Ultra-fine platinum species supported on niobium pentoxide for CO oxidation
文献类型：期刊论文
| 作者 | Wang, MM; Yu, J; Wang, DL; Si, R |
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2020 |
| 卷号 | 10期号:21页码:12326-12333 |
| 关键词 | PREFERENTIAL OXIDATION CATALYTIC-ACTIVITY LOW-TEMPERATURE FORMALDEHYDE OXIDATION NANOPARTICLES SINGLE GOLD REDUCTION ATOM H-2 |
| ISSN号 | 2046-2069 |
| DOI | 10.1039/d0ra01252a |
| 文献子类 | 期刊论文 |
| 英文摘要 | Platinum oxide supported on a Lewis acid niobium oxide (Nb2O5) support has been used for various heterogeneous and homogeneous catalysts. In this work, we used urea as a precipitating agent to obtain crystallized Nb2O5 with high surface area via a hydrothermal route. Nb2O5-supported Pt catalysts were subsequently synthesized via an incipient wetness impregnation approach. Multiple characterizations including X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and nitrogen adsorption/desorption confirmed the identical structural and textural properties of the Nb2O5 support before and after the impregnation process. Furthermore, the X-ray absorption fine structure technique (XAFS) results with related data analysis indicate that the platinum species in the fresh and H-2-pretreated samples were in the form of single atoms or ultrafine clusters. In addition, the decrease in coordination number (CN) of the first-shell Pt-O bond, as well as the formation of Pt-Pt contribution with very low CN, after H-2-pretreatment was verified, which corresponds to the decrease of oxidation state for Pt species on the surface of supports. Thus, the ultrafine-clustered metallic Pt species are considered to be more active than the oxidized Pt single ions. The current results will be of great significance in controllable synthesis of active Pt-based catalysts for other catalytic oxidation reactions. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33238]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Shanghai Inst Measurement & Testing Technol, Shanghai 200233, Peoples R China 2.TILON Grp Technol Ltd, Div China, Shanghai 200090, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China 4.Shanghai Synchrotron Radiat Facil, Zhangjiang Lab, Shanghai 201204, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, MM,Yu, J,Wang, DL,et al. Ultra-fine platinum species supported on niobium pentoxide for CO oxidation[J]. RSC ADVANCES,2020,10(21):12326-12333. |
| APA | Wang, MM,Yu, J,Wang, DL,&Si, R.(2020).Ultra-fine platinum species supported on niobium pentoxide for CO oxidation.RSC ADVANCES,10(21),12326-12333. |
| MLA | Wang, MM,et al."Ultra-fine platinum species supported on niobium pentoxide for CO oxidation".RSC ADVANCES 10.21(2020):12326-12333. |
入库方式： OAI收割
来源：上海应用物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。