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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.)

Influence of the preparation method and the support on H2O2 electrogeneration using cerium oxide nanoparticles

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Author(s):
Assumpcao, M. H. M. T. [1] ; Moraes, A. [1] ; De Souza, R. F. B. [1] ; Calegaro, M. L. [2] ; Lanza, M. R. V. [2] ; Leite, E. R. [3] ; Cordeiro, M. A. L. [3] ; Hammer, P. [4] ; Santos, M. C. [1]
Total Authors: 9
Affiliation:
[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Lab Eletroquim & Mat Nanoestruturados, BR-09210170 Santo Andre, SP - Brazil
[2] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
[3] Univ Fed Sao Carlos, Dept Quim, LIEC, CMDMC, BR-13565905 Sao Carlos, SP - Brazil
[4] Univ Estadual Paulista, UNESP, Inst Quim, BR-14800060 Araraquara, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Electrochimica Acta; v. 111, p. 339-343, NOV 30 2013.
Web of Science Citations: 15
Abstract

This work describes the influence of the preparation method and the carbon support using a low content of cerium oxide nanoparticles (CeO2/C 4%) on H2O2 electrogeneration via the oxygen reduction reaction (ORR). For this purpose, the polymeric precursor (PPM) and sol-gel (SGM) methods with Vulcan XC 72R (V) and Printex L6 (P) supports were employed. The materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The XRD analysis identified two phases comprising CeO2 and CeO2,. The smallest mean crystallite size was exhibited for the 4% CeO2/C\_PPM\_P material, which was estimated using the Debye-Scherrer equation to be 6 nm and 4 nm for the CeO2 and the CeO2, phases, respectively, and was determined by TEM to be 5.9 nm. XPS analysis was utilized to compare the oxygen content of the 4% CeO2/C\_PPM\_P to Printex L6. The electrochemical analysis was accomplished using a rotating ring-disk electrode. The results showed that the 4% CeO2/C specimen, prepared by PPM and supported on Printex L6, was the best electrocatalyst for H2O2 production in 1 mol L-1 NaOH. This material showed the highest ring current, producing 88% H2O2 and transferring 2.2 electrons per 02 molecule via the ORR at the lowest onset potential. Additionally, the ring-current of the 4% CeO2/C\_PPM\_P material was higher than that of Vulcan XC 72R and Printex L6, the reference materials for H2O2 production, indicating the highest electrocatalytic activity for the 4% CeO2/C\_PPM\_P material. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/03516-5 - OXIDES-C SUPPORTED ELECTROCATALYSTS FOR DIRECT LIQUID FUEL CELL ANODES
Grantee:Rodrigo Fernando Brambilla de Souza
Support type: Scholarships in Brazil - Post-Doctorate
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: 07/04759-0 - Gas diffusion electrodes modified by organometallic compounds for hydrogen peroxide production
Grantee:Marcos Roberto de Vasconcelos Lanza
Support type: Regular Research Grants
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 type: 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 type: 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 type: Scholarships in Brazil - Doctorate (Direct)