Evaluation of Au/ZrO<sub>2</sub> Catalysts Prepared via Postsynthesis Methods in CO<sub>2</sub> Hydrogenation to Methanol
Au nanoparticles supported on ZrO<sub>2</sub> enhance its surface acidic/basic properties to produce a high yield of methanol via the hydrogenation of CO<sub>2</sub>. Amorphous ZrO<sub>2</sub>-supported 0.5–1 wt.% Au catalysts were synthesized by two methods, name...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/12/2/218 |
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| author | Tatiparthi Vikram Sagar Janez Zavašnik Matjaž Finšgar Nataša Novak Tušar Albin Pintar |
| author_facet | Tatiparthi Vikram Sagar Janez Zavašnik Matjaž Finšgar Nataša Novak Tušar Albin Pintar |
| author_sort | Tatiparthi Vikram Sagar |
| collection | DOAJ |
| description | Au nanoparticles supported on ZrO<sub>2</sub> enhance its surface acidic/basic properties to produce a high yield of methanol via the hydrogenation of CO<sub>2</sub>. Amorphous ZrO<sub>2</sub>-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 CO<sub>2</sub> 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. |
| first_indexed | 2024-03-09T22:20:53Z |
| format | Article |
| id | doaj.art-23eaba169748493c81d7d2e6507b3478 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T22:20:53Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-23eaba169748493c81d7d2e6507b34782023-11-23T19:13:15ZengMDPI AGCatalysts2073-43442022-02-0112221810.3390/catal12020218Evaluation of Au/ZrO<sub>2</sub> Catalysts Prepared via Postsynthesis Methods in CO<sub>2</sub> Hydrogenation to MethanolTatiparthi Vikram Sagar0Janez Zavašnik1Matjaž Finšgar2Nataša Novak Tušar3Albin Pintar4Laboratory for Environmental Sciences and Engineering, Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, SloveniaDepartment of Gaseous Electronics, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, SloveniaFaculty of Chemistry and Chemical Engineering, University of Maribor, SI-2000 Maribor, SloveniaLaboratory for Environmental Sciences and Engineering, Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, SloveniaLaboratory for Environmental Sciences and Engineering, Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, SloveniaAu nanoparticles supported on ZrO<sub>2</sub> enhance its surface acidic/basic properties to produce a high yield of methanol via the hydrogenation of CO<sub>2</sub>. Amorphous ZrO<sub>2</sub>-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 CO<sub>2</sub> 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.https://www.mdpi.com/2073-4344/12/2/218Au/ZrO<sub>2</sub>CO<sub>2</sub> hydrogenationmethanol synthesisin situ DRIFTSCO<sub>2</sub> utilization |
| spellingShingle | Tatiparthi Vikram Sagar Janez Zavašnik Matjaž Finšgar Nataša Novak Tušar Albin Pintar Evaluation of Au/ZrO<sub>2</sub> Catalysts Prepared via Postsynthesis Methods in CO<sub>2</sub> Hydrogenation to Methanol Catalysts Au/ZrO<sub>2</sub> CO<sub>2</sub> hydrogenation methanol synthesis in situ DRIFTS CO<sub>2</sub> utilization |
| title | Evaluation of Au/ZrO<sub>2</sub> Catalysts Prepared via Postsynthesis Methods in CO<sub>2</sub> Hydrogenation to Methanol |
| title_full | Evaluation of Au/ZrO<sub>2</sub> Catalysts Prepared via Postsynthesis Methods in CO<sub>2</sub> Hydrogenation to Methanol |
| title_fullStr | Evaluation of Au/ZrO<sub>2</sub> Catalysts Prepared via Postsynthesis Methods in CO<sub>2</sub> Hydrogenation to Methanol |
| title_full_unstemmed | Evaluation of Au/ZrO<sub>2</sub> Catalysts Prepared via Postsynthesis Methods in CO<sub>2</sub> Hydrogenation to Methanol |
| title_short | Evaluation of Au/ZrO<sub>2</sub> Catalysts Prepared via Postsynthesis Methods in CO<sub>2</sub> Hydrogenation to Methanol |
| title_sort | evaluation of au zro sub 2 sub catalysts prepared via postsynthesis methods in co sub 2 sub hydrogenation to methanol |
| topic | Au/ZrO<sub>2</sub> CO<sub>2</sub> hydrogenation methanol synthesis in situ DRIFTS CO<sub>2</sub> utilization |
| url | https://www.mdpi.com/2073-4344/12/2/218 |
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