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Designing a Zn–Ag Catalyst Matrix and Electrolyzer System for CO2 Conversion to CO and Beyond
Advanced Materials ( IF 27.4 ) Pub Date : 2021-10-21 , DOI: 10.1002/adma.202103963
Sarah Lamaison 1, 2, 3 , David Wakerley 2 , Frauke Kracke 4 , Thomas Moore 5 , Lan Zhou 6, 7 , Dong Un Lee 2 , Lei Wang 2 , McKenzie A Hubert 2 , Jaime E Aviles Acosta 2 , John M Gregoire 6, 7 , Eric B Duoss 5 , Sarah Baker 5 , Victor A Beck 5 , Alfred M Spormann 4, 8 , Marc Fontecave 1 , Christopher Hahn 3, 5 , Thomas F Jaramillo 2, 3
Affiliation  

CO2 emissions can be transformed into high-added-value commodities through CO2 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−2 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 CO2 conversion toward sought-after products.

中文翻译:

设计用于将 CO2 转化为 CO 及其他物质的 Zn-Ag 催化剂基质和电解系统

CO 2排放可通过CO 2电催化转化为高附加值商品;然而,全球规模化需要高效的低成本电催化剂。受其他新兴技术的启发,作者报告了在低成本 Zn 基体中包含高度分散的 Ag 位点的气体扩散电极的开发。该催化剂显示出前所未有的用于 CO 生产的 Ag 质量活性: 614 mA cm -2在 0.17 毫克的银。随后的电解质工程表明,卤化物阴离子可以进一步提高 Zn-Ag 催化剂的稳定性和活性,优于纯 Ag 和 Au。构建膜电极组件并将其与将 CO 转化为乙酸盐和乙醇的微生物过程相结合。结合起来,这些概念提供了设计催化剂和系统以将 CO 2转化为广受欢迎的产品的途径。
更新日期:2021-10-21
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