Solvent-Free Catalytic Oxidation of Benzyl Alcohol over Au-Pd Bimetal Deposited on TiO2: Comparison of Rutile, Brookite, and Anatase
Abstract TiO2 (P25)-supported Au-Pd bimetal nanoparticles displayed excellent performance in the solvent-free benzyl alcohol catalytic oxidation. However, little research attention has been paid to investigate the effects of TiO2 form on the catalytic activity of Au-Pd/TiO2. In the present research,...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2019-12-01
|
| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s11671-019-3211-8 |
| _version_ | 1797764211707740160 |
|---|---|
| author | Xiaoliang Li Jiangjiang Feng Jia Sun Zhe Wang Wei Zhao |
| author_facet | Xiaoliang Li Jiangjiang Feng Jia Sun Zhe Wang Wei Zhao |
| author_sort | Xiaoliang Li |
| collection | DOAJ |
| description | Abstract TiO2 (P25)-supported Au-Pd bimetal nanoparticles displayed excellent performance in the solvent-free benzyl alcohol catalytic oxidation. However, little research attention has been paid to investigate the effects of TiO2 form on the catalytic activity of Au-Pd/TiO2. In the present research, rutile, brookite, and anatase TiO2 were successfully synthesized and subsequently applied as the carrier to load Au-Pd nanoparticles by the deposition-precipitation method. The experimental results indicated that the benzyl alcohol conversion employing the rutile TiO2-supported Au-Pd catalyst is higher than the conversion of anatase and brookite TiO2-loaded Au-Pd catalysts. However, the Au-Pd/TiO2-rutile displayed the lowest and highest selectivity toward benzaldehyde and toluene, respectively. ICP-AES, XRD, XPS, and TEM were conducted to characterize these catalysts. The corresponding experimental results revealed that the excellent performance of Au-Pd/TiO2-rutile catalyst was attributed to both the smaller Au-Pd nanoparticle size distribution and the higher concentrations of Oα and Pd2+ species on the catalyst surface. In the recycle experiments, the Au-Pd/TiO2-rutile catalyst displayed lower reaction stability compared with the Au-Pd/TiO2-anatase and Au-Pd/TiO2-brookite, which might be due to the coverage of larger amount of aldehyde products on the surface. |
| first_indexed | 2024-03-12T19:52:26Z |
| format | Article |
| id | doaj.art-dfb191e6fcb746e49c71e350fa6a738a |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T19:52:26Z |
| publishDate | 2019-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-dfb191e6fcb746e49c71e350fa6a738a2023-08-02T03:06:04ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2019-12-011411910.1186/s11671-019-3211-8Solvent-Free Catalytic Oxidation of Benzyl Alcohol over Au-Pd Bimetal Deposited on TiO2: Comparison of Rutile, Brookite, and AnataseXiaoliang Li0Jiangjiang Feng1Jia Sun2Zhe Wang3Wei Zhao4State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of TechnologyState Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of TechnologyCardiff Catalysis Institute, School of Chemistry, Cardiff UniversityState Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of TechnologyState Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of TechnologyAbstract TiO2 (P25)-supported Au-Pd bimetal nanoparticles displayed excellent performance in the solvent-free benzyl alcohol catalytic oxidation. However, little research attention has been paid to investigate the effects of TiO2 form on the catalytic activity of Au-Pd/TiO2. In the present research, rutile, brookite, and anatase TiO2 were successfully synthesized and subsequently applied as the carrier to load Au-Pd nanoparticles by the deposition-precipitation method. The experimental results indicated that the benzyl alcohol conversion employing the rutile TiO2-supported Au-Pd catalyst is higher than the conversion of anatase and brookite TiO2-loaded Au-Pd catalysts. However, the Au-Pd/TiO2-rutile displayed the lowest and highest selectivity toward benzaldehyde and toluene, respectively. ICP-AES, XRD, XPS, and TEM were conducted to characterize these catalysts. The corresponding experimental results revealed that the excellent performance of Au-Pd/TiO2-rutile catalyst was attributed to both the smaller Au-Pd nanoparticle size distribution and the higher concentrations of Oα and Pd2+ species on the catalyst surface. In the recycle experiments, the Au-Pd/TiO2-rutile catalyst displayed lower reaction stability compared with the Au-Pd/TiO2-anatase and Au-Pd/TiO2-brookite, which might be due to the coverage of larger amount of aldehyde products on the surface.https://doi.org/10.1186/s11671-019-3211-8Au-Pd nanoparticlesTiO2 crystal formBrookiteRutileAnataseBenzyl alcohol oxidation |
| spellingShingle | Xiaoliang Li Jiangjiang Feng Jia Sun Zhe Wang Wei Zhao Solvent-Free Catalytic Oxidation of Benzyl Alcohol over Au-Pd Bimetal Deposited on TiO2: Comparison of Rutile, Brookite, and Anatase Nanoscale Research Letters Au-Pd nanoparticles TiO2 crystal form Brookite Rutile Anatase Benzyl alcohol oxidation |
| title | Solvent-Free Catalytic Oxidation of Benzyl Alcohol over Au-Pd Bimetal Deposited on TiO2: Comparison of Rutile, Brookite, and Anatase |
| title_full | Solvent-Free Catalytic Oxidation of Benzyl Alcohol over Au-Pd Bimetal Deposited on TiO2: Comparison of Rutile, Brookite, and Anatase |
| title_fullStr | Solvent-Free Catalytic Oxidation of Benzyl Alcohol over Au-Pd Bimetal Deposited on TiO2: Comparison of Rutile, Brookite, and Anatase |
| title_full_unstemmed | Solvent-Free Catalytic Oxidation of Benzyl Alcohol over Au-Pd Bimetal Deposited on TiO2: Comparison of Rutile, Brookite, and Anatase |
| title_short | Solvent-Free Catalytic Oxidation of Benzyl Alcohol over Au-Pd Bimetal Deposited on TiO2: Comparison of Rutile, Brookite, and Anatase |
| title_sort | solvent free catalytic oxidation of benzyl alcohol over au pd bimetal deposited on tio2 comparison of rutile brookite and anatase |
| topic | Au-Pd nanoparticles TiO2 crystal form Brookite Rutile Anatase Benzyl alcohol oxidation |
| url | https://doi.org/10.1186/s11671-019-3211-8 |
| work_keys_str_mv | AT xiaoliangli solventfreecatalyticoxidationofbenzylalcoholoveraupdbimetaldepositedontio2comparisonofrutilebrookiteandanatase AT jiangjiangfeng solventfreecatalyticoxidationofbenzylalcoholoveraupdbimetaldepositedontio2comparisonofrutilebrookiteandanatase AT jiasun solventfreecatalyticoxidationofbenzylalcoholoveraupdbimetaldepositedontio2comparisonofrutilebrookiteandanatase AT zhewang solventfreecatalyticoxidationofbenzylalcoholoveraupdbimetaldepositedontio2comparisonofrutilebrookiteandanatase AT weizhao solventfreecatalyticoxidationofbenzylalcoholoveraupdbimetaldepositedontio2comparisonofrutilebrookiteandanatase |