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

Electrooxidation of Acetaldehyde on Pt(111) Surface Modified by Random Defects and Tin Decoration

Full text
Author(s):
Barbosa, A. F. B. [1, 2] ; Del Colle, V. [3] ; Previdello, B. A. F. [1] ; Tremiliosi-Filho, G. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Chem Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil
[2] Fed Inst Alagoas, Campus Penedo, Rod Engn Joaquim Goncalves S-N, BR-57200000 Penedo, AL - Brazil
[3] Univ Fed Alagoas, Dept Chem, Campus Arapiraca, Av Manoel Severino Barbosa S-N, BR-57309005 Arapiraca, AL - Brazil
Total Affiliations: 3
Document type: Journal article
Source: ELECTROCATALYSIS; v. 12, n. 1, p. 36-44, JAN 2021.
Web of Science Citations: 0
Abstract

Acetaldehyde oxidation was studied on well-ordered Pt(111), stepped Pt(554), and disordered Pt(111). Random superficial defects of the [110]-type were electro-generated on well-ordered Pt(111) surface by successive potential cycling at 0.05 V s(-1) between 0.05 and 1.3 V in 0.1 M HClO4 solution. In general, well-ordered Pt(111) is more active than stepped or disordered platinum surfaces for acetaldehyde oxidation. The reaction follows a dual pathways mechanism, leading each pathway to CO2 and acetic acid, respectively, as final products. The CO2 is produced via adsorbed CO and CHx reaction intermediates. Acetic acid comes from the adsorbed acetaldehyde oxidation. Additionally, acetaldehyde was also investigated on well-ordered Pt(111) and disordered Pt(111) surfaces, both modified by deposited tin submonolayers. An outstanding performance was observed when both, well-ordered and disordered Pt(111) surfaces, were modified by Sn. It was observed an extraordinary displacement of the onset potential for more negative potentials and an increased production of CO2 and acetic acid. (AU)

FAPESP's process: 16/13100-1 - Studies of ethanol and glycerol electro-oxidation reactions on surface modified platinum and gold single crystals
Grantee:Amaury Franklin Benvindo Barbosa
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 19/22183-6 - Electrocatalysis VI: fundamental and applied aspects of emerging and classical problems in electrochemical energy conversion
Grantee:Edson Antonio Ticianelli
Support Opportunities: Research Projects - Thematic Grants