Photocatalytic CO<sub>2</sub> Reduction Using an Iron–Bipyridyl Complex Supported by Two Phosphines for Improving Catalyst Durability
Taku Wakabayashi, Kenji Kamada, Keita Sekizawa, Shunsuke Sato, Takeshi Morikawa, Jieun Jung, Susumu Saito
Abstract
We herein report that an iron (Fe) complex bearing a tetradentate PNNP ligand catalyzes photochemical carbon dioxide (CO2) reduction to produce mainly carbon monoxide (CO) together with formic acid (HCO2H) combined with a photosensitizer. The structurally bulky phosphine moieties stabilized the catalyst and improved its durability over a few days (∼72 h) to give the turnover number (TON) of 397. Operando subnanosecond laser-induced transient absorption measurements allowed us to observe the direct electron transfer from a reduced photosensitizer to the Fe catalyst.
Topics & Concepts
ChemistryCatalysisPhotosensitizerPhotocatalysisFormic acidPhotochemistryCarbon monoxidePhosphineDurabilityTurnover numberLigand (biochemistry)Electrochemical reduction of carbon dioxideMethanolCarbon dioxideInorganic chemistryOrganic chemistryReceptorBiochemistryComputer scienceDatabaseCO2 Reduction Techniques and CatalystsCarbon dioxide utilization in catalysisFluorine in Organic Chemistry