Nature Research Uses Sustainion® to Convert CO2 to 100% Formic Acid

A Nature publication reports production of nearly 100% pure formic acid from electrochemically reduced CO2 in a solid-state reactor using Sustainion® Anion Exchange Membranes.

A group of researchers from Rice and collaborating universities published the paper titled “Electrochemical CO2 reduction to high concentration pure formic acid solutions in an all-solid-state reactor” in the Nature Communications citing impressive results.

Electrochemical reduction of CO2 to Pure Formic Acid

The cathode and anode were separated by a porous solid electrolyte (PSE) layer, where electrochemically generated formate and proton were recombined to form molecular formic acid. The role of the Sustainion® Anion Membrane is illustrated by the diagram below.

Water consumption and generation in the AEM
Schematic illustration of water consumption and generation in the AEM

These impressive results are summarized with a high activity (formate partial current densities ~450 mA cm−2), selectivity (maximal Faradaic efficiency ~97%), and stability (100 hours) due to a grain boundary-enriched bismuth catalyst.

Moreover, Dioxide Materials has also published works on high efficiency electrochemical formic acid generation. Our recent review journal article shows even better long-term stability of over 500 hrs using Sustainion membranes and ionomers.

Sustainion® Anion Exchange Membranes have helped researchers achieve extraordinary results and have shown superior performance than other commercial anion exchange membranes.

You can purchase Sustainion® membranes and our complete range of products on our webstore.