Fabrication of Mn3O4-CeO2-rGO as Nanocatalyst for Electro-Oxidation of Methanol

Abstract

Recently, the use of metal oxides as inexpensive and efficient catalysts has been considered by researchers. In this work, we introduce a new nanocatalyst including a mixed metal oxide, consisting of manganese oxide, cerium oxide, and reduced graphene oxide (Mn3O4-CeO2-rGO) by the hydrothermal method. The synthesized nanocatalyst was evaluated for the methanol oxidation reaction. The synergetic effect of metal oxides on the surface of rGO was investigated. Mn3O4-CeO2-rGO showed an oxidation current density of 17.7 mA/cm2 in overpotential of 0.51 V and 91% stability after 500 consecutive rounds of cyclic voltammetry. According to these results, the synthesized nanocatalyst can be an attractive and efficient option in the methanol oxidation reaction process.

Quantum Revivals in Curved Graphene Nanoflakes

“…The outstanding properties of this 2D material have led to many application proposals. To cite just a few of them: nanocomposites for bone tissue engineering [3], composites for multifunctional applications [4], lubrication [5,6], solar cells [7], ultracapacitors [8,9], batteries [10], sensors [11], catalysis [12], nanomedicine [13], fuel cells [14,15] or even energy harvesting [16].…”

Multifunctional Nanomaterials for Energy Applications

“…Askari et al [20] reported the one-step preparation by the hydrothermal method of Mn 3 O 4 -CeO 2 mixed metal oxides and reduced graphene oxide (rGO) hybrid catalysts to be used in the methanol oxidation reaction (MOR) process. Interestingly, the authors remarked the occurrence of a synergetic effect occurring between rGO and Mn 3 O 4 -CeO 2 .…”

NiO–Co3O4–rGO as a Multicomponent Transition Metal Oxide Nanocatalyst for Ultra‐level Detection of Nitrite in Beef and Tap Water Samples

“…[ 31 ] Moreover, due to high surface area, rGO can be an attractive choice for promoting the electrocatalytic effects of metal oxide composites. [ 32,33 ]…”

“…[31] Moreover, due to high surface area, rGO can be an attractive choice for promoting the electrocatalytic effects of metal oxide composites. [32,33] In this study, NiO-Co 3 O 4 (NC) and NiO-Co 3 O 4 -rGO (NCR), as two metal component nanocatalysts, were synthesized by a hydrothermal method and the structure of the nanomaterials was characterized by complementary techniques. The synergistic effect of NiO and Co 3 O 4 together and the hybridization of these efficient metal oxides with rGO led to the fabrication of a cheap, stable and sensitive electrochemical sensor for nitrite detection in beef and tap water as real samples.…”