A molecular noble metal-free system for efficient visible light-driven reduction of CO2 to CO

被引：42

作者：

Chen, Lingjing ^{[1
]}

Qin, Yanfei ^{[1
]}

Chen, Gui ^{[1
]}

Li, Mingya ^{[1
]}

Cai, Lirong ^{[1
]}

Qiu, Yongfu ^{[1
]}

Fan, Hongbo ^{[1
]}

Robert, Marc ^{[2
]}

Lau, Tai-Chu ^{[3
]}

机构：

[1] Dongguan Univ Technol, Sch Environm & Civil Engn, Dongguan 523808, Guangdong, Peoples R China

[2] Univ Paris Diderot, Sorbonne Paris Cite, CNRS, Lab Electrochim Mol,UMR 7591, 15 Rue Jean Antoine Baif, F-75205 Paris 13, France

[3] City Univ Hong Kong, Dept Chem, Tat Chee Ave, Hong Kong, Peoples R China

来源：

DALTON TRANSACTIONS | 2019年 / 48卷 / 26期

基金：

中国国家自然科学基金;

关键词：

SELECTIVE PHOTOCHEMICAL REDUCTION; CARBON-DIOXIDE REDUCTION; PHOTOCATALYTIC REDUCTION; CO2-TO-CO CONVERSION; HIGHLY EFFICIENT; CATALYST; IRON; COMPLEX; WATER; MECHANISMS;

D O I：

10.1039/c9dt00425d

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new pentadentate quinoline-pyridine ligand and its iron (1), cobalt (2) and nickel (3) complexes have been synthesized and characterized. The iron complex exhibits excellent photocatalytic activity towards CO2-to-CO conversion with a TON(CO) of 544 and a selectivity of 99.3% using the commercially available organic dye purpurin as the photosensitiser and BIH as the electron donor. In contrast, the cobalt and nickel complexes result in very low activity for CO production with a TON of only 8 and 15, respectively. On the other hand, all the three complexes show good electrocatalytic activity for CO2 reduction when using 2,2,2-trifluoroethanol as the proton source with the active intermediate of M-0 species. The lack of activity in photocatalytic CO2 reduction by 2 and 3 can be attributed to the redox potential of M-I/M-0 which is significantly more negative than that of PP-/PP2- while in the case of 1 the Fe-I/Fe-0 redox potential becomes more positive than that of the PP-/PP2- couple.

引用

页码：9596 / 9602

页数：7

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