https://scholar.dgist.ac.kr/handle/20.500.11750/17549 Sun, 05 Apr 2026 13:23:40 GMT 2026-04-05T13:23:40Z https://scholar.dgist.ac.kr/handle/20.500.11750/57882 Title: Engineering Microenvironments for Photo-Electrochemical Reduction of Carbon Dioxide Author(s): Kim, Chanyeon; Bell, Alexis T. Abstract: Due to the escalating crisis of global warming, carbon dioxide (CO2) conversion has garnered significant attention as a pivotal technology for sustainable energy and chemical processes. However, the challenge lies in its nature as a strong endothermic reaction with substantial activation energy, thus requiring extensive energy input. Therefore, integration with renewable energy sources becomes imperative. In this regard, Photo- and electrochemical CO2 reduction (CO2R) presents promising avenues for converting CO2 with water (H2O) using electricity derived from renewable sources, thereby producing various chemicals and fuels. However, the abundance of H2O in the catalytic microenvironment promotes the competing evolution of hydrogen (H2), leading to diminished energy efficiency and selectivity toward CO2R products. Additionally, another challenge is to selectively produce valuable multicarbon products (C2+ products), including C2H4, C2H5OH, and C3H7OH, which hold higher market value and greater market volume compared to single-carbon products (C1 products) like HCOOH, CO, and CH4. Among various CO2R catalysts, Copper (Cu)-based materials have emerged as prominent candidates due to their capability to yield C2+ products with considerable activity and selectivity. Recent studies suggest that catalytic microenvironments significantly influence C2+ production on Cu-based catalysts. Hence, this presentation aims to elucidate the impact of these microenvironments near Cu catalysts and explore how this knowledge can be effectively applied to design a photocathode for the photo-electrochemical reduction of CO2, thereby enhancing the production of C2+ products. Wed, 09 Oct 2024 15:00:00 GMT https://scholar.dgist.ac.kr/handle/20.500.11750/57882 2024-10-09T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/56756 Title: Engineering of Microenvironments Near Copper Catalyst during Electrochemical Carbon Dioxide Reduction Using Ionomer Author(s): 김찬연 Abstract: Electrochemical carbon dioxide reduction (CO2R) can provide a sustainable pathway towards various chemicals and fuels when it is powered by renewable energy sources. In this reaction, an evolution of hydrogen which is competing reaction during CO2R should be minimized. Another challenge is to maximize multicarbon products (C2+ products) over products containing only one carbon atom (C1 products), because C2+ products have higher economic values than C1 products and they can be readily used as raw materials for conventional thermo-catalytic processes as well. Among various catalysts for CO2R, Copper (Cu)-based materials are the only known catalytic materials for CO2R with high activity and selectivity toward C2+products which are strong function of microenvironments near the catalyst. In this regard, the impact of microenvironments near Cu catalyst will be discussed and how to engineer them with coatings of ionomers which are ion conductive polymers will be introduced. Thu, 06 Apr 2023 15:00:00 GMT https://scholar.dgist.ac.kr/handle/20.500.11750/56756 2023-04-06T15:00:00Z