Hosted by the CBE Department: Guest Lecture by Dr. Feng Jiao
Feng Jiao, PhD, is the Elvera and William R. Stuckenberg Professor in the Department ofEnergy, Environmental & Chemical Engineering at Washington University in St. Louis.
Topic: 鈥淐O2 Electrolysis Systems for Chemical Production鈥�
Thursday, October 26, 2023
2:00 鈥� 3:00 PM
Mendel Science Center Room 102
This lecture is being hosted by the Department of Chemical and Biological Engineering and is open to 棉花糖直播 Community.
Lecture Abstract:
As our society faces the pressing challenges of climate change and global warming, driven in part by increasing atmospheric CO2 levels, reducing CO2 emissions has become a critical mission in the pursuit of a sustainable future. Traditional chemical industry processes often rely on fossil fuels, which inevitably emit substantial quantities of CO2. In response, electrochemical processes have garnered interest for their potential to be more environmentally friendly and exhibit a smaller carbon footprint when powered by renewable energy sources.
Our research group is currently dedicated to the development of CO2 electrolysis devices that convert CO2 into value-added chemicals and fuels through innovative electrocatalyst design and reactor engineering. In this presentation, we will showcase our recent work on a two-step tandem CO2 electrolysis system. We have reported an internally coupled purification strategy that significantly enhances acetate concentration and purity in CO electrolysis. This approach employs an alkaline-stable anion exchange membrane with high ethanol permeability and a selective ethanol partial oxidation anode to regulate the CO reduction product stream.
We successfully demonstrated a stable 120-hour continuous operation of the CO electrolyzer at a current density of 200 mA cm-2 and a full-cell potential of less than 2.3 V, consistently producing a 1.9 M acetate product stream with a purity of 97.7%. This performance is among the best reported in the literature [1]. The ability to convert CO2 into acetate has opened up the possibility of developing an electrochemical-biological hybrid approach to produce food from CO2, offering much higher efficiency than natural photosynthetic pathways [2].
References:
- S. Overa, B. Crandall, B. Shrimant, D. Tian, B. H. Ko, H. Shin, C. Bae and F. Jiao*. Enhancing acetate selectivity by coupling anodic oxidation in carbon monoxide electroreduction. Nature Catalysis 5, 738-745 (2022). 10.1038/s41929-022-00828-w
- E. C. Hann, S. Overa, M. Harland-Dunaway, A. F. Narvaez, D. N. Le, M. L. Orozco-Cardenas, F. Jiao* and R. E. Jinkerson*. A hybrid inorganic-biological artificial photosynthesis system for energy-efficient food production. Nature Food 3, 461 (2022). 10.1038/s43016-022-00530-x
About Feng Jiao
Feng Jiao, PhD, is the Elvera and William R. Stuckenberg Professor in the Department of Energy, Environmental & Chemical Engineering at Washington University in St. Louis and the founding director of the Center for Carbon Management. He holds a BSc in Chemistry from Fudan University in China and a PhD in Chemistry from the University of St Andrews in the United Kingdom. Following the completion of his postdoctoral training at the Lawrence Berkeley National Laboratory, he joined the faculty at the University of Delaware in 2010. Then, he was promoted to full professor of Chemical and Biomolecular Engineering and served as the Director of the Center for Catalytic Science & Technology. In August 2023, Professor Jiao joined the Department of Energy, Environmental & Chemical Engineering at Washington University in St. Louis as the Elvera and William R. Stuckenberg Professor. He also serves as the founding director of the Center for Carbon Management.
The Jiao research group is dedicated to developing innovative electrochemical devices to address critical energy storage and sustainability challenges. Professor Jiao has published over 100 research papers, which have collectively received more than 17,000 citations. His contributions have been recognized with several awards and honors, including his election as a Fellow of the Royal Society of Chemistry, the receipt of the NSF CAREER Award, and recognitions as a 2020 Emerging Investigator by the Journal of Materials Chemistry A and a 2020 Scialog Fellow for the Negative Emission Science (NES) initiative.