Microwave-assisted hydrothermal synthesis of Sn₃O₄ and SnO for electrocatalytic reduction of CO₂ to highadded-value compounds

Author(s)

Romeiro, Fernanda da Costa ; Martins, Alysson Stefan ; Lima Perini, Joao Angelo ; Costa e Silva, Beatriz ; Boldrin Zanoni, Maria Valnice ; Orlandi, Marcelo Ornaghi

• Document type: Journal article
• Source: Journal of Materials Science; v. 58, n. 8, p. 12-pg., 2023-02-01.

Abstract

Sn-based electrocatalysts have recently been applied for CO2 reduction to generate fuels. Here, tin oxide crossed architectures (SnO) and petal-like Sn3O4 semiconductors were synthesized using the microwave-assisted hydrothermal method. The synthesized materials were applied in electrochemical reduction of CO2 and promoted the formation of methanol, ethanol and acetone. The best condition (greatest amount of products) was obtained with - 0.5 V vs Ag/AgCl for both electrocatalysts. For the first time, acetone formation was observed using both SnO and Sn3O4 materials. The SnO electrocatalyst exhibited the best electrochemical activity for CO2 reduction, ascribed to higher charge transfer corroborated by the higher current densities and lower resistance in the Nyquist diagram. Differences in methanol concentration obtained by the samples were ascribed to the different morphology and charge transfer over the films. The results showed that Sn-based electrocatalysts can be applied to generate important products, such as methanol and ethanol, aside from promoting acetone formation. (AU)

• FAPESP's process: 17/13123-4 - Development of photoelectrocatalytic membranes based on TiO2 and Al2O3 modified and applied in the treatment of organic contaminants and microorganisms in aqueous solution
• Grantee: Alysson Stefan Martins
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/18856-5 - Photo(electro)chemical applications for the production of renewable fuels using nanocomposites based on tin oxide (SnO and Sn3O4) and carbon compounds (reduced graphene oxide and graphitic carbon nitride)
• Grantee: Fernanda da Costa Romeiro
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
• Grantee: Maria Valnice Boldrin
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 16/18057-7 - CO2 reduction aiming to generate value-added compounds by photocatalysis/photoelectrocatalysis using ionic liquid in a pressurized reactor
• Grantee: João Angelo de Lima Perini
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/26219-0 - Study of Single Element Chemical Sensor Devices based on Semiconducting Metal Oxide Materials
• Grantee: Marcelo Ornaghi Orlandi
• Support Opportunities: Regular Research Grants