High temperature reduction dramatically promotes Pd/TiO2 catalyst for ambient formaldehyde oxidation
文献类型：期刊论文
| 作者 | Li, Yaobin; Zhang, Changbin; Ma, Jinzhu; Chen, Min; Deng, Hua; He, Hong |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2017-11-15 |
| 卷号 | 217期号:0页码:560-569 |
| 关键词 | Formaldehyde Pd/tio2 Low/high Temperature Reduction Smsi Oxygen Vacancies Reaction Pathway |
| 英文摘要 | High temperature reduction generally induces the sintering of supported noble metals, therefore resulting in a negative effect on their performance. Here, we show that high temperature reduction was able to dramatically increase the activity of Pd/TiO2 for ambient HCHO oxidation. We prepared a Pd/TiO2 catalyst and pre-reduced it with H-2 at low temperature (300 degrees C) and high temperature (450 degrees C), respectively, and then tested the activity for HCHO oxidation at ambient temperature. The Pd/TiO2-450R catalyst showed a much better performance than Pd/TiO2-300R at room temperature. 100% HCHO conversion could be obtained on the Pd/TiO2-450R catalyst at a GHSV of 95000 h(-1) and 140 ppm inlet HCHO. The catalysts were then characterized by using Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), High angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and other methods. The results indicate that high temperature reduction could induce the strong metal-support interaction (SMSI), decreasing the surface Pd particle size by partially encapsulating and trapping Pd clusters with TiO2, and also could produce more oxygen vacancies, beneficial to the activation of O-2 and formation of surface OH groups, opening a more effective pathway for ambient HCHO oxidation. Therefore, the Pd/TiO2-450R catalyst demonstrated high activity for ambient HCHO oxidation. (C) 2017 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39202]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 推荐引用方式 GB/T 7714 | Li, Yaobin,Zhang, Changbin,Ma, Jinzhu,et al. High temperature reduction dramatically promotes Pd/TiO2 catalyst for ambient formaldehyde oxidation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,217(0):560-569. |
| APA | Li, Yaobin,Zhang, Changbin,Ma, Jinzhu,Chen, Min,Deng, Hua,&He, Hong.(2017).High temperature reduction dramatically promotes Pd/TiO2 catalyst for ambient formaldehyde oxidation.APPLIED CATALYSIS B-ENVIRONMENTAL,217(0),560-569. |
| MLA | Li, Yaobin,et al."High temperature reduction dramatically promotes Pd/TiO2 catalyst for ambient formaldehyde oxidation".APPLIED CATALYSIS B-ENVIRONMENTAL 217.0(2017):560-569. |
入库方式： OAI收割
来源：生态环境研究中心
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