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This study introduces a tunable catalytic platform to link active site structure and microenvironment engineering. Findings reveal how porosity influences catalytic selectivity in CO2 reduction, optimizing reactivity through a balance of effects.

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Area of Science:

  • Catalysis
  • Materials Science
  • Electrochemistry

Background:

  • Tuning catalytic performance requires tailoring active sites and microenvironments.
  • A gap exists in design principles connecting these two aspects.

Purpose of the Study:

  • To develop a platform linking active site structure and microenvironment engineering.
  • To investigate how tunable porosity affects catalytic behavior.

Main Methods:

  • Synthesis of cubic copper (Cu) nanocrystals with tunable porous alumina coatings.
  • Electrochemical carbon dioxide (CO2) reduction reaction studies.
  • Analysis of catalytic selectivity shifts.

Main Results:

  • Varying porosity modulates geometric and electronic effects.
  • Increasing porosity enhances the electronic effect over the geometric effect.
  • Optimized reactivity achieved through a balance of geometric and electronic effects.

Conclusions:

  • The catalytic platform demonstrates that electronic effects are more sensitive to microenvironment changes.
  • This work provides fundamental insights for linking active site nature and microenvironment engineering in catalysis.