20.500.12556/DKUM-92458 Evaluation of ▫$Au/ZrO_2$▫ catalysts prepared via postsynthesis methods in ▫$CO_2$▫ hydrogenation to methanol Au nanoparticles supported on ZrO2 enhance its surface acidic/basic properties to produce a high yield of methanol via the hydrogenation of CO2. Amorphous ZrO2-supported 0.5–1 wt.% Au catalysts were synthesized by two methods, namely deposition precipitation (DP) and impregnation (IMP), characterized by a variety of techniques, and evaluated in the process of CO2 hydrogenation to methanol. The DP-method catalysts were highly advantageous over the IMP-method catalyst. The DP method delivered samples with a large surface area, along with the control of the Au particle size. The strength and number of acidic and basic sites was enhanced on the catalyst surface. These surface changes attributed to the DP method greatly improved the catalytic activity when compared to the IMP method. The variations in the surface sites due to different preparation methods exhibited a huge impact on the formation of important intermediates (formate, dioxymethylene and methoxy) and their rapid hydrogenation to methanol via the formate route, as revealed by means of in situ DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy) analysis. Finally, the rate of formation of methanol was enhanced by the increased synergy between the metal and the support. kataliza metanol sinteze nanodelci ogljikov dioksid true false true MDPI AG Angleški jezik Slovenski jezik https://www.mdpi.com/journal/catalysts © 2022 by the authors Članek v reviji 2025-04-10 09:08:20 2025-04-10 09:08:20 2025-04-11 03:14:11 0000-00-00 00:00:00 2022 0 0 str. 1-25 iss. 2 Vol. 12 14 Feb. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2022-01-26 2022-02-11 2022-02-14 544.3/.4 97497347 10.3390/catal12020218 2073-4344 catalysts-12-00218-v2.pdf catalysts-12-00218-v2.pdf 1 0618A16005E6B73BC7C1477045D0E6F0 fdb4e175b5206737d6bccd5cb91fde40679cd1a02d0394118aaf9cac4a270707 1155b871-15db-11f0-980a-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=190174 https://www.mdpi.com/2073-4344/12/2/218 1 962b50a3-15da-11f0-980a-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=190170 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0