STUDY OF REDOX REVERSIBILITY OF COPPER-BASED CATALYSTS FOR APPLICATION IN A PHOTO-THERMOCATALYTIC SYSTEM FOR "DAY-AND-NIGHT" CO2 HYDROGENATION.

• Grant number: 22/07347-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2023
• End date: February 28, 2027
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Cauê Ribeiro de Oliveira
• Grantee: Gustavo Duran Iga
• Host Institution: Embrapa Instrumentação Agropecuária. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA). Ministério da Agricultura, Pecuária e Abastecimento (Brasil). São Carlos , SP, Brazil
• Associated research grant: 18/01258-5 - Novel chemical catalytic and photocatalytic processes for the direct conversion of methane and CO2 to products, AP.TEM
• Associated scholarship(s): 24/03871-7 - Cu-based SnO2 nanowires and their application in a photothermal CO2 hydrogenation reaction., BE.EP.DR

Abstract

The increasing concentration of atmospheric CO2 from anthropogenic sources is generating great concern for worldwide organizations. Therefore, the hydrogenation of this residue, which is obtained in high purity in agro-industrial processes, can be a promising alternative for generating high-value hydrocarbons. In this context, the present project aims to understand the hydrogenation process catalyzed by copper-based catalysts, comparing the mechanisms present in the photoactivated and thermoactivated route. The main motivation lies in the fact that the effective incidence of sunlight as a source of electrons for the reaction is limited to a few hours a day, requiring the development of an interchangeable system that acts during the day and night. Thus, as the mechanisms of CO2 reduction on copper catalysts might coexist in photo and thermocatalysis, this study aims to investigate the best conditions and similarities in these two isolated reaction pathways. In the future, it will be proposed the application of a day-and-night system in the same uninterrupted reactor, seeking to achieve an optimal yield window for products. For this, this scientific project will develop a fundamental study to identify the importance of the Cu0/Cu+/Cu+2 species that are reversibly present in each catalytic pathway.

Scientific publications

(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)

NASCIMENTO, VICTOR R. S.; TORRES, JULIANA A.; IGA, GUSTAVO D.; DOS SANTOS, ALLEF LEITE; EGUES, SILVIA M.; FILHO, JOSE B. G.; FERREIRA, LUIZ F. R.; RIBEIRO, CAUE. CO₂ Photoreduction Product Selectivity with TiO₂-Cu Nanocatalysts under Different Reaction Media. CHEMCATCHEM, v. 16, n. 11, p. 12-pg., 2024-03-04. (22/07347-5, 18/01258-5)

IGA, GUSTAVO D.; FILHO, JOSE B. G.; TORRES, JULIANA A.; VIEIRA, JOSE LUCAS; RIBEIRO, CAUE. Reproducibility in Artificial Photosynthesis: A Case Study on SnO₂/Cu Photocatalysts. CHEMCATCHEM, v. N/A, p. 10-pg., 2025-06-15. (20/04109-0, 22/07347-5, 23/10329-1, 24/03871-7)