Hetero-bimetallic paddlewheel complexes for enhanced CO₂ reduction selectivity in MOFs: a first principles study

Area of Science:

• Materials Science
• Catalysis
• Electrochemistry

Background:

• Carbon dioxide (CO2) reduction is vital for sustainable chemical production.
• Optimizing catalysts is key to efficient CO2 conversion into valuable products.
• First principles methods aid in designing catalysts with desired properties.

Purpose of the Study:

• Investigate CO2 reduction reaction (CO2RR) on bimetallic Cu-based paddlewheel complexes.
• Understand the effect of Mn, Co, or Ni substitution on catalytic activity and selectivity.
• Identify potential catalysts for efficient CO2 conversion.

Main Methods:

• Computational investigation of CO2RR using first principles methodology.
• Analysis of bimetallic Cu-based paddlewheel complexes with Mn, Co, and Ni substitutions.
• Evaluation of catalytic activity, product selectivity, and reaction kinetics.

Main Results:

• Mn substitution enhances catalytic activity, favoring formic acid and methane production with suppressed C2 products, significantly lowering the limiting potential.
• Co substitution leads to selective methane production, but faces competition from hydrogen evolution.
• Cu-Ni complexes show dual activity, with Ni favoring methane and Cu favoring methanol, both producing formic acid.

Conclusions:

• Metal substitution in Cu-based paddlewheel complexes offers tunable CO2RR pathways.
• Mn, Co, and Ni substituents demonstrate distinct catalytic behaviors and energy efficiencies.
• Findings guide the development of novel, high-performance catalysts for CO2 reduction.