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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Valim, Ricardo B. [1, 2] ; Trevelin, Leandro C. [2] ; Sperandio, Daniel C. [1] ; Carneiro, Jussara F. [2] ; Santos, Mauro C. [3] ; Rodrigues, Liana A. [1] ; Rocha, Robson S. [1] ; Lanza, V, Marcos R.
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Lorena Sch Engn, Estr Municipal Campinho Sn, BR-12602810 Lorena, SP - Brazil
[2] V, Univ Sao Paulo, Sao Carlos Inst Chem, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos, SP - Brazil
[3] Fed Univ ABC, Lab Electrochem & Nanostruct Mat, Ctr Nat & Human Sci, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 9, n. 6 DEC 2021.
Web of Science Citations: 0
Abstract

The present study investigates the modification of carbon black with ruthenium and niobium oxides and the application of the modified carbon material for the electrogeneration of hydrogen peroxide via oxygen reduction reaction. The modified carbon materials were characterized electrochemically using the porous microlayer technique on rotating ring-disc electrode. The modification of amorphous carbon black with 5.0% Ru05Nb95O (5.0% Ru05Nb95O/C) contributed to the enhancement of selectivity toward H2O2 electrogeneration, with current efficiency of 84.6% and a shift in potential of - 0.300 V. The most efficient material (5.0% Ru05Nb95O/C) was characterized by X-ray absorption spectroscopy, X-ray fluorescence and scanning electron microscopy. The application of gas diffusion electrodes for H2O2 generation in acid medium yielded 281.6 mg L-1 of H2O2 in 120 min of experiment at current density of 100 mA cm(-2). The concentration of H2O2 electrogenerated on the modified carbon material was 33.6% higher compared to the concentration electrogenerated on the unmodified carbon material (210.8 mg L-1) under the same experimental conditions. (AU)

FAPESP's process: 11/14314-1 - Study of the modification of gas diffusion electrodes with redox catalysts for in situ electrogeneration of hydrogen peroxide (H2O2)
Grantee:Marcos Roberto de Vasconcelos Lanza
Support Opportunities: Regular Research Grants
FAPESP's process: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination
Grantee:Marcos Roberto de Vasconcelos Lanza
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/12597-0 - Gas difusion electrodes production modified with bimetallic oxides of Nb, Mo, Pd e Zr for the production of H2O2 in situ
Grantee:Leandro Cesar Trevelin
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 18/10492-1 - Photocatalytic evaluation of heterojunctions semiconductor/ZnO/carbon xerogel in the photodegradation of 4-chlorophenol in both fluidized bed and batch reactors
Grantee:Liana Alvares Rodrigues
Support Opportunities: Regular Research Grants
FAPESP's process: 19/00239-0 - "Synthesis and characterization of new electrocatalysts for hydrogen peroxide electrogeneration"
Grantee:Jussara Fernandes Carneiro
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/16690-6 - Study of the degradation of the antibiotics amoxicillin and ampicillin using gas diffusion electrodes modified with quinones (2-tert-butyl-9 ,10-anthraquinone and 2-ethyl-9,10-anthraquinone)
Grantee:Fernando Lindo Silva
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 13/02762-5 - Development of technologies to prevent pollution: degradation and monitoring online of antibiotics in sewage
Grantee:Robson da Silva Rocha
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support Opportunities: Research Projects - Thematic Grants