Electrochemical oxidation of Sulfur dioxide onto nanostrutured gold catalysts

• Grant number: 17/09346-8
• Support Opportunities: Scholarships in Brazil - Master
• Start date: July 01, 2017
• End date: January 02, 2020
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Susana Inés Córdoba de Torresi
• Grantee: Renan Lopes Munhos
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 15/26308-7 - Optimization of the physicochemical properties of nano -structured materials for applications in molecular recognition, catalysis and energy conversion/storage, AP.TEM
• Associated scholarship(s): 18/24105-0 - Influence of Au facets on the electroxidation of SO2, BE.EP.MS

Abstract

The increase in global energy demand associated with the idea of eco-sustainability has generated the need of an energy source cheaper and less aggressive to the environment than usual fossil ones. One of the proposals is centered on the use of H2 as a fuel, but its realization would not be achieved by simple electrolysis of water, which requires a potential of 2.0V. The electro-oxidation of the atmospheric pollutant SO2, would be carried out with products of this reaction being H2 and H2SO4. However, this oxidation must be catalyzed to have an appreciable rate. The most classical catalyst used is Pt, but by theoretical and experimental studies it was found that Au would be more efficient compared to other metals; however, the mechanisms by which the reaction is processed are unknown and the existing mechanistic proposals are contradictory. Still thinking about the optimization of the Faradaic process, it is proposed to nanostructure the catalyst in order to verify its influence on the reaction mechanism, as well as the changes caused by different crystallographic faces of the nanoparticles. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DOURADO, ANDRE H. B.; MUNHOS, RENAN L.; SILVA, JR., NORBERTO A.; DEL COLLE, VINICIUS; CARVALHO, GABRIEL G. A.; OLIVEIRA, PEDRO V.; ARENZ, MATTHIAS; VARELA, HAMILTON; CORDOBA DE TORRESI, SUSANA I.. Opportunities and Knowledge Gaps of SO2 Electrocatalytic Oxidation for H-2 Electrochemical Generation. ACS CATALYSIS, v. 9, n. 9, p. 8136-8143, SEP 2019. (13/16930-7, 15/26308-7, 17/09346-8, 13/25592-8, 15/08300-9)

DOURADO, ANDRE H. B.; SILVA-JR, NORBERTO A.; MUNHOS, RENAN L.; DEL COLLE, VINICIUS; ARENZ, MATTHIAS; VARELA, HAMILTON; CORDOBA DE TORRESI, I, SUSANA. Influence of Anion Chaotropicity on the SO2 Oxidation Reaction: When Spectator Species Determine the Reaction Pathway. CHEMELECTROCHEM, v. 7, n. 8, JAN 2020. (15/08300-9, 19/02438-0, 15/26308-7, 13/25592-8, 13/16930-7, 17/09346-8)

DOURADO, ANDRE H. B.; MUNHOS, RENAN L.; VARELA, HAMILTON; CORDOBA DE TORRESI, SUSANA I.; ARENZ, MATTHIAS. Influence of the Electrode and Chaotropicity of the Electrolyte on the Oscillatory Behavior of the Electrocatalytic Oxidation of SO2. Journal of Physical Chemistry C, v. 122, n. 2, p. 1243-1247, JAN 18 2018. (13/16930-7, 15/26308-7, 17/09346-8, 13/25592-8, 15/08300-9)

DOURADO, ANDRE H. B.; DEL COLLE, VINICIUS; MUNHOS, RENAN L.; FELIU, JUAN M.; VARELA, HAMILTON; CORDOBA DE TORRESI, SUSANA, I. SO2 electrooxidation reaction on Pt single crystal surfaces in acidic media: Electrochemical and in situ FTIR studies. Electrochimica Acta, v. 403, p. 12-pg., 2022-01-20. (19/22183-6, 15/26308-7, 17/09346-8, 13/25592-8)

Academic Publications

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

MUNHOS, Renan Lopes. Kinetic and mechanistic study of sulfur dioxide oxidation reaction on Au and Pt electrodes. 2020. Master's Dissertation - Universidade de São Paulo (USP). Conjunto das Químicas (IQ e FCF) (CQ/DBDCQ) São Paulo.