Using carbon black modified with Nb2O5 and RuO2 for enhancing selectivity toward H2O2 electrogeneration

Valim, Ricardo Bertholo; Trevelin, Leandro C.; Sperandio, Daniel Couto; Carneiro, Jussara F.; Santos, Mauro C.; Rodrigues, Liana Álvares; Rocha, Robson S.; Lanza, Marcos R. V.

doi:10.1016/j.jece.2021.106787

Cited by 13 publications

(1 citation statement)

References 41 publications

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“…GDE is a versatile electrode applied in H 2 O 2 generation; this electrode can be constructed using a catalytic mass composed of carbon only [20], or carbon modi ed with different substances [25,27]. The use of niobium to modify the carbon to obtain Nb 2 O 5 /C is of interest, as the use of this oxide is reported in the literature as having an effect of shifting the onset in the potential to fewer negatives potentials and also increasing the selectivity towards the 2-electrons pathway, increasing the generation of the H 2 O 2 [28,29].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin

Valim,

Carneiro,

Lourenço

et al. 2023

J Appl Electrochem

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The present work sought to investigate H 2 O 2 generation using a gas diffusion electrode composed of carbon with niobium oxide for the degradation of levo oxacin. Results showed that the oxide formed was Nb 2 O 5 (crystallographic structure was con rmed by XRD; chemical composition detected by XPS) and the increase in the Nb/C ratio led to more crystalline structure and higher crystallite size. The carbon with 5% Nb 2 O 5 presented an average particle size of 5.6 nm and this material led to the generation of the highest amount of H 2 O 2 (317.6 mg L − 1 ). The C/5% Nb 2 O 5 -modi ed GDE was applied for the degradation of levo oxacin in an acid medium, in the presence and absence of Fe 2+ ions. Long-term experiments conducted for the analysis of the time required for the total removal of levo oxacin showed that 96% of levo oxacin and 66% of organic load were removed in 270 min of treatment at the current density of 100 mA cm − 2 . HighlightsNb 2 O 5 on carbon increased the H 2 O 2 generation by 236% compared to unmodi ed carbon In 90 min, 46% of the organic load was removed at 100 mA cm -2 Levo oxacin degradation, in 270 min, reached 96% at 100 mA cm -2

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Section: Introductionmentioning

confidence: 99%

Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin

Valim,

Carneiro,

Lourenço

et al. 2023

J Appl Electrochem

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Boosting the O₂‐to‐H₂O₂ Selectivity Using Sn‐Doped Carbon Electrocatalysts: Towards Highly Efficient Cathodes for Actual Water Decontamination

Zhao,

Mazzucato,

Lanzalaco

et al. 2024

ChemSusChem

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The high cost and often complex synthesis procedure of new highly selective electrocatalysts (particularly those based on noble metals) for H2O2 production are daunting obstacles to penetration of this technology into the wastewater treatment market. In this work, a simple direct thermal method has been employed to synthesize Sn‐doped carbon electrocatalysts, which showed an electron transfer number of 2.04 and outstanding two‐electron oxygen reduction reaction (ORR) selectivity of up to 98.0 %. Physicochemical characterization revealed that this material contains 1.53 % pyrrolic nitrogen, which is beneficial for the production of H2O2, and ‐C≡N functional group, which is advantageous for H+ transport. Moreover, the high volume ratio of mesopores to micropores is known to favor the quick escape of H2O2 from the electrode surface, thus minimizing its further oxidation. A purpose‐made gas‐diffusion electrode (GDE) was prepared, yielding 20.4 mM H2O2 under optimal electrolysis conditions. The drug diphenhydramine was selected for the first time as model organic pollutant to evaluate the performance of an electrochemical advanced oxidation process. In conventional electro‐Fenton process (pH 3), complete degradation was achieved in only 15 min at 10 mA cm−2, whereas at natural pH 5.9 and 33.3 mA cm−2, almost overall drug removal was reached in 120 min.

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Synthesis of activated carbon from sugarcane bagasse using blends of hydroxides for maximizing reaction targeted at obtaining hydrogen peroxide

Pôrto,

Lourenço,

Nogueira

et al. 2024

Biomass and Bioenergy

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Using carbon black modified with Nb2O5 and RuO2 for enhancing selectivity toward H2O2 electrogeneration

Cited by 13 publications

References 41 publications

Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin

Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin

Boosting the O₂‐to‐H₂O₂ Selectivity Using Sn‐Doped Carbon Electrocatalysts: Towards Highly Efficient Cathodes for Actual Water Decontamination

Synthesis of activated carbon from sugarcane bagasse using blends of hydroxides for maximizing reaction targeted at obtaining hydrogen peroxide

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Using carbon black modified with Nb2O5 and RuO2 for enhancing selectivity toward H2O2 electrogeneration

Cited by 13 publications

References 41 publications

Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin

Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin

Boosting the O2‐to‐H2O2 Selectivity Using Sn‐Doped Carbon Electrocatalysts: Towards Highly Efficient Cathodes for Actual Water Decontamination

Synthesis of activated carbon from sugarcane bagasse using blends of hydroxides for maximizing reaction targeted at obtaining hydrogen peroxide

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Boosting the O₂‐to‐H₂O₂ Selectivity Using Sn‐Doped Carbon Electrocatalysts: Towards Highly Efficient Cathodes for Actual Water Decontamination