Large Scale Electrochemical CO2 Conversions
Let’s talk about scaling up towards large scale electrochemical CO2 conversions. The electrochemical CO2RR produces valuable fuels and feedstocks powered by renewable electricity, allowing for a pathway to close the carbon cycle and to restore renewable energy. The reaction rate, selectivity, and stability of the reaction are not only determined by properties of electrocatalysts, but also largely influenced by reactor designs and their underlying individual components.
A recent review article entitled “Reactor design for electrochemical CO2 conversion towards large scale applications” gives an excellent overview of this topic. It discusses the configurations and operating principles of widely used electrolysers and summarise advantages and disadvantages of each. It discusses in detail recent progress of the membrane electrode assembly (MEA) electrolyser, which is believed to be promising for commercialisation of the CO2RR. This work also talks about the importance of Dioxide Materials Sustainion Membrane and Ionomer as part of the MEA structure. It is essential in mediating the flow of anions (e.g., OH–, CO32-) from the cathode to the anode. Even for CO2RR to C2+ products, the membrane is critical for promoting high selectivity by generating a high pH locally at the catalyst to decrease the onset of CO production, and thus facilitating C-C coupling. Examples of breakthrough studies using the Sustainion AEM are illustrated below.
Dioxide Material not only provides membranes and other individual MEA components but also complete electrochemical cells of various sizes which can enable researches to conduct large scale electrochemical CO2 conversions.
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