Evaluating the efficacy of nanosized CuZnAl and CuZnZr mixed oxides for electrocatalytic CO2 reduction

The increased awareness of carbon management has prompted the scientific community towards delivering sustainable catalytic technologies, preferably from CO2. Copper-based multifunctional catalysts are the most frequently used for thermal hydrogenation and electrocatalytic reduction of CO2 (CO2R) processes. To improve the understanding and efficacy of these materials for the CO2R reaction, Cu-Zn oxides combined with Al2O3 and ZrO2 were synthesized by the coprecipitation method and annealed at 500 degrees C, 600 degrees C, and 700 degrees C (i.e., Cu/ZnO/Al2O3-x and Cu/ZnO/ZrO2 systems-x, where x is the annealing temperature) to tune their multi-functionality. We demonstrate that the composition of Cu-Zn oxides and pretreatment temperature impact the electrocatalytic CO2R performance, where CuZnZr-600 and CuZnAl-700 materials are superior. Different characterization tools were employed to rationalize the results described in this work, which could provide a way to design an efficient catalytic system for the CO2R process.

Automated summary

The increased awareness of carbon management has driven the scientific community to develop sustainable catalytic technologies for CO2 conversion. Copper-based multifunctional catalysts are commonly used for thermal hydrogenation and electrocatalytic reduction of CO2. This study synthesized Cu-Zn oxides combined with Al2O3 and ZrO2 through coprecipitation and annealing at different temperatures, revealing that the composition and pretreatment temperature of Cu-Zn oxides significantly affect electrocatalytic CO2 reduction performance. The findings provide insights for designing an efficient catalytic system for CO2 conversion.