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- W3172649863 abstract "The electrocatalytic reduction of CO2 (CO2R) into hydrocarbon fuels, such as ethylene and ethanol, provides an attractive pathway towards closing the industrial carbon cycle and producing chemicals using renewable electricity. Existing CO2R technologies can exhibit C2+ product selectivity above 74% and operating current densities over 1.3 A/cm2, but none can achieve both simultaneously, limiting the commercial viability and scalability of this technology. Low CO2 concentrations at the catalyst surface and competing side reactions such as the hydrogen evolution reaction (HER) inhibit C2+ faradaic efficiencies and operational current densities. Additionally, the use of high surface area cathode geometries to increase operational current densities is under-investigated. In this work, we electrodeposit a macroporous copper dendrite film to form high surface area cathodes. These structures are then coated with a combination of hydrophobic/hydrophilic ionomers to achieve high electrochemically active surface areas (ECSA), form regions of intrinsic porosity, and maximize catalytic availability of CO2. Using these techniques, we hope to maximize C2+ faradaic efficiencies (FE) and geometric partial current densities. The treated cathode compound macrostructure (~10μm-sized pores, and ~μm-long dendrites) and concomitant surface area allows increased geometric current densities while the ionomer coating simultaneously inhibits HER and increases hydrogen availability to improve C2+ selectivity. Our results show that careful engineering of the catalyst-electrolyte interface can enhance CO2 reduction product selectivity and efficiency." @default.
- W3172649863 created "2021-06-22" @default.
- W3172649863 creator A5057134484 @default.
- W3172649863 date "2021-05-19" @default.
- W3172649863 modified "2023-09-27" @default.
- W3172649863 title "Copper Dendrites and Surface Engineering for Enhanced CO2 Reduction Research Report Paper" @default.
- W3172649863 doi "https://doi.org/10.2172/1784613" @default.
- W3172649863 hasPublicationYear "2021" @default.
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