Oxygen reduction reaction: Semi-empirical quantum mechanical and electrochemical study of Printex L6 carbon black

One-step preparation of Co2V2O7: synthesis and application as a Fenton-like catalyst in a gas diffusion electrode

“…To perform the spectral analysis, potentials were chosen from three different regions observed during the LSV analysis. These regions, which have already been described by our research group, 11 are related to the adsorption/ activation of oxygen on the surface of carbon and are limited by mass transport and the limiting current. For data adjustment purposes, an electrical equivalent circuit (EC) proposed by Kwon et al 48 was used; this electrical circuit is commonly used in the literature for this type of porous carbonaceous materials.…”

“…This behavior was expected since this type of carbon exhibits a good ORR activity. 11 Given the above observations, a more detailed study was carried out in order to determine the number of electrons and the selectivity of the material for H 2 O 2 using linear sweep voltammetry coupled to a rotating ring disk electrode (RRDE). The rotation speed (o) of the system ranged between 100 and 2500 rpm.…”

“…3 One of these modifiers which has attracted considerable attention is Printex L6 carbon (PL6C); this carbon material is relatively less expensive and has been found to have good energetic efficiency. 5,11 To help enhance the efficiency of carbon-modified GDEs, different electrocatalysts have also been incorporated into the CMs; some of the electrocatalysts used have included organic compounds, 5 oxides, 9 nanoparticles, 3 and metal-organic frameworks (MOFs). 12 Oxide electrocatalysts can function via oxygen adsorption processes or by mediating the reduction process.…”

Bisphenol-S removal via photoelectro-fenton/H2O2 process using Co-porphyrin/Printex L6 gas diffusion electrode

“…GDEs are composed of an amorphous carbon black matrix and an agglomerating agent known as polytetrafluorethylene (PTFE); these materials form a multichannel structure which allows the flow of oxygen and partial penetration of solution in the device. Previous studies reported in the literature have shown that Printex L6 carbon is one of the best cathodic materials for the electrogeneration of H2O2 in ORR via 2 e - [23,24]. However, the application of this cathodic material (Printex L6 carbon) in ORR leads to high energy consumptionthus, energy consumption is one of the limiting factors of the reaction.…”

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

“…18,[24][25][26] Printex L6 (PL6C) is a carbon black pigment employed as a high efficiency electrocatalytic matrix for H 2 O 2 electrogeneration; its good performance can be attributed to corrosion resistance, large surface area (265 m 2 g À1 ) and oxygenated functional groups (-C-OOH, -CQO, -C-OH). 27 Furthermore, the hydrophobicity of PL6C, associated with the role in the oxygen reduction reaction (ORR), provides high selectivity for H 2 O 2 28,29 and makes it ideally suitable for the application of O 2 gas at the electrolyte/electrode interface in GDE reactions. 23,30 The use of the triple interface electrolyte/electrode/gas in acid medium for PL6C in GDE reactions allows the occurrence of the ORR involving 2-electron transfer, leading to the production of H 2 O 2 molecules (eqn (1)).…”