Step-Associated Cu-Ceria Interfaces Enhance Catalytic Activity and Selectivity

Area of Science:

• Materials Science
• Catalysis
• Surface Chemistry

Background:

• Precise control of metal-support interactions is crucial for optimizing catalytic processes.
• The surface location and interfacial environment of metal nanoparticles (NPs) on oxide supports significantly impact catalytic performance.

Purpose of the Study:

• To investigate how distinct interfacial environments of copper nanoparticles (Cu NPs) on cerium oxide (CeO2) supports influence catalytic performance in CO2 hydrogenation.
• To provide mechanistic insights into the role of NP anchoring environments in catalytic activity and selectivity.

Main Methods:

• Utilized atom-trapped Cu catalysts as precursors for controlled NP formation.
• Prepared Cu NPs with distinct Cu-CeO2 interfacial environments.
• Employed theoretical calculations to analyze reaction pathways and thermodynamic favorability.

Main Results:

• Catalysts with distinct Cu-CeO2 interfacial environments exhibited enhanced CO2 hydrogenation toward methanol formation.
• The enhanced reactivity was attributed to the promotion of formate activation within these specific interfacial environments.
• Theoretical calculations confirmed that these Cu-CeO2 interfacial environments make the methanol formation pathway thermodynamically more favorable.

Conclusions:

• The surface location and interfacial environment of metal nanoparticles on oxide supports strongly influence catalytic activity and selectivity.
• Distinct Cu-CeO2 interfacial environments provide a rational design strategy for developing highly efficient oxide-supported metal catalysts for CO2 hydrogenation.
• Understanding NP anchoring environments offers mechanistic insights for steering catalytic processes.