Effect of gas diffusion electrode composition to CO2 reduction

              Researchers in Canada study the link between electrode composition and CO2 reduction and publish their findings in the Royal Society of Chemistry’s Journal of Materials Chemistry A. In the past it has proved challenging to achieve reproducible electrochemical performance in electrolyzer flow cells. In order, to serve as pilot scale reactors especially for scaling CO2 electrolysis it is hence important to attain the required understanding, repeatability, and reliability with the associated cell components.

              This work in particular focuses on gas diffusion electrodes (GDEs) which mediate the transport of reagents, products, and electrons in electrochemical reactors designed to reduce CO2 into fuels or chemicals.  It negates the assumption that the ratio of ionomer to electrocatalyst in the precursor catalyst ink typically does not change after being deposited on the GDE. Additionally, small changes in electrode leads to unexpected results in the product. For example, it was found that the faradaic efficiency for formate, which is considered to be inconsequential relative to CO when using Ag electrocatalysts, can be modulated by 20% by a mere 5 wt% change in GDE Nafion® content.

              More importantly, the study also discusses automated protocols and strategies for maintaining a uniform ionomer–catalyst composition across the entire GDE.

Note, that Dioxide Materials Sustainion® membranes and ionomers are used in this study to achieve reliable and consistent results. You can order Sustainion® and other state of the art technologies on our webstore.