期刊
ACS ENERGY LETTERS
卷 5, 期 6, 页码 1825-1833出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.0c00860
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资金
- U.S. Department of Energy (DOE) [DE-AC36-08GO28308]
- Laboratory Directed Research and Development (LDRD) Program at NREL
- Argonne National Laboratory, a U.S. Department of Energy Office of Science Laboratory [DE-AC02-06CH11357]
- DOE Office of Science [DE-AC02-06CH11357]
- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Fuel Cell Technologies Office (FCTO)
This work demonstrated a robust, scalable cell architecture for electroreduction of CO2 (CO2R). An up to 90% faradaic efficiency for the conversion of CO2R to formate at 500 mA/cm(2) was realized at a 25 cm(2) gas diffusion electrode (GDE) with a carbon-supported SnO2 electrocatalyst. A 1.27 mm thick catholyte was used between the bipolar membrane and cathode GDE, which could be further reduced to tens of micrometers upon refinement. The deconvolution of the potential drop from each individual component/process guides the pathways to higher energy efficiencies of CO2R at this platform. Significant changes in the agglomerate size and aspect ratio on the electrode before and after an 11 h test were revealed by nano-CT, suggesting reduced CO2 accessibility from electrode degradation. The versatility of this CO2R testing platform enables the ability to assess materials, components, and interactions at scales more in line with future devices.
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