PDF Publication Title:
Text from PDF Page: 032
32 Chapter 5. Electrochemical Studies of Non-Aqueous-based CO2 Reduction Electrodes Electrolyte solvent Electrolyte salt Major product Gas evolution details Graphite (foil) BTMA-TFSI/MeCN Li2CO3 Trace H2 Activated carbon (foil) BTMA-TFSI/MeCN Li2CO3 Trace H2 Activated carbon (film) BTMA-TFSI/MeCN Li2CO3 Trace H2 LTO BTMA-TFSI/MeCN Li2CO3 H2 1 × 10-6 mol hr-1 (H2) Pt/C BTMA-TFSI Li2CO3 Trace O2 <1 × 10-7 mol hr-1 (O2), 50% pO2 increase Pt/C BTMA-TFSI Cs2CO3 Trace O2 <1 × 10-7 mol hr-1 (O2), 10% pO2 increase <1 × 10-7 mol hr-1 Pt/C DEMA-OTf Li2CO3 CO2, trace O2 (CO2), 2% pO2 increase <1 × 10-7 mol hr-1 Pt/C DEMA-OTf Cs2CO3 CO2, trace O2 (CO2), 1% pO2 increase Pt/C Choline-TFSI/DMA Li2CO3 H2, CO2 1 × 10-7 mol hr-1 (H2, CO2 ) Pt/C DMA Li2O2 O2 1 × 10-6 mol hr-1 (O2), 2500% pO2 increase Table 5.2: Summary of O2 evolution tests under Ar at 303 K. Electrolytes contained 0.1 M salt. Cells were electrolyzed for a number of hours at current density 0.03 mA/cm2. 5.5 Significance of Results (i) Electrocatalytic reduction of CO2 can be effected through homogeneous catalysis at temperatures as low as –20◦C under 1 atm CO2, with good FEs. Experimental current densities are low at present (3 orders of magnitude below those achievable in high temperature SOXE processes, making direct estimates of rates of eventual CO2 production capability meaningless at this stage; Hecht, 2016) but these should be improved significantly in future work through modification of electrode, electrolyte, and catalyst composition, as well as improvements in cell design. This will enable the potential operational energy savings possible through low-temperature electrocatalytic ISRU to be evaluated in a more properly-optimized cell setup. (ii) O2 evolution from CO32- ion in ionic liquid media is slow and inefficient, so future designs for full electrocatalytic ISRU cells should investigate alternative anode reactions and charge carriers. Hence, further studies of low-temperature alternatives to SOXE ISRU processes for O2 and fuel generation on Mars are warranted based on the proof-of-concept CO2 reduction experiments described herein.PDF Image | ISRU Challenge Production of O2 and Fuel from CO2
PDF Search Title:
ISRU Challenge Production of O2 and Fuel from CO2Original File Name Searched:
ISRU_final_report.pdfDIY PDF Search: Google It | Yahoo | Bing
Salgenx Redox Flow Battery Technology: Power up your energy storage game with Salgenx Salt Water Battery. With its advanced technology, the flow battery provides reliable, scalable, and sustainable energy storage for utility-scale projects. Upgrade to a Salgenx flow battery today and take control of your energy future.
CONTACT TEL: 608-238-6001 Email: greg@salgenx.com (Standard Web Page)