Electrocatalysis of Hydrogen Peroxide Generation Using Oxygen-Fed Gas Diffusion Electrodes Made of Carbon Black Modified with Quinone Compounds

Tailoring the ORR selectivity for H2O2 electrogeneration by modification of Printex L6 carbon with 1,4-naphthoquinone: a theoretical, experimental and environmental application study

“…The modification of carbon-based materials with organic redox compounds has been shown to increase the reaction activity by B400 mV and can lead to more than 90% selectivity for H 2 O 2 . 40,47,53 Two studies that deserve mentioning here are the studies reported by Valim et al (2013) and Rocha et al (2020), which obtained 95 and 89% selectivity after modifying the carbon matrix with 1.0% tert-butyl-anthraquinone and 1.0% 1,2-dihydroxyanthraquinone, respectively. 18,40 In the present work, the modification of PL6C with 1.0% NQE resulted in higher ORR activity, shifting the onset reaction potential to B60 mV compared to the unmodified carbon matrix, in addition to increasing the selectivity for H 2 O 2 production to B93%.…”

“…In order to improve the ORR activity toward H 2 O 2 production, some authors have proposed different techniques for modifying carbon-based materials, including the use of metallic oxides, [35][36][37] metallic complexes, 19,32 metallic nanoparticles 38,39 and organic compounds. 18,26,[40][41][42] These modifications can lead to a decrease of the overpotentials required for the ORR and an improvement of oxygen supply in solution, increasing the H 2 O 2 generation.…”

Modification of Carbon Black with Hydrogen Peroxide for High Performance Anode Catalyst of Direct Methanol Fuel Cells

“…Carbon black is a very good electrocatalyst since it has very high conductivity and stability [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. However, it lacks functional groups on the surface, resulting in low metal-support interaction and low metal dispersion and large metal particle size.…”

“…This results in the low activity of fuel cells. Various oxidants, such as H 2 O 2 [ 9 , 10 ], HNO 3 [ 11 ], NaOH [ 12 ] and O 3 [ 15 ] have been used to modify the surface of carbon black to create more function groups on the surface [ 16 , 17 , 18 ]. It is believed that this will result in a high metal-support interaction and high metal dispersion.…”

Graphene-Modified Composites and Electrodes and Their Potential Applications in the Electro-Fenton Process

“…Not only is this reaction highly relevant to E-Fenton, but H 2 O 2 is used in a number of other applications and it is currently formed using an energy-demanding anthraquinone oxidation process [28]. Consequently, it is no surprise that, in the past decade, considerable attention has been devoted to designing new materials that can be employed to generate H 2 O 2 through the two-electron reduction of dissolved oxygen [29,30]. Despite this considerable interest, the origin of the selectivity is still poorly understood.…”