Switching of CO2 hydrogenation selectivity via chlorine poisoning over Ru/TiO2 catalyst

Switchable tuning selectivity of CO2 hydrogenation via anion-modification of the Ru/TiO2 catalyst

“…Zhang et al studied the role of Cl ions on the Ru/TiO 2 catalyst surface in regulating CO 2 hydrogenation products. 19 A series of Ru/TiO 2 catalysts with different Cl contents were obtained by controlling the amount of washing water in catalyst preparation. It was found that there was a strong interaction between Cl ions and Ru metal sites, which affected the adsorption of CO intermediates, thus improving CO selectivity in CO 2 hydrogenation.…”

“…2b), the product distribution was similar to that at 200 1C, although the selectivity of CO was slightly improved, which may be related to the exothermicity of the CO 2 methanation process. 19 We further investigated the effect of the concentration of OH À and NO 3 À ions on the catalytic performance of Ru/TiO 2 catalysts. With the increase in the added OH À ion concentration, the CO 2 conversion and CH 4 selectivity significantly increased (Table S6, ESI †), further proving that the OH À ions on the Ru/TiO 2 catalysts surface have high selectivity for CH 4 products.…”