Electrocatalytic Reduction of CO2 to Methanol by Iron Tetradentate Phosphine Complex Through Amidation Strategy

被引:32
作者
Bi, Jiaojiao [1 ,3 ]
Ho, Pengfei [1 ,3 ]
Liu, Fang-Wei [1 ,3 ]
Kang, Peng [1 ,2 ,3 ]
机构
[1] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, 29 Zhongguancun East Rd, Beijing 100190, Peoples R China
[2] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300350, Peoples R China
[3] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
关键词
amidation; carbon dioxide; electrocatalysis; iron; methanol; CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; CATALYTIC-HYDROGENATION; HOMOGENEOUS CATALYSIS; ALKYL FORMATES; BICARBONATES; DIHYDRIDE; CAPTURE; RHODIUM; AMINE;
D O I
10.1002/cssc.201802929
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The iron complex of tetradentate tris[2-(diphenylphosphino) ethyl]phosphine (PP3), [Fe(PP3)(MeCN)(2)](BF4)(2), was able to electrocatalytically reduce CO2 to formate with a Faradaic efficiency (FE) of approximately 97.3% in acetonitrile. Upon addition of diethylamine as a cocatalyst, electrocatalytic reduction to methanol was achieved with an FE of 68.5%, and other products were formamide and formate. A mechanistic study suggested that the [FeH(PP3)](BF4) hydride complex was the active species in the electrocatalysis. Added amine as cocatalyst could react with CO2 to form carbamate, which could then be reduced to formamide and further to methanol. By contrast, free CO2 could only be reduced to formate as the end-product.
引用
收藏
页码:2195 / 2201
页数:7
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