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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.)

On-line mass spectrometry of the electro-oxidation of methanol in acidic media on tungsten carbide

Full text
Author(s):
Angelucci, Camilo A. [1] ; Deiner, L. Jay [1] ; Nart, Francisco C. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Solid State Electrochemistry; v. 12, n. 12, p. 1599-1603, DEC 2008.
Web of Science Citations: 13
Abstract

The electro-oxidation of methanol at supported tungsten carbide (WC) nanoparticles in sulfuric acid solution was studied using cyclic voltammetry, potentiostatic measurements, and differential electrochemical mass spectroscopy (DEMS). The catalyst was prepared by a sonochemical method and characterized by X-ray diffraction. Over the WC catalyst, the oxidation of methanol (1 M in a sulfuric acid electrolyte) begins at a potential below 0.5 V/RHE during the anodic sweep. During potentiostatic measurements, a maximum current of 0.8 mA mg(-1) was obtained at 0.4 V. Measurements of DEMS showed that the methanol oxidation reaction over tungsten carbide produces CO2 (m/z=44); no methylformate (m/z=60) was detected. These results are discussed in the context of the continued search for alternative materials for the anode catalyst of direct methanol fuel cells. (AU)

FAPESP's process: 04/03051-6 - Spectroscopic characterization of model surfaces
Grantee:Lazarus Jason Deiner
Support Opportunities: Scholarships in Brazil - Post-Doctoral