Selective Production of Acetone in the Electrochemical Reduction of CO2 Catalyzed by a Ru-Naphthyridine Complex

Abstract

The controlled potential electrolysis of [Ru(bpy)(napy) (CO) ](BF ) (1; bpy=2,2'-bipyridine, napy=1,8-naphthyridine) in the presence of LiBF in CO -saturated DMSO at -1.65 V (vs. Ag/Ag ) produced CO and Li CO [Eq. (a)], while similar electrolysis in the presence of (CH ) NBF resulted in formation of acetone together with (CH ) N and {(CH ) N} CO [Eq. (b)]. This represents the first almost selective generation of acetone upon electrochemical reduction of CO . The selectivity is ascribed to depression of reductive cleavage of the Ru-CO bond of 1 due to an attack of the nonbonded nitrogen atom of napy at the carbonyl carbon atom.

Reduction of CO2 under high pressure and high temperature on Pb-granule electrodes in a fixed-bed reactor in aqueous medium

“…For the reduction of CO 2 , most of the metals in the periodic table of the elements [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and synthetic metals (conducting polymers) such as polyaniline and polypyrrole [19][20][21][22][23][24] have been used as electrode material in different electrolytes and in various electrochemical cells. Most of the cited works here have been done in H-cells with metal plate electrodes.…”

Role of X-Ray Crystallography in Structural Studies of Pyridyl-Ruthenium Complexes

“…The distinction observed in solid state can be explained on the basis of a possible weak interaction between the noncoordinating nitrogen atom and the adjacent carbonyl carbon in [Ru(4)(CO) 2 Cl 2 ] rather than a different bulkiness between the CH in phenyl ring of 3 and the N in pyridyl ring of 4, because the interatomic distance between the N atom and the adjacent C atom in [Ru(4)(CO) 2 Cl 2 ] is fairly short (2.682(3) Å). This weak interaction has often been observed in ruthenium carbonyl complexes with noncoordinating pyridyl moieties (Mizukawa et al, 1999;, which contain both a pyridyl nitrogen (δ-) and a carbonyl carbon (δ+). The X-ray structures of terpyridyl complexes with the dimethoxyphenyl pendant have been determined.…”

Electrocatalytic reduction of CO2 to CO by Gd(III) and Dy(III) complexes; and M2O3 nanoparticles (M = Gd and Dy)

“…This growing research effort is a response by physical scientists and engineers to the increasing amount of CO 2 in the atmosphere and the steady growth in global fuel (energy) demand [6,7]. Electroreduction of CO 2 with metal complexes is a feasible technique for the utilization of CO 2 as a C 1 source, though the final products usually have been limited to CO and/or HCOOH [8][9][10][11][12][13][14][15][16]. Metal complexes with CO 2 as a ligand are considered to play the key role in the electroreduction and photoreduction of CO 2 , since the MÀ Àh 1 À ÀCO 2 bond is easily converted to metal-CO bond through an acid-base reaction in protic media (such as water and alcohols) or through an oxide-transfer to a free CO 2 molecule (uncoordinated CO 2 ) in aprotic media (such as CH 3 CN).…”