Alkali metal cation effects on electrocatalytic CO2 reduction with iron porphyrins

被引：43

作者：

Guo, Kai ^{[1
]}

Lei, Haitao ^{[1
]}

Li, Xialiang ^{[1
]}

Zhang, Zongyao ^{[2
]}

Wang, Yabo ^{[1
]}

Guo, Hongbo ^{[1
]}

Zhang, Wei ^{[1
]}

Cao, Rui ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Appl Surface & Colloid Chem, Xian 710119, Shaanxi, Peoples R China

[2] Univ Oxford, Dept Chem, Chem Res Lab, Oxford OX1 3TA, England

来源：

CHINESE JOURNAL OF CATALYSIS | 2021年 / 42卷 / 09期

基金：

中国国家自然科学基金;

关键词：

CO2; reduction; Molecular electrocatalysis; Alkali metal cation effect; Iron porphyrin; Structure-activity relationship; CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; CATALYTIC-REDUCTION; EFFICIENT; COMPLEX; SELECTIVITY; FRAMEWORKS; HYDROGEN; DESIGN; MODELS;

D O I：

10.1016/S1872-2067(20)63762-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The electrocatalytic CO2 reduction reaction (CO2RR) has attracted increasing attention in recent years. Practical electrocatalysis of CO2RR must be carried out in aqueous solutions containing electrolytes of alkali metal cations such as sodium and potassium. Although considerable efforts have been made to design efficient electrocatalysts for CO2RR and to investigate the structure-activity relationships using molecular model complexes, only a few studies have been investigated the effect of alkali metal cations on electrocatalytic CO2RR. In this study, we report the effect of alkali metal cations (Na+ and K+) on electrocatalytic CO2RR with Fe porphyrins. By running CO2RR electrocatalysis in dimethylformamide (DMF), we found that the addition of Na+ or K+ considerably improves the catalytic activity of Fe chloride tetrakis(3,4,5-trimethoxyphenyl)porphyrin (FeP). Based on this result, we synthesized an Fe porphyrin (N)18C6-FeP bearing a tethered 1-aza-18-crown-6-ether ((N)18C6) group at the second coordination sphere of the Fe site. We showed that with the tethered (N)18C6 to bind Na+ or K+, N18C6-FeP is more active than FeP for electrocatalytic CO2RR. This work demonstrates the positive effect of alkali metal cations to improve CO2RR electrocatalysis, which is valuable for the rational design of new efficient catalysts. (C) 2021, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

引用

页码：1439 / 1444

页数：6

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