide as an efficient electrocatalyst for oxygen reduction reaction in alkaline medium. (20th May 2017)

• Record Type: Journal Article
• Authors: Shahid, Muhammad Mehmood; Rameshkumar, Perumal; Basirun, Wan Jeffrey; Juan, Joon Ching; Huang, Nay Ming
• Is Part Of: Electrochimica acta. Volume 237(2017)
• Page Start: 61
• Page End: 68
• Publication Date: 2017-05-20
• Subjects: Co3O4 nanocubes -- Reduced graphene oxide -- Nanohybrid -- Electrocatalysis -- Oxygen reduction reaction; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.03.088
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Cobalt oxide (Co3 O4 ) nanocubes were incorporated into reduced graphene oxide (RGO) using a simple single-step hydrothermal reaction for an electrocatalytic oxygen reduction reaction (ORR). The obtained nanohybrid structure of RGO@Co3 O4 was adequately characterized using field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Raman spectroscopy, UV-visible spectroscopy, and Fourier transform infrared (FT-IR) spectroscopy. The RGO@Co3 O4 nanohybrid with 4 wt% of graphene oxide modified glassy carbon (GC) electrode exhibited better electrocatalytic activity in terms of the current density, overpotential and stability, compared to the other controlled modified electrodes and commercial Pt/C catalyst for the ORR in an alkaline medium. The RGO@Co3 O4 nanohybrid showed good methanol tolerance for the ORR in the presence of 0.5 M methanol.