| Title: | Evaluation of ▫$Au/ZrO_2$▫ catalysts prepared via postsynthesis methods in ▫$CO_2$▫ hydrogenation to methanol |
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| Authors: | ID Vikram Sagar, T. (Author)
ID Zavašnik, Janez (Author)
ID Finšgar, Matjaž (Author)
ID Novak Tušar, Nataša (Author)
ID Pintar, Albin (Author) |
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| Files: |  catalysts-12-00218-v2.pdf (32,96 MB)
MD5: 0618A16005E6B73BC7C1477045D0E6F0
 https://www.mdpi.com/2073-4344/12/2/218
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | 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. |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 26.01.2022 |
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| Article acceptance date: | 11.02.2022 |
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| Publication date: | 14.02.2022 |
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| Publisher: | MDPI AG |
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| Year of publishing: | 2022 |
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| Number of pages: | str. 1-25 |
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| Numbering: | Vol. 12, iss. 2 |
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| PID: | 20.500.12556/DKUM-92458  |
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| UDC: | 544.3/.4 |
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| ISSN on article: | 2073-4344 |
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| COBISS.SI-ID: | 97497347 |
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| DOI: | 10.3390/catal12020218 |
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| Copyright: | © 2022 by the authors |
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| Publication date in DKUM: | 10.04.2025 |
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| Views: | 156 |
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| Downloads: | 11 |
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| Metadata: |    |
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| Categories: | Misc.
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