Advanced search
Start date
Betweenand
Conteúdos relacionados
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The effect of solution pH on the oscillatory electro-oxidation of methanol

Full text
Author(s):
Melle, Gabriel B. [1] ; Hartl, Fabian W. [2] ; Varela, Hamilton [2] ; Sitta, Elton [1]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Carlos, Rod Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil
[2] Inst Chem Sao Carlos, Ave Trabalhador Sao Carlense 400, BR-13566956 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 826, p. 164-169, OCT 1 2018.
Web of Science Citations: 4
Abstract

The methanol electro-oxidation reaction (MER) was studied in a wide pH range under voltammetric and oscillatory regimes. Employing buffered hydrogen phosphates solutions, it was demonstrated that increasing the pH MER is firstly inhibited in the region up to 4-5 but after this point starts to increase reaching currents 5 times bigger than those in acidic media. Potential oscillations during MER are restricted to the pH < 3.5. While the oscillations frequency and shape change slightly in the studied pH range, the amplitude and poisoning rate, calculated in terms of dE/dt, are severely affected by the pH, culminating in the extinguishment of oscillations. (AU)

FAPESP's process: 14/23916-3 - Instabilities in electrocatalysis: complex kinetics catalyzed by model Pt surfaces, Au and microelectrodes
Grantee:Elton Fabiano Sitta
Support Opportunities: Regular Research Grants
FAPESP's process: 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion
Grantee:Edson Antonio Ticianelli
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 14/08030-9 - Electrocatalysis under oscillatory regime: in situ IR spectroscopy in ATR-SEIRAS configuration
Grantee:Fabian Hartl
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)