Electrochemical capture of carbon dioxide by substituted quinoxaline-5,8-diones

被引：0

作者：

Pizarro, Sebastian ^{[1
]}

Angel, Constanza ^{[1
]}

Canas-Sarazua, Raul ^{[1
]}

Delgadillo, Alvaro ^{[1
]}

机构：

[1] Univ Serena, Fac Ciencias, Dept Quim, Casilla 599,Benavente 980, La Serena, Chile

来源：

CHEMICAL PHYSICS LETTERS | 2025年 / 862卷

关键词：

CO; 2; capture; Electrocatalysis; Quinoxalines; CO2; REDUCTION;

D O I：

10.1016/j.cplett.2025.141869

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study investigates the electrochemical properties of a family of substituted quinoxaline-5,8-diones, in particular 2,3-diphenylquinoxaline-5,8-dione (phenylQX), 2,3-bis(4-methoxyphenyl)quinoxaline-5,8-dione (methoxyQX), and dimethyl 4,4 '-(5,8-dioxo-5,8-dihydroquinoxaline-2,3-diyl)dibenzoate (benzoateQX) and their evaluation as redox carriers in CO2 capture processes, as they are capable of forming reversible adducts with CO2. The capacities of phenylQX, methoxyQX, and benzoateQX were determined by adduct formation constant, finding a log K of 11.4 for phenylQX; 9.3 for methoxyQX and 3.4 for benzoateQX. These results were contrasted with theoretical DFT calculations, which showed that these quinoxalines bind strongly to two CO2 molecules.

引用

页数：6

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