Engineering Co3O4/MnO2 nanocomposite materials for oxygen reduction electrocatalysis

Abstract

Co 3 O 4 /MnO 2 nanocomposites have been effectively synthesized via a coprecipitation route. The addition of Co 3 O 4 in MnO 2 led to a drastic change in the electrochemical properties. The electrochemical behaviors of Co 3 O 4 /MnO 2 nanocomposites have been investigated. The Co 3 O 4 /MnO 2 nanocomposite electrode exhibits high stabilities and high catalytic activities.

Decorating MnO2 nanosheets on MOF-derived Co3O4 as a battery-type electrode for hybrid supercapacitors

“…However, the prominent peaks at 592 cm −1 and 520 cm −1 are attributed to the stretching vibrations of M–O or M–O–M (M = Co, Mn). 42…”

3D Assembly of CoAl2O4 Spinel Nanosheets for Energy Storage

“…Notable research has been carried out on TMOs because of their low-cost, high theoretical specific capacitance value, excellent energy density, and redox ability, but their poor ion diffusion and electron transfer properties in their bulk state have been the reason behind low capacitive performance . For the last several years, TMOs, for example, Co 3 O 4 , MnO 2 , Fe 3 O 4 , NiCo 2 O 4 , and NiO, along with conductive supports are used as supercapacitor electrodes materials . Among TMOs, cobalt-based spinels are widely used in applications like catalysis, magnetism, electricity, and energy storage devices .…”

Experimental correlation of Mn3+cation defects and electrocatalytic activity of α-MnO2– an X-ray photoelectron spectroscopy study

“…[3][4][5] This has led to extensive efforts towards the development of nonprecious metal catalyst materials to attain the properties of Pt/ C. Recent years have witnessed signicant improvements and have brought forth potentially suitable candidates with superior ORR electrocatalytic activities. 1,3,[6][7][8][9][10][11] Among them, simple transition metal oxides such as manganese (Mn) oxides have drawn signicant attention as considerable alternatives to Pt/C. 12,13 Besides, the electrocatalytic activity of Mn oxides is mostly affected by the stoichiometry, chemical composition and morphology.…”