CO₂ Hydrogenation to Methanol over Mesoporous SiO₂-Coated Cu-Based Catalysts

Author(s)

Vieira, Luiz H. ; Rossi, Marco A. ; Rasteiro, Leticia F. ; Assaf, Jose M. ; Assaf, Elisabete M.

• Document type: Journal article
• Source: ACS NANOSCIENCE AU; v. 4, n. 4, p. 8-pg., 2024-07-18.

Abstract

Although chemical promotion led to essential improvements in Cu-based catalysts for CO2 hydrogenation to methanol, surpassing structural limitations such as active phase aggregation under reaction conditions remains challenging. In this report, we improved the textural properties of Cu/In2O3/CeO2 and Cu/In2O3/ZrO2 catalysts by coating the nanoparticles with a mesoporous SiO2 shell. This strategy limited particle size up to 3.5 nm, increasing metal dispersion and widening the metal-metal oxide interface region. Chemometric analysis revealed that these structures could maintain high activity and selectivity in a wide range of reaction conditions, with methanol space-time yields up to 4 times higher than those of the uncoated catalysts. (AU)

• FAPESP's process: 22/06419-2 - Development of catalytic adsorbents for application in the integrated CO2 capture and conversion
• Grantee: Luiz Henrique Vieira
• Support Opportunities: Generation Project Research Grant
• FAPESP's process: 22/10615-1 - Consolidation of the biorefinery concept applied to the biological treatment of wastewater and solid wastes
• Grantee: Marcelo Zaiat
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 20/15230-5 - Research Centre for Greenhouse Gas Innovation - RCG2I
• Grantee: Julio Romano Meneghini
• Support Opportunities: Research Grants - Research Centers in Engineering Program