2117
High-Pressure Electrochemistry: The Electrochemical Reduction of Carbon Dioxide into Usable Fuels and Chemicals

Tuesday, 2 October 2018
Universal Ballroom (Expo Center)
A. McKee, A. Rassoolkhani, J. G. Koonce, S. Alsaedi, W. Cheng, and S. Mubeen (University of Iowa)
Currently, the United States ranks second internationally in terms of absolute carbon dioxide (CO2) emissions per year, exceeded only by China. Nearly 30% of these emissions come from coal- and natural gas-fired power plants. Carbon capture and storage (CCS) technologies can potentially reduce net CO2 emissions from power sectors; however, efforts, to date, have not been widely adopted due to high CO2 sequestration cost (over $60 per metric ton of CO2 captured). Electrochemical fixing of CO2 in stable high value marketable chemical products can potentially reduce net CO2 capture costs. Further, electrochemical systems can be powered by renewable electricity sources, thereby ensuring that no additional CO2 is produced in the process of CO2 removal. At present, all electrochemical-based carbon utilization technologies suffer from low product yield and rates, making them impractical for commercial applications. This poster will summarize our recent findings on CO2 reduction obtained from a high pressure electrochemical reactor. The motivation for using a high-pressure electrochemical reactor is to overcome two major limitations: (1) the low-current density caused by low CO2 solubility in ambient conditions; and (2) the low selectivity for CO2 reduction caused by the competing proton reduction to hydrogen. Particularly, the poster will summarize the results on CO2 reduction currents on Cu and Ag electrocatalysts as a function of CO2 partial pressure, co-solvent volume fraction, inter electrode spacing, and salt concentration.