Active and stable Pt-Ceria nanowires@silica shell catalyst: Design, formation mechanism and total oxidation of CO and toluene
Abstract
Cerium oxide is one of the most important rare earth metal oxides in catalysis, however, the sintering problem of noble metals and CeO2 at higher temperature (e.g., >700 °C) is still unresolved. Herein, Pt nanoparticles self-assembled on ultra-thin CeO2 nanowires (NWs) and then confined inside a thermally robust porous silica shell (Pt-CeO2NW@SiO2) were introduced. The thickness of CeO2 NWs was just ~2.0 nm. Moreover, Pt-CeO2 NW@SiO2 showed significantly enhanced catalytic performances for total oxidation of CO and toluene. The increased catalytic properties are attributed to the strong metal-support interaction effect between Pt and CeO2 NWs at sub-nanoscale. Most importantly, the special core-shell structure also affords excellent sintering resistance retention up to 700 °C for 100 h, due to the guarding effect of porous silica shell. Finally, the formation mechanism of Pt-CeO2 NW@SiO2 was investigated in detail. Current strategy should inspire many rational designs of rare-earth metal-based nanocatalysts for real-world catalysts.
- Authors:
-
[1];
[2];
[3];
- Nanchang Univ. (China). College of Chemistry, Key Laboratory of Jiangxi Province for Environment and Energy Catalysis; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Div.
- Nanchang Univ. (China). College of Chemistry, Key Laboratory of Jiangxi Province for Environment and Energy Catalysis
- Shanghai Jiao Tong Univ. (China). School of Chemistry and Chemical Engineering
- Ningxia Univ., Yinchuan (China). State Key Laboratory of High-efficiency Utilization of Coal & Green Chemical Engineering
- East China Normal Univ. (ECNU), Shanghai (China). Dept. of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Div.; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1783031
- Grant/Contract Number:
- AC05-00OR22725; 2016YFC0205900; 21503106; 21566022; 21773106
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Catalysis B: Environmental
- Additional Journal Information:
- Journal Volume: 256; Journal Issue: n/a; Journal ID: ISSN 0926-3373
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Ceria nanowires; Mesoporous materials; Self-assembly; Core-shell catalysts; VOCs combustion
Citation Formats
Peng, Honggen, Dong, Tao, Zhang, Li, Wang, Caili, Liu, Wenming, Bao, Jiafeng, Wang, Xiang, Zhang, Ning, Wang, Zheng, Wu, Peng, Zhang, Pengfei, and Dai, Sheng. Active and stable Pt-Ceria nanowires@silica shell catalyst: Design, formation mechanism and total oxidation of CO and toluene. United States: N. p., 2019.
Web. doi:10.1016/j.apcatb.2019.117807.
Peng, Honggen, Dong, Tao, Zhang, Li, Wang, Caili, Liu, Wenming, Bao, Jiafeng, Wang, Xiang, Zhang, Ning, Wang, Zheng, Wu, Peng, Zhang, Pengfei, & Dai, Sheng. Active and stable Pt-Ceria nanowires@silica shell catalyst: Design, formation mechanism and total oxidation of CO and toluene. United States. https://doi.org/10.1016/j.apcatb.2019.117807
Peng, Honggen, Dong, Tao, Zhang, Li, Wang, Caili, Liu, Wenming, Bao, Jiafeng, Wang, Xiang, Zhang, Ning, Wang, Zheng, Wu, Peng, Zhang, Pengfei, and Dai, Sheng. Tue .
"Active and stable Pt-Ceria nanowires@silica shell catalyst: Design, formation mechanism and total oxidation of CO and toluene". United States. https://doi.org/10.1016/j.apcatb.2019.117807. https://www.osti.gov/servlets/purl/1783031.
@article{osti_1783031,
title = {Active and stable Pt-Ceria nanowires@silica shell catalyst: Design, formation mechanism and total oxidation of CO and toluene},
author = {Peng, Honggen and Dong, Tao and Zhang, Li and Wang, Caili and Liu, Wenming and Bao, Jiafeng and Wang, Xiang and Zhang, Ning and Wang, Zheng and Wu, Peng and Zhang, Pengfei and Dai, Sheng},
abstractNote = {Cerium oxide is one of the most important rare earth metal oxides in catalysis, however, the sintering problem of noble metals and CeO2 at higher temperature (e.g., >700 °C) is still unresolved. Herein, Pt nanoparticles self-assembled on ultra-thin CeO2 nanowires (NWs) and then confined inside a thermally robust porous silica shell (Pt-CeO2NW@SiO2) were introduced. The thickness of CeO2 NWs was just ~2.0 nm. Moreover, Pt-CeO2 NW@SiO2 showed significantly enhanced catalytic performances for total oxidation of CO and toluene. The increased catalytic properties are attributed to the strong metal-support interaction effect between Pt and CeO2 NWs at sub-nanoscale. Most importantly, the special core-shell structure also affords excellent sintering resistance retention up to 700 °C for 100 h, due to the guarding effect of porous silica shell. Finally, the formation mechanism of Pt-CeO2 NW@SiO2 was investigated in detail. Current strategy should inspire many rational designs of rare-earth metal-based nanocatalysts for real-world catalysts.},
doi = {10.1016/j.apcatb.2019.117807},
journal = {Applied Catalysis B: Environmental},
number = n/a,
volume = 256,
place = {United States},
year = {Tue Jun 04 00:00:00 EDT 2019},
month = {Tue Jun 04 00:00:00 EDT 2019}
}
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