Use of a vanadium nanostructured material for hydrogen peroxide electrogeneration

Moraes, Adriel S.; Assumpção, M.H.M.T.; Papai, Rodrigo; Gaubeur, Ivanise; Rocha, Robson S.; Reis, Rafael M.; Calegaro, Marcelo L.; Lanza, Marcos R.V.; Santos, Mauro C.

doi:10.1016/j.jelechem.2014.02.009

Cited by 50 publications

(30 citation statements)

References 40 publications

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“…For V 2 O 5 , the peaks at 26°, 31°, 34°, and 46°showed reduced intensity, suggesting amorphous vanadium oxide phase. The appearance of these XRD peaks is assigned to the vanadium oxide layer formed on the carbon support [46,57] showing amorphous phase, changing the initial characteristics of the peaks; these characteristics are due to carbon, which shows large peaks at 28°and 36°.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

“…In the search for novel electrocatalyst systems used in ORR, the use of vanadium supported on black carbon produced for the PPM and SGM was chosen in this work [45,46]. The mineral is very abundant in Brazil (Maracás mine, Bahia) and can be produced at reduced extracting costs [47].…”

Section: Introductionmentioning

confidence: 99%

“…Vanadium and related compounds have been studied and proved to have favorable properties regarding H 2 O 2 electrogeneration [45,46]. The most stable compound of V 2 O 5 has been shown to be very promising due to its interesting physical and chemical properties; the most beneficial properties include its stability, acidity, structure, and formation of layers that behave as a single-phase system due to the strong interactions at the oxide-water interface.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, vanadium oxide-based electrocatalysts supported on the carbon surface are considered very promising for use in AOPs, coupled with electrochemical methods for the treatment of organic water pollutants, as well as in the treatment of wastewater by fostering interest in microscale production of H 2 O 2 . Considering that no studies have considered vanadium on carbon (V/C) nanostructures prepared by both methods (PPM and SGM) and the quantity of reagents utilized in a previous study was different [46], this work will compare the influence of the preparation method on carbon modification using different vanadium ratios for peroxide electrogeneration electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

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Carbon Modified with Vanadium Nanoparticles for Hydrogen Peroxide Electrogeneration

et al. 2017

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This paper compares the results of two preparation routes for the production of carbon (Vulcan XC 72R) modified with vanadium nanostructured electrocatalysts for hydrogen peroxide (H 2 O 2) electrogeneration using the following mass proportions of vanadium on carbon (V/C): 1, 3, 5, 7, 10, and 13%. Best results for H 2 O 2 electrogeneration were obtained using a V/C sol-gel method (SGM) with 3%, highest ring currents. For oxygen reduction reaction (ORR), using the V/C SGM with 3% and V/C polymeric precursor method (PPM) with 7%, the results of ring currents measured are very high when compared to Vulcan XC 72R. X-ray diffraction (XRD) analysis mainly showed the V 2 O 5 phase. X-ray photoelectron spectroscopy (XPS) results of the V/C PPM 7% and V/C SGM 3% samples highlight the predominance of the V 2 O 5 phase and, for the latter catalyst, a more oxidized carbon surface. For the most promising electrocatalysts, the contact angle was evaluated, showing that the anchoring of the metal in the carbon surface increases the hydrophilicity of the materials. The prepared materials are promising for peroxide electrogeneration mainly due to the synergetic effect of vanadium oxide nanoparticles and acid oxygen species of the carbon, contributing to enhancing catalyst hydrophilicity.

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Section: X-ray Diffraction Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Carbon Modified with Vanadium Nanoparticles for Hydrogen Peroxide Electrogeneration

et al. 2017

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“…2,7,24,25 With typical multifactor experiments, different operating conditions should therefore be employed to achieve a higher H 2 O 2 concentration and current efficiency. It is well documented in the literature that the efficiency of the electrolytic process depends on the pH, current density, air ow rate, supporting electrolyte and electrolytic time.…”

Section: Introductionmentioning

confidence: 99%

In situ electrosynthesis of hydrogen peroxide with an improved gas diffusion cathode by rolling carbon black and PTFE

Luo

et al. 2015

RSC Adv.

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A simply structured gas diffusion electrode (GDE) was constructed by rolling carbon black and PTFE as a conductive catalyst layer to enhance the producibility of hydrogen peroxide. A Box-Behnken design (BBD) coupled with response surface methodology was employed to assess the individual and interactive effects of the three main independent parameters (pH, current density and air flow rate) on the H 2 O 2 concentration. Analysis of variance (ANOVA) showed a high coefficient of determination value. Optimal operating conditions were a pH value of 4.0, current density of 52 mA cm À2 , and an air flow rate of 55 mL min À1 . The predicted H 2 O 2 concentration under the optimal conditions determined by the proposed model was 309.85 mM, demonstrating the improved GDE without using noble metals and other chemical promoters is a potential method for in situ electrosynthesis of H 2 O 2 . Results also revealed that the current density, air flow rate, and their interaction effect had a significant effect on the H 2 O 2 concentration, whereas changes to the initial pH had no apparent effect. Experiments showed that current density has a direct effect on the decomposition reaction in the electrolytic process.

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In Situ Electrochemical Generation of Hydrogen Peroxide in Alkaline Aqueous Solution by using an Unmodified Gas Diffusion Electrode

et al. 2015

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Hydrogen peroxide (H2O2) is an oxidizing agent commonly used for various applications and is available in aqueous solution in a wide range of concentrations. This work describes the H2O2 electrogeneration process in alkaline medium (KOH 1.0 mol L−1), using an unmodified gas diffusion electrode (GDE) manufactured with Printex 6L carbon. The experiments were performed in a single‐compartment electrochemical cell equipped with a GDE as the working electrode, which was fed with N2 or O2 at a pressure of 0.2 bar. Electrolysis experiments were performed at a constant potential (−0.5≤E≤−1.4 V) for 90 min. The H2O2 concentration reached a maximum value of 3370 mg L−1 at −1.1 V (vs. Ag/AgCl), and H2O2 electrogeneration followed pseudo‐zero‐order kinetics with an apparent rate constant kapp=59.7 mg L−1 min−1. A low energy consumption of 8.0 kWh kg−1 was calculated for these electrogeneration conditions.

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Use of a vanadium nanostructured material for hydrogen peroxide electrogeneration

Cited by 50 publications

References 40 publications

Carbon Modified with Vanadium Nanoparticles for Hydrogen Peroxide Electrogeneration

Carbon Modified with Vanadium Nanoparticles for Hydrogen Peroxide Electrogeneration

In situ electrosynthesis of hydrogen peroxide with an improved gas diffusion cathode by rolling carbon black and PTFE

In Situ Electrochemical Generation of Hydrogen Peroxide in Alkaline Aqueous Solution by using an Unmodified Gas Diffusion Electrode

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