Metal-doped nitrogenated carbon as an efficient catalyst for direct CO 2 electroreduction to CO and hydrocarbons. Highly selective and active CO 2 reduction electrocatalysts based on cobalt phthalocyanine/carbon nanotube hybrid structures. Activity descriptors for CO 2 electroreduction to methane on transition-metal catalysts.
How copper catalyzes the electroreduction of carbon dioxide into hydrocarbon fuels. A., Abild-Pedersen, F., Studt, F., Rossmeisl, J. in Modern Aspects of Electrochemistry Vol. Electrocatalytic process of CO selectivity in electrochemical reduction of CO 2 at metal electrodes in aqueous media. Homogeneously catalyzed electroreduction of carbon dioxide-methods, mechanisms, and catalysts. Electrification and decarbonization of the chemical industry. Catalysis of the electrochemical reduction of carbon dioxide. The improved molecule-based electrocatalyst converts CO 2 to methanol with considerable activity and selectivity and with stable performance over at least 12 hours.Ĭostentin, C., Robert, M. The catalytic activity decreases over time owing to the detrimental reduction of the phthalocyanine ligand, which can be suppressed by appending electron-donating amino substituents to the phthalocyanine ring. We find that the conversion, which proceeds via a distinct domino process with CO as an intermediate, generates methanol with a Faradaic efficiency higher than 40 per cent and a partial current density greater than 10 milliamperes per square centimetre at −0.94 volts with respect to the reversible hydrogen electrode in a near-neutral electrolyte. Here we show that when immobilized on carbon nanotubes, cobalt phthalocyanine-used previously to reduce CO 2 to primarily CO-catalyses the six-electron reduction of CO 2 to methanol with appreciable activity and selectivity. However, these catalysts generally lack the ability to promote CO 2 reduction beyond the two-electron process to generate more valuable products 1, 3. Molecular catalysts have well defined active sites and accurately tailorable structures that allow mechanism-based performance optimization, and transition-metal complexes have been extensively explored in this regard.
Electrochemical carbon dioxide (CO 2) reduction can in principle convert carbon emissions to fuels and value-added chemicals, such as hydrocarbons and alcohols, using renewable energy, but the efficiency of the process is limited by its sluggish kinetics 1, 2.
0 kommentar(er)
