Highly porous CuZnAl layered double hydroxides prepared by biochar-templated co-precipitation method as catalysts for the preferential oxidation of CO reaction

Author(s)

Lima Goncalves, Rosembergue Gabriel ; Petrolini, Davi Domingos ; Firmino Marcos, Francielle Candian ; Assaf, Jose Mansur ; Assaf, Elisabete Moreira

• Document type: Journal article
• Source: APPLIED CLAY SCIENCE; v. 232, p. 8-pg., 2023-02-01.

Abstract

This study evaluates the effect of the porosity of Layered Double Hydroxide (LDH) containing copper (Cu), zinc (Zn), and aluminum (Al) synthesized by a co-precipitation method with biochar as a hard template on the preferential oxidation of CO (CO-PROX) reaction. Experimental data showed biochar as a hard template pro-moted structural changes in the LDH, such as 9 to 42 nm increase in pore size, decrease in the copper oxide crystallite size, and increase in metallic area, and enhanced its activity in the CO-PROX reaction. In situ DRIFTS analyses revealed CO was adsorbed on both Cu+ and Cu0 sites and Cu+ was the main species during the reaction for all catalysts. (AU)

• FAPESP's process: 17/08293-8 - Project 14: direct synthesis of methanol from CO2
• Grantee: Francielle Candian Firmino Marcos
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/10980-9 - Oxidative Coupling of Methane using A2B2O7 catalysts
• Grantee: Davi Domingos Petrolini
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• 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