articleNature CommunicationsJul 20, 2020GOLD OA

Electrochemical CO2 reduction to high-concentration pure formic acid solutions in an all-solid-state reactor

State Key Laboratory of Chemical Engineering · Rice University · +2 more institutions

PubMed
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Abstract

Abstract Electrochemical CO 2 reduction reaction (CO 2 RR) to liquid fuels is currently challenged by low product concentrations, as well as their mixture with traditional liquid electrolytes, such as KHCO 3 solution. Here we report an all-solid-state electrochemical CO 2 RR system for continuous generation of high-purity and high-concentration formic acid vapors and solutions. 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 generated formic acid can be efficiently removed in the form of vapors via inert gas stream flowing through the PSE layer. Coupling with a high activity…

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