The oscillatory electro-oxidation of formic acid: Insights on the adsorbates involved from time-resolved ATR-SEIRAS and UV reflectance experiments

Author(s)

Hartl, Fabian W. ^[1] ; Varela, Hamilton ^[1] ; Cuesta, Angel ^[2]

Affiliation

^[1] Univ Sao Paulo, Inst Chem Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Aberdeen, Sch Nat & Comp Sci, Dept Chem, Aberdeen AB24 3UE - Scotland

• Document type: Journal article
• Source: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 840, p. 249-254, MAY 1 2019.
• Web of Science Citations: 0

Abstract

Galvanostatic potential oscillations during the oxidation of formic acid were studied by time-resolved Surface Enhanced Infrared Absorption Spectroscopy in the attenuated total reflection configuration (ATR-SEIRAS) and reflectance measurements in the ultraviolet (UV) region. ATR-SEIRAS allowed monitoring oscillations in the coverage of adsorbed CO (COad) and adsorbed bridge-bonded formate (HCOObi), while UV reflectance revealed oscillations in the coverage by specifically adsorbed anions (namely, adsorbed sulfate). The potential oscillations and the coverage of all these species are strongly interconnected, and an analysis of their correlation provides detailed insight into the autocatalytic loop responsible for the emergence of non-linear dynamics. (AU)

• 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: 17/07286-8 - Electrocatalysis under oscillatory regime: in situ IR spectroscopy in ATR-SEIRAS configuration and spatiotemporal patterns
• Grantee: Fabian Hartl
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
• 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)