학과 정기 세미나 안내

■ 제 목:  Nano-Metallurgy for CO2 Electroreduction Catalysts

■ 연 사:  남대현 교수 (DGIST 에너지공학과)                   

■  일 시:  2023년 9월 19(화) 오후 4시 

■  장 소:  응용공학동 1층 영상강의실 

■ Host :  강지형 교수 

Electrochemical CO2 Reduction reaction (CO2RR), which converts CO2 into value-added fuels and chemical feedstocks, has received great attention for carbon neutrality and sustainable chemical manufacturing. For selective conversion of CO2-to-multi-carbon (C2+) chemicals with high production rate, judiciously controlled Cu-based electrocatalysts, which enable *CO dimerization for C-C coupling, are essential in gas diffusion electrode. In this talk, we present 'Nano-Metallurgy', a thermodynamic nanomaterial design principle for understanding and predicting the material phenomena in the heterogeneous CO2RR catalysts (1) fabrication, and (2) reconstruction during catalytic reaction. This enables the predictive synthesis of namomaterials by providing the processing window for selective oxidation/reduction of the elemental components. Based on this fundamental, we introduce how we control the interface of metal alloys beyond miscibility limits, and diversify the structures of metal (compound)/carbon hybrid materials, for efficient electrocatalysts development; tuning the selectivity between ethylene/ethanol. Also, we elucidate how this principle can be applied to understand the catalyst reconstruction, which changes the phase and structure of metallic species during CO2RR.