Thermo-photo catalytic CO₂ hydrogenation over Ru/TiO₂

Abstract

It is attractive to convert CO2 greenhouse gas into valuable compounds via photocatalysis with solar energy.

Fundamentals and applications of photo-thermal catalysis

“…32,[208][209][210] Incorporation of Ru in TiO 2 , according to Wang et al, can narrow the energy band gap of the semiconductor (2.69 eV). 211 Diverse catalytic tests were carrying out in a fixed bed reactor with a CO 2 : H 2 ratio of 1 : 3. However, catalytic tests using sunlight (equivalent to 1 sun) at 150 1C did not show any difference with experiments performed in the dark at the same temperature.…”

Photothermal synergic catalytic degradation of the gaseous organic pollutant isopropanol in oxygen vacancies utilizing ZnFe2O4

“…The 5.0 × 5.0 × 5.0 Monkhorst–Pack scheme was used for sampling of the Brillouin zone. ZnFe 2 O 4 nanostructures were optimized until the Hellmann–Feynman forces were less than 0.01 eV/Å and the energy cutoff was converged within 1.0 × 10 −5 eV. Spin polarization was applied in the calculations.…”

“…One challenge is due to the rapid combination of photo-generated electrons and holes in a redox reaction, the quantum efficiencies of most photocatalysts are low. 5 Another challenge is that during the process of catalytic reaction, refractory intermediates are sometimes deposited, which hinders the adsorption of reactants on photocatalytically active sites. 6 As is known, when the catalyst is irradiated by light, some light energy is converted into photo-generated electron-holes, and other light energy transfers into heat to increase the temperature of samples.…”

“…One challenge is due to the rapid combination of photo-generated electrons and holes in a redox reaction, the quantum efficiencies of most photocatalysts are low. 5 Another challenge is that during the process of catalytic reaction, refractory intermediates are sometimes deposited, which hinders the adsorption of reactants on photocatalytically active sites. 6…”

Highly efficient visible-light photocatalytic ethane oxidation into ethyl hydroperoxide as a radical reservoir

“…As a result, the visible-light driven photocatalytic activities were significantly improved in a series of chemical processes including water splitting, 37–39 CO 2 reforming of CH 4 , 40 steam reforming of CH 4 , 41 CO hydrogenation, 42 and CO 2 hydrogenation. 43 Based on our previous successes, introducing thermal energy is expected to enhance the efficiency of ethane oxidation under visible light irradiation, which constitutes the second hypothesis of this work.…”