Electrochemical Reduction of CO2 to CO Catalyzed by a Bimetallic Palladium Complex
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- 作者：James W. Raebiger ; Jeffrey W. Turner ; Bruce C. Noll ; Calvin J. Curtis ; Alex Miedaner ; Brian Cox ; and Daniel L. DuBois
- 刊名：Organometallics
- 出版年：2006
- 出版时间：July 3, 2006
- 年：2006
- 卷：25
- 期：14
- 页码：3345 - 3351
- 全文大小：134K
- 年卷期：v.25,no.14(July 3, 2006)
- ISSN：1520-6041
文摘
The bis(triphosphine) ligand C6H4{P[CH2CH2P(C6H11)2]2}2, m-(triphos)2 (1), is synthesized by thereaction of m-bis(phosphino)benzene with 4 equiv of vinyldicyclohexylphosphine. Reaction of 1 with2 equiv of [Pd(CH3CN)4](BF4)2 results in the formation of the bimetallic complex {m-(triphos)2[Pd(CH3CN)]2}(BF4)4 (2). A structural study of 2 confirms the presence of two [Pd(triphosphine)(CH3CN)]2+ substituents at the meta positions of a benzene ring. Complex 2 catalyzes the electrochemicalreduction of CO2 to CO in acidic dimethylformamide solutions. The kinetics of this reaction have beenstudied, and the reaction is 0.5 order in catalyst and first order in CO2. This catalyst exhibits catalyticrates comparable to that of its monometallic analogues. Significantly higher turnover numbers are observedfor 2 than observed previously for monometallic, bimetallic, and dendritic complexes of this class ofcatalysts.