Electrocatalytic Activity of Nanohybrids Based on Carbon Nanomaterials and MFe₂O₄ (M=Co, Mn) towards the Reduction of Hydrogen Peroxide

Abstract

We report the advantages of hybrid nanomaterials prepared with electrogenerated ferrites (MFe2O4; M: Co, Mn) and multi‐walled carbon nanotubes (MWCNTs) or thermally reduced graphene oxide (TRGO) on the electro‐reduction of hydrogen peroxide. Glassy carbon electrodes (GCE) modified with these hybrid nanomaterials dispersed in Nafion/isopropanol demonstrated a clear synergism on the catalytic reduction of reduction of hydrogen peroxide at pH 13.00. The intimate interaction between MFe2O4 and carbon nanomaterials allowed a better electronic transfer and a facilitated regeneration of M2+ at the carbon nanomaterials, reducing the charge transfer resistances for hydrogen peroxide reduction and increasing the sensitivities of the amperometric response.

Highly Sensitive Enzyme‐free Sensor Based on a Carbon Paste Electrode Modified with Binary Zinc Oxide/Polyaniline Nanocomposites for Dopamine, Ascorbic Acid and Uric Acid Sensing

“…Metal nanoparticles and metal oxides are widely utilized thanks to their high electrocatalytic activity. Some works examining the iron nanoparticles [29], magnetite nanoparticles [30][31][32] and hybrid ferrite oxides nanoparticles [33] provided good results about the detection of some biomolecules such as peroxide, glucose and cholesterol. For instance, Swamy et al studied the electrochemical detection of dopamine and tyrosine using cooper oxide and nickel oxide [34].…”

Facile Synthesis of Low-Cost Copper-Silver and Cobalt-Silver Alloy Nanoparticles on Reduced Graphene Oxide as Efficient Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media

“…However, the downsides of the first and the last are their low chemical, physical, or thermal stability, and the noble metals’ high price and the catalysis of H 2 O 2 decomposition decrease their applicability [ 22 ]. The need for low-cost, stable, biocompatible materials with high catalytic activity for HPRR has resulted in the production of transition metal oxide-based materials [ 8 , 22 , 23 , 24 ] and carbon materials [ 25 , 26 , 27 ].…”

Construction and Application of a Non-Enzyme Hydrogen Peroxide Electrochemical Sensor Based on Eucalyptus Porous Carbon

“…Some non-enzymatic sensors for detecting H 2 O 2 have been reported in the literature. For example, metals like silver platinum, gold or their combination [ 6 , 7 , 8 , 9 , 10 , 11 ]; WS 2 [ 12 ] and electrogenerated ferrites or their combination with carbon nanomaterials [ 13 , 14 ] have been successfully used for the analytical determination of hydrogen peroxide.…”