Efficient photocatalytic CO2 reduction using [Re(bpy) (CO)3{P(OEt)3}]+

Effect of Substituent Groups in Rhenium Bipyridine Complexes on Photocatalytic CO2 Reduction

“…All solvents were of high purity and used as received from Kanto Chemical Co. Rhenium pentacarbonyl chloride (Re(CO) 5 Cl) and 2,2′-bipyridine (bpy) were purchased from Aldrich Chemical Co. and Kanto Chemical Co and the bpy derivatives were purchased from Tokyo Chemical Industry Co.. All reagents were used without further purification. The Re(bpy-R) was synthesized using Re(CO) 5 Cl and bpy or bpy derivatives as precursors, according to a previous work [13].…”

“…The rhenium bipyridine complex Re(bpy)(CO) 3 Cl (bpy = 2,2′-bipyridine) has been reported to act as a photocatalyst that photochemically reduces CO 2 to CO and/or COOH in the presence of electron donors, such as triethanolamine (TEOA), under UV light irradiation [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] (Scheme 1). Many researchers have focused on increasing the reaction efficiency of the photoreduction of CO 2 to CO by substituting Cl with a certain ligand.…”

“…Many researchers have focused on increasing the reaction efficiency of the photoreduction of CO 2 to CO by substituting Cl with a certain ligand. A number of studies on Re(bpy)(CO) 3 L compounds ( L = Br [3,12], OClO 3 [3], PPh 3 [4], {P(OEt) 3 } [5], 4-Xpy(Xpy = pyridine derivatives) [6], and SCN [12] ) have demonstrated that longer lifetime of the triplet state of a metal to ligand charge transfer ( 3 MLCT) excited state enhances the rate constant for the formation of one-electron reduced intermediates, which enhances reaction efficiency. We have reported Re(bathophenanthroline)(CO) 3 Cl (Re(btp)) as a CO 2 reduction photocatalyst with six times higher efficiency than that of Re(bpy)(CO) 3 Cl [20].…”

Catalysis Research of Relevance to Carbon Management: Progress, Challenges, and Opportunities

“…In the most efficient systems, the total quantum yield for all reduced products reaches 40%. 177 In some cases with Ru or Os colloids, CH 4 is produced with a low quantum yield. 164 Under photochemical conditions, the turnover number and the turnover frequency are dependent on irradiation wavelength, light intensity, irradiation time, and catalyst concentration, and they have not been optimized in most of the photochemical experiments described.…”

Highly efficient photochemical HCOOH production from CO2 and water using an inorganic system

“…There have been a lot of attempts to realize similar reactions to natural photosynthesis using mainly organic complexes. Carbon monoxide (CO) [1][2][3][4] and formic acid (HCOOH) 5 have been successfully produced from CO 2 by light illumination. Research interest has recently extended to certain types of hybrid materials, [6][7][8][9] and reactor systems have been been reconsidered in connection with the shape of cataysts.…”