Journal
ACS ENERGY LETTERS
Volume 3, Issue 4, Pages 855-860Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.8b00164
Keywords
-
Categories
Funding
- Office of Science of the U.S. Department of Energy [DE-SC0004993]
Ask authors/readers for more resources
Gas diffusion electrodes (GDEs) with high electrochemically active surface areas (ECSAs) and triple-phase boundaries for efficient gas, electron, and ion transport offer a unique opportunity for high-rate electrochemical CO reduction (COR) in relative to traditional aqueous configurations. Cu-nanoparticle-based GDEs were fabricated by applying a mixture of carbon powders, copper acetate aqueous solution, and Teflon onto a Cu gauze substrate. The catalyst-coated substrate was air-dried, mechanically pressed, and subsequently annealed under forming gas to produce GDEs. Two distinctive types of GDE configurations, a flow-through configuration and a flow-by configuration, were constructed, characterized, and tested to quantitatively evaluate the effects of reactant gas transport on the activity and the selectivity of the GDE materials for COR. In the flow-through configuration, a high partial current density of 50.8 mA cm(-2) for COR to C2H4 was achieved at -0.85 V vs RHE in 10 M KOH at -15 degrees C, while in the flow-by configuration with the same catalyst materials the partial current density for C2H4 generation was limited to <1 mA cm(-2).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available