| Full text | |
| Author(s): |
Cabral, Murilo F.
[1]
;
Nagao, Raphael
[1]
;
Sitta, Elton
[1]
;
Eiswirth, Markus
[2, 3]
;
Varela, Hamilton
[1, 2]
Total Authors: 5
|
| Affiliation: | [1] Univ Sao Paulo, Inst Chem Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] GIST, Ertl Ctr Electrochem & Catalysis, Kwangju 500712 - South Korea
[3] Fritz Haber Inst, D-14195 Berlin - Germany
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Physical Chemistry Chemical Physics; v. 15, n. 5, p. 1437-1442, 2013. |
| Web of Science Citations: | 20 |
| Abstract | |
The problem of non-stationarity in experimentally recorded time-series is common in many (electro)chemical systems. Underlying this non-stationarity is the slow drift in some uncontrollable parameter, and it occurs in spite of the fact that all controllable parameters are kept constant. Particularly for electrochemical systems, some of us have recently suggested {[}J. Phys. Chem. C, 144, (2010), 22262-22268] an empirical method to stabilize experimental time-series. The method was exemplified for the electro-oxidation of methanol and different patterns were satisfactorily stabilized. In this paper we further elaborate some mechanistic aspects of this method and test it for the electro-oxidation of formaldehyde, a system that has some resemblance with the electro-oxidation of methanol, but produces a richer dynamics. In terms of the reaction mechanism, we were able to describe the coupling and to separate the surface processes of the two sub-systems: the fast one (or the core-oscillator) and the slow one, responsible for the drift. (AU) | |
| FAPESP's process: | 12/07882-6 - 2nd Ertl Symposium on Surface and Interface Chemistry |
| Grantee: | Murilo Feitosa Cabral |
| Support type: | Research Grants - Meeting - Abroad |
| FAPESP's process: | 09/07629-6 - Electrocatalysis IV: fundamental and applied aspects of electrocatalytic processes, bio-electrocatalysis and kinetic instabilities |
| Grantee: | Edson Antonio Ticianelli |
| Support type: | Program for Research on Bioenergy (BIOEN) - Thematic Grants |
| FAPESP's process: | 09/00153-6 - Spatio-temporal self-organization in electrocatalysis |
| Grantee: | Raphael Nagao de Sousa |
| Support type: | Scholarships in Brazil - Doctorate |