Highly Efficient Visible-Light-Driven CO2-to-CO Conversion by Coordinatively Unsaturated Co-Salen Complexes in a Water- Containing System

被引：7

作者：

Su, Chao ^{[1
]}

Chen, Zilu ^{[1
]}

Feng, Qin ^{[1
]}

Wei, Fangsha ^{[1
]}

Zhang, Mingling ^{[1
]}

Mo, Anna ^{[1
]}

Huang, Hai-Hua ^{[1
]}

Hu, Huancheng ^{[1
]}

Liu, Dongcheng ^{[1
]}

机构：

[1] Guangxi Normal Univ, Collaborat Innovat Ctr Guangxi Ethn Med, Sch Chem & Pharmaceut Sci, State Key Lab Chem & Mol Engn Med Resources, Guilin 541004, Peoples R China

来源：

INORGANIC CHEMISTRY | 2022年 / 61卷 / 49期

基金：

中国国家自然科学基金;

关键词：

METAL-ORGANIC FRAMEWORKS; COBALT COMPLEXES; ELECTROCHEMICAL REDUCTION; PHOTOCATALYTIC REDUCTION; CARBON-DIOXIDE; AQUEOUS CO2; PHOTOREDUCTION; ELECTRON; IRON; MACROCYCLES;

D O I：

10.1021/acs.inorgchem.2c02515

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The development of cost-effective catalysts for CO2 reduction is highly desired but remains a significant challenge. The unsaturated coordination metal center in a catalyst is favorable for the process of catalytic CO2 reduction. In this paper, two asymmetric salen ligands were used to synthesize two coordinatively unsaturated Co-salen complexes. The two Cosalen complexes exhibit an unsaturated coordination pattern and display high activity and CO selectivity for visible-light-driven CO2 reduction in a water containing system. The photocatalytic performance of 2 is higher than that of 1 because the reduction potential of the catalytic CoII center and the energy barrier of the catalytic transition states of 2 are lower than those of 1, with turnover numbers (TONCO), turnover frequencies (TOF), and CO selectivity values of 8640, 0.24 s-1, and 97% for 2, respectively. The photocatalytic reduction of CO2 to CO for 2 is well supported by control experiments and density functional theory (DFT) calculations.

引用

页码：19748 / 19755

页数：8

共 62 条

[1] Coupling of a new porphyrin photosensitizer and cobaloxime cocatalyst for highly efficient photocatalytic H2 evolution [J].