Surface and Catalytical effects on Treated Carbon Materials for Hydrogen Peroxide Electrogeneration

Author(s)

Moraes, A. ^[1] ; Assumpcao, M. H. M. T. ^[1] ; Simoes, F. C. ^[1] ; Antonin, V. S. ^[1] ; Lanza, M. R. V. ^[2] ; Hammer, P. ^[3] ; Santos, M. C. ^[1]

Affiliation

^[1] Univ Fed ABC, UFABC, CCNH, LEMN, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP - Brazil

^[2] Univ Sao Paulo, Inst Quim Sao Carlos, Caixa Postal 780, BR-13566590 Sao Carlos, SP - Brazil

^[3] Univ Estadual Paulista, UNESP, Inst Quim, BR-14800060 Araraquara, SP - Brazil

• Document type: Journal article
• Source: ELECTROCATALYSIS; v. 7, n. 1, p. 60-69, JAN 2016.
• Web of Science Citations: 9

Abstract

This work focuses on the catalytic activity and surface modification of Vulcan XC 72R and Printex L6 toward the oxygen reduction reaction (ORR) after the carbon supports were subjected to a pre-treatment with nitric acid or ammonia. The results indicated that acid-treated Printex L6 was the best-suited material toward the two-electron pathway of the ORR. This material contained the largest concentration of oxygenated acid species and hydrogen, as determined by XPS, the Boehm method, and elemental analysis. The enhanced formation of H2O2 for acid-treated Printex L6 can be explained by the presence of oxygenated acid species increasing the hydrophilic character of the carbon support. The hydrophilicity of the material was investigated by contact angle measurements. However, the changes of the surface area, porosity, and the aliphatic chains of the carbons induced by the pre-treatments and the contributions of these factors to H2O2 production cannot be disregarded. (AU)

• FAPESP's process: 07/04759-0 - Gas diffusion electrodes modified by organometallic compounds for hydrogen peroxide production
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Regular Research Grants
• FAPESP's process: 09/09145-6 - Study of ethanol electrochemical oxidation mechanism on PtSn, PtCe and PtSnCe using in-situ spectroscopic techniques
• Grantee: Rodrigo Fernando Brambilla de Souza
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/04539-3 - Synthesis and characterization of nanostructured electrocatalysts for hydrogen peroxide in situ obtention and subsequent degradation of organic pollutants
• Grantee: Mônica Helena Marcon Teixeira Assumpção
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 11/21656-6 - Binary nanostructured materials based on metals in electrogeration of hydrogen peroxide for ciprofloxacin degradation
• Grantee: Vanessa da Silva Antonin
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 09/07859-1 - Development of voltammetric electronic tongues towards the characterization and identification of adulteration and falsification processes of biofuels
• Grantee: Thiago Regis Longo Cesar da Paixão
• Support Opportunities: Regular Research Grants