(438f) Synergizing CO2 Capture and Electrochemical Conversion: Tailored Oxygen Vacancies and Amine-Based Electrolytes for Enhanced CO Production

Advancing electrochemical CO₂ reduction reactions (ECO₂RR) is pivotal in the urgent task of mitigating CO₂ emissions. Catalyst development focuses on enhancing CO₂ adsorption and activation, yet strategies addressing product desorption are underexplored. Drawing from the Sabatier principle, our study aims to enhance ECO₂RR performance, achieving an impressive 85% faradaic efficiency for CO production by optimizing product desorption. Through tailored manipulation of the electronic environment, utilizing oxygen vacancies (O_vac) in Ni-doped SrTiO₃, we lowered the energy barrier for product desorption. Introducing Ni²⁺ into the SrTiO₃ lattice promotes O_vac formation, altering the local electronic landscape. This doping-segregation method provides a unique avenue for controlling active metal cluster size and oxide support properties, promising diverse chemical reaction applications. Additionally, we present a novel methodology integrating CO₂ capture and conversion, utilizing CO₂ capture media directly as the electrolyte for electrochemical CO₂ conversion, further advancing the feasibility and sustainability of CO₂ utilization technologies.