Designing a Zn-Ag Catalyst Matrix and Electrolyzer System for CO<sub>2</sub> Conversion to CO and Beyond.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 34672402.
- Also identified by DOI 10.1002/adma.202103963.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
CO<sub>2</sub> emissions can be transformed into high-added-value commodities through CO<sub>2</sub> electrocatalysis; however, efficient low-cost electrocatalysts are needed for global scale-up. Inspired by other emerging technologies, the authors report the development of a gas diffusion electrode containing highly dispersed Ag sites in a low-cost Zn matrix. This catalyst shows unprecedented Ag mass activity for CO production: -614 mA cm<sup>-2</sup> at 0.17 mg of Ag. Subsequent electrolyte engineering demonstrates that halide anions can further improve stability and activity of the Zn-Ag catalyst, outperforming pure Ag and Au. Membrane electrode assemblies are constructed and coupled to a microbial process that converts the CO to acetate and ethanol. Combined, these concepts present pathways to design catalysts and systems for CO<sub>2</sub> conversion toward sought-after products.