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| Content Provider | Springer Nature Link |
|---|---|
| Author | Liao, Weiping Lv, Hongying Suo, Zhanghuai |
| Copyright Year | 2015 |
| Abstract | VO$_{x}$–CeO$_{2}$ oxides with different Ce/V molar ratios were prepared via solution combustion synthesis method. Au/VO$_{x}$–CeO$_{2}$ catalysts were obtained by the impregnation method for CO oxidation and water–gas shift reaction (WGSR). The textural properties and structures of these materials were investigated by the techniques such as nitrogen physical adsorption, X-ray diffraction, UV–Visible spectroscopy, temperature-programmed reduction, and X-ray photoelectron spectroscopy. The following activity orders are obtained: Au/CeO$_{2}$ ~ Au/Ce9V1 > Au/Ce7V3 > Au/Ce5V5 for CO oxidation at 20 °C and Au/Ce9V1 > Au/CeO$_{2}$ > Au/Ce7V3 > Au/Ce5V5 for WGSR at 350 °C. CO oxidation proceeds more easily than WGSR at the same catalyst. The catalysts with low VO$_{x}$ content show better activities. The addition of high VO$_{x}$ content to CeO$_{2}$ leads to the agglomeration of polymeric VO$_{x}$ or polyvanadate species. These species make the reduction of CeO$_{2}$ more difficult and the interaction between gold and CeO$_{2}$ weak. The presence of Au effectively enhances the reduction of CeO$_{2}$ to lower temperatures. The interaction between gold, VO$_{x}$, and CeO$_{2}$ is favorable to improving the activity of Au/VO$_{x}$–CeO$_{2}$ catalyst. |
| Starting Page | 491 |
| Ending Page | 506 |
| Page Count | 16 |
| File Format | |
| ISSN | 18785190 |
| Journal | Reaction Kinetics and Catalysis Letters |
| Volume Number | 116 |
| Issue Number | 2 |
| e-ISSN | 18785204 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2015-08-13 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Ceria Vanadia doping Supported gold catalyst CO oxidation Water–gas shift reaction Catalysis Physical Chemistry Industrial Chemistry/Chemical Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physical and Theoretical Chemistry Catalysis |
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