Enhancing the CO2 methanation activity of Ni/CeO2 via activation treatment-determined metal-support interaction

Advances in studies of the structural effects of supported Ni catalysts for CO2hydrogenation: from nanoparticle to single atom catalyst

“…The oxygen vacancy of the support significantly enhances the Ni–support interaction, stabilizes the nickel nanoparticles, promotes the formation of a Ni–support active interface and improves the adsorption of carbon dioxide and hydrogen. 102,103,105,109,129–135 Obviously, the effect of the support cannot be ignored. 136,137 Tsubaki and his co-workers 138 recently reported the preparation of nanoparticle promoted Ni-based bimodal pore catalysts by the impregnation of nickel precursor on SiO 2 , Al 2 O 3 and ZrO 2 nanoparticle modified SiO 2 supports.…”

Effect of Rutile Content on the Catalytic Performance of Ru/TiO2 Catalyst for Low-Temperature CO2 Methanation

“…7 Up to now, supported metal-based catalysts (e.g., Ni, Ru, and Rh) have been reported as potential catalysts for this reaction in a large number of studies. 9,10 Among them, Ru-based catalysts are more promising for CO 2 methanation applications since they are less conducive to deactivation by carbon deposition than Ni and less expensive than Rh. 11−14 Previous studies suggested that the metal sites in supported metal/oxide catalysts were able to dissociate hydrogen (H 2 ), while the oxide and the metal−oxide interface were responsible for the adsorption and activation of CO 2 .…”

“…Therefore, designing a catalyst with high activity and high CH 4 selectivity at low reaction temperatures rationally is still one of the major goals in CO 2 methanation . Up to now, supported metal-based catalysts (e.g., Ni, Ru, and Rh) have been reported as potential catalysts for this reaction in a large number of studies. , Among them, Ru-based catalysts are more promising for CO 2 methanation applications since they are less conducive to deactivation by carbon deposition than Ni and less expensive than Rh. − …”

Investigation of the Structure and Interface Features of Ni/Ce1–xZrxO2 Catalysts for CO and CO2 Methanation

“…The suggestions about metal− support interaction have been made from X-ray photoelectron spectroscopy studies. 12,17,18 Possible incorporation of Ni 2+ cations into the CeO 2 lattice has been proposed on the basis of Raman spectroscopy data indicating distortion of the CeO 2 lattice at increasing Ni content in the Ni/CeO 2 catalysts. 15,17−19 We have not found conclusions about the metal−support interaction made from XRD studies.…”

“…The reduced CeO x surface species were reported to facilitate activation of CO 2 molecules and assist CO dissociation through their ability to accept oxygen. ,, In Ni/CeO 2 catalysts, hydrogen spillover from metallic Ni 0 nanoparticles to CeO 2 can promote the partial reduction of the support and the generation of oxygen vacancies at the metal/support interface . Moreover, possible interaction between nickel species and ceria can yield additional oxygen vacancies at the Ni/CeO 2 interface. , So, performance of the Ni/CeO 2 catalysts in the CO and CO 2 methanation is closely related to the reducibility of the CeO 2 surface, length of the Ni/CeO 2 interface, and possible metal–support interaction.…”