Effects of the dispersion and Fe content on Fe/C-N electrocatalysts in the selectivity of the carbon dioxide reduction reaction

• Grant number: 19/04700-3
• Support Opportunities: Scholarships in Brazil - Master
• Start date: May 01, 2019
• End date: June 30, 2021
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Edson Antonio Ticianelli
• Grantee: Vitória Pistori Guimarães
• Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

In this work, the carbon dioxide reduction reaction (CDRR) will be investigated in CO2 saturated KHCO3 solutions in Fe/C-N electrocatalysts, which correspond to Fe-containing nitrogen-doped carbon materials prepared by heat treatment of carbon impregnated with several proportions of a Fe-C-N complex, such as Fe[2,4-Tris (2-pyridyl) -1,3,5-triazine]22+ (Fe[TPTZ22+]), to give materials with different Fe contents (1 to 10 wt.%). It is expected to obtain homogeneously distributed Fe nanoparticles in the final material, so that the work must also involve the investigation of the variables involved in the preparation procedure of the catalyst, as well as their detailed characterization. Characterization techniques will comprise x-ray diffraction (XRD), scanning electron (SEM) and transmission (TEM) microscopies, x-ray energy dispersive spectroscopy (EDS) and x-ray photoemission spectroscopy (XPS). The electrochemical studies will comprise experiments of cyclic voltammetry and controlled potential electrolysis. These studies will be completed CDRR effluent analysis by on line differential electrochemical mass spectrometry (on line DEMS) and by gas chromatography analyses, which will be essential to identify and quantify the products formed in the electrode reactions and thus for establishing the faradic yield of the CDRR occurring in the different catalytic materials. (AU)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

GUIMARÃES, Vitória Pistori. Effects of the Fe content in Fe/C-N electrocatalysts in the activity and selectivity of the carbon dioxide reduction reaction. 2021. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Química de São Carlos (IQSC/BT) São Carlos.