Crystalline MoS₂-enhanced conductive black titania for efficient solar to chemical energy conversion: photocatalytic CO₂ reduction and CH₄ oxidation

Abstract

Here we report a facile direct solid-state reaction strategy employing crystalline MoS2 coupled conductive black titania (BT) to create nanocomposites with BT−MoS2 substantial synergy. BT-MoS2 shows a typical surface Vo-rich...

Tailoring the electronic structure of In2O3/C photocatalysts for enhanced CO2reduction

“…5). Aer adsorbing CO 2 gas and H 2 O vapor for 25 minutes, monodentate carbonate (m-CO 3 The peak is ascribed to COOH*, which is generally regarded as the crucial intermediate during CO 2 reduction to CO. 9,37 In addition, a remarkable signal at 2077 cm −1 ascribed to the CO* absorption band is also detected (Fig. S32 †).…”

“…[4][5][6] As an efficient way of utilizing carbon dioxide (CO 2 ) to produce various chemical fuels, solar-driven CO 2 reduction has gained a lot of attention. [7][8][9][10] However, the photocatalytic efficiency remains unsatisfactory because the stubborn C]O double bond in a nonpolar CO 2 molecule requires high energy for activation, leading to sluggish kinetics issues. [11][12][13] In light of this, great efforts have been devoted to optimizing the structure of photocatalysts so as to improve the conversion and selectivity of CO 2 reduction.…”

Synergistic effects of Fe-substitutional-doping and a surface close-contact Fe2O3/CeO2 heterojunction in Fe/CeO2 for enhanced CH4 photocatalytic conversion

“…3 In addition, CH 4 is difficult to liquefy at atmospheric pressure due to its extremely low boiling point (109 K), which makes longdistance transportation difficult. 2 Thus in addition to CO 2 reduction, [4][5][6][7][8] on-site chemical conversion of CH 4 into valueadded, transportable and storable liquid fuels is highly desirable. 9,10 As one of the most promising catalyst candidates, CeO 2 is popular because of its low cost, huge reserves and non-toxicity.…”

“…4 can continuously adsorb and enrich on the surface of 1 : 3 Fe/CeO 2 -900/6 because of its negative adsorption energy (−0.11 eV), and ensured that the conversion reaction proceeded smoothly. The process of CH 4 cleavage to form $CH 3 is exothermic with a reaction energy (E r ) and activation barrier energy (E a ) of −0.88 and 0.043 eV respectively, conrming the great advantage of 1 : 3 Fe/CeO 2 -900/6 in CH 4 conversion.…”

Visible-light-driven and selective methane conversion to oxygenates with air on a halide-perovskite-based photocatalyst under mild conditions

“…Abundant and low-cost methane (CH 4 ) is currently a highquality fossil fuel, but it is also an important greenhouse gas, 1,2 and its exothermic combustion releases large amounts of CO 2 . Catalytic transformation of CH 4 into a variety of highvalue-added chemicals is a win-win strategy for the effective utilization of CH 4 and the suppression of carbon emissions into the atmosphere.…”