Carbon Modified with Vanadium Nanoparticles for Hydrogen Peroxide Electrogeneration

Author(s)

Simas, P. S. ; Antonin, V. S. ; Parreira, L. S. ; Hammer, P. ; Silva, F. L. ; Kronka, M. S. ; Valim, R. B. ; Lanza, M. R. V. ; Santos, M. C.

• Document type: Journal article
• Source: ELECTROCATALYSIS; v. 8, n. 4, p. 311-320, JUL 2017.
• Web of Science Citations: 0

Abstract

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 (H2O2) electrogeneration using the following mass proportions of vanadium on carbon (V/C): 1, 3, 5, 7, 10, and 13%. Best results for H2O2 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 V2O5 phase. X-ray photoelectron spectroscopy (XPS) results of the V/C PPM 7% and V/C SGM 3% samples highlight the predominance of the V2O5 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. (AU)

• FAPESP's process: 11/00002-8 - Study of nanostructure and support influence in Pt, Sn and Ni-based electro catalysts for ethanol oxidation
• Grantee: Luanna Silveira Parreira
• Support type: Scholarships in Brazil - Doctorate (Direct)
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• FAPESP's process: 10/16511-6 - Energy generation from biofuel using nanostructures
• Grantee: Mauro Coelho dos Santos
• Support type: Regular Research Grants
• 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 type: Scholarships in Brazil - Doctorate
• FAPESP's process: 07/04759-0 - Gas diffusion electrodes modified by organometallic compounds for hydrogen peroxide production
• Grantee: Marcos Roberto de Vasconcelos Lanza
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• 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 type: Scholarships in Brazil - Doctorate
• FAPESP's process: 15/10314-8 - Nanostructures for Phenol, Ciprofloxacin and 17±-ethinylestradiol Degradation
• Grantee: Mauro Coelho dos Santos
• Support type: Regular Research Grants