Suppressing byproduct formation for high selective CO2 reduction over optimized Ni/TiO2 based catalysts

Construction of the Low-Loading Ni/CeO2 Catalyst with a Boosted CO2 Methanation Performance via the Facile Pyrolysis CeO2 Support

“…The supports play a vital role in the dispersion of Ni species and the interaction between the metal and carrier in Ni-based catalysts, which essentially impacts the catalytic performance by changing the energetic profiles of CO 2 adsorption and activation . As a consequence, a large number of carriers including aluminium oxide (Al 2 O 3 ), titanium dioxide (TiO 2 ), silicon dioxide (SiO 2 ), zirconium dioxide (ZrO 2 ), and cerium­(IV) oxide (CeO 2 ) have been intensely investigated. − Among them, CeO 2 has received more attention because of its thermal stability, sufficient oxygen vacancies, strong metal–support interaction, and excellent adsorption for CO 2 . Various preparation methods along with different crystal faces and morphologies have been developed to fabricate highly efficient CeO 2 supports to drive CO 2 methanation. − Although great progress has been achieved, the excellent catalytic performance (high CO 2 conversion and CH 4 selectivity) of these advanced Ni/CeO 2 catalysts has usually been at the expense of high Ni loading (more than 10 wt %). , Moreover, the inferior CO 2 conversion efficiency at low temperatures (<300 °C) and relatively complicated preparation process of CeO 2 supports remain major challenges in this area .…”

In situ construction of a 2D CoTiO3/g-C3N4 photocatalyst with an S-scheme heterojunction and its excellent performance for CO2 reduction

“…methane, methanol and ethanol, is considered a promising method for converting greenhouse gases into valuable chemical fuels. 6–13 Although extensive experimental work has been done, there are still some challenges with photocatalytic CO 2 reduction: (1) CO 2 is an extremely stable molecule with a bond energy of 750 kJ mol −1 for the CO double bond, which is significantly higher than the bond energy of the C–H bond (430 kJ mol −1 ) and the C–C bond (336 kJ mol −1 ) in the reduced product, indicating a large amount of energy is required to induce the conversion of CO 2 ; (2) due to the lack of conversion efficiency in semiconductor photocatalysts, the selectivity of target products is low and the photocatalytic reduction rate is slow. Therefore, the development of photocatalytic systems with high activity and good selectivity is highly desirable.…”