Characterization of interfacial electrochemical reactions by in situ FTIR. Multi-User Equipment aproved in grant 2013 / 16930-7. Fourier Transform Infrared spectrometer with dedicated potentiostat

• Grant number: 14/22233-0
• Support Opportunities: Multi-user Equipment Program
• Duration: June 01, 2015 - May 31, 2017
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Edson Antonio Ticianelli
• Grantee: Edson Antonio Ticianelli
• Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion, AP.TEM
• EMU web page: Página do Equipamento Multiusuário não informada
• Type of equipment: Caracterização de Materiais - Espectroscopia - Infravermelho
• Manufacturer: Fabricante não informado
• Model: Modelo não informado

Abstract

According to the Thematic Project FAPESP (Proc. No 2013/16930-7), which resulted in the approval of this equipment (FTIR system), its use will be mostly devoted to investigations of the electrode/solution interface that require the use of a high resolution spectrometer, allowing the band separation or absorption peaks in the infrared. This is critical when studying involves the electro-oxidation of organic and inorganic molecules with several (parallel) reaction products, such as formic acid, ethanol, glycerol and borohydride ions. Furthermore, this equipment allows performing experiments at low wave numbers (below 400 cm-1), which provides access to information directly related to Metal-carbon bond (or Metal-Metal-nitrogen or oxygen, depending on the investigated reaction), and thus, fundamental to the advancement of research involving numerous systems, in various areas of electrocatalysis. The system will also have a Rapid Scan accessory, which can be employed to expand the possibilities of in-situ studies in electrocatalysis, for example, time-resolved spectroscopy. One of the most important reactive intermediates in electrochemical oxidation reactions of organic molecules is adsorbed carbon monoxide. This fact conducts to its surface accumulation, and this is a function of its degree of overlap among the different adsorbed setups. This leads to a reactive dynamics that can be studied by time-resolved spectroscopy. In addition, this accessory can be used for studying the formation and accumulation of CO without the need to reveal different intermediate species and other reaction products. Considering the above-mentioned aspects, it becomes clear that the present system will be dedicated and set experimentally to conduct in situ research in electrochemistry, in particular electrocatalysis. This is most evident by the fact that the system will be accompanied by a galvanostat/potenciostat equipment, which will be dedicated to the FTIR system. Moreover, a software will command both devices, which is important mainly for kinetic investigations. (AU)