114學年材料所-第九週 專題研討課程 演講公告 (114年11月06日)
2025.11.05
題目:
電催化二氧化碳轉化的微環境動力學
Dynamics of the Microenvironment of Electrocatalytic Carbon Dioxide Conversion
演講者 : Joel Ager
現職 : 加州大學柏克萊分校 材料科學 兼任教授
時間: 114年 11月 06日(四) 3:20~4:00 pm
地點: 鋼構區(3F)共同教室A1302演講廳
演講摘要:
Electrocatalytic CO2 reduction (EC-CO2R) could potentially replace petrochemical-based pathways for the production of fuels and chemicals, motivating interest in building materials systems which can efficiently drive the requisite chemistry. However, selectivity and stability remain as challenges, pointing to dynamics which are not well-understood or controlled. In this context, I will show experimentally that focusing on the design and characterization of isolated active sites is inadequate to describe EC-CO2R processes. First, it is now very clear that Cu electrocatalysts can have active sites which are specific for certain products, i.e. for ethylene, ethanol, and propanol. Second, the EC-CO2R environment is highly dynamic, both at the atomic level driven by adsorbate-mediated surface reconstruction and, in certain cases, at the macro-scale due to non-linear coupling of mass transfer and pressure. Third, the electrocatalytic surface can be functionally heterogeneous, with some sites functioning as intermediate reservoirs while others provide transport pathways to the active sites. Finally, I will argue that the dynamics of the chemical reaction network of EC-CO2R can have functionalities found in biological networks such as inhibition/activation, cascades, and substrate channeling/pre-concentration. For this reason, adapting experimental and simulation methods from systems biology can yield mechanistic insights and, prospectively, a predictive framework.
電催化二氧化碳轉化的微環境動力學
Dynamics of the Microenvironment of Electrocatalytic Carbon Dioxide Conversion
演講者 : Joel Ager
現職 : 加州大學柏克萊分校 材料科學 兼任教授
時間: 114年 11月 06日(四) 3:20~4:00 pm
地點: 鋼構區(3F)共同教室A1302演講廳
演講摘要:
Electrocatalytic CO2 reduction (EC-CO2R) could potentially replace petrochemical-based pathways for the production of fuels and chemicals, motivating interest in building materials systems which can efficiently drive the requisite chemistry. However, selectivity and stability remain as challenges, pointing to dynamics which are not well-understood or controlled. In this context, I will show experimentally that focusing on the design and characterization of isolated active sites is inadequate to describe EC-CO2R processes. First, it is now very clear that Cu electrocatalysts can have active sites which are specific for certain products, i.e. for ethylene, ethanol, and propanol. Second, the EC-CO2R environment is highly dynamic, both at the atomic level driven by adsorbate-mediated surface reconstruction and, in certain cases, at the macro-scale due to non-linear coupling of mass transfer and pressure. Third, the electrocatalytic surface can be functionally heterogeneous, with some sites functioning as intermediate reservoirs while others provide transport pathways to the active sites. Finally, I will argue that the dynamics of the chemical reaction network of EC-CO2R can have functionalities found in biological networks such as inhibition/activation, cascades, and substrate channeling/pre-concentration. For this reason, adapting experimental and simulation methods from systems biology can yield mechanistic insights and, prospectively, a predictive framework.