A Sacrificial Coating Strategy Toward Enhancement of Metal-Support Interaction for Ultrastable Au Nanocatalysts
Abstract
Supported gold (Au) nanocatalysts hold great promise for heterogeneous catalysis; however, their practical application is greatly hampered by poor thermodynamic stability. Herein, a general synthetic strategy is reported where discrete metal nanoparticles are made resistant to sintering, preserving their catalytic activities in high-temperature oxidation processes. Taking advantage of the unique coating chemistry of dopamine, sacrificial carbon layers are constructed on the material surface, stabilizing the supported catalyst. Upon annealing at high temperature under an inert atmosphere, the interactions between support and metal nanoparticle are dramatically enhanced, while the sacrificial carbon layers can be subsequently removed through oxidative calcination in air. Owing to the improved metal-support contact and strengthened electronic interactions, the resulting Au nanocatalysts are resistant to sintering and exhibit excellent durability for catalytic combustion of propylene at elevated temperatures. Moreover, the facile synthetic strategy can be extended to the stabilization of other supported catalysts on a broad range of supports, providing a general approach to enhancing the thermal stability and sintering resistance of supported nanocatalysts.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- East China Univ. of Science and Technology (ECUST), Shanghai (China)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1337043
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the American Chemical Society
- Additional Journal Information:
- Journal Volume: 138; Journal Issue: 49; Journal ID: ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; supported Au nanocatalyst; metal-support architecture; annealing engineering; strong interfacial bonding
Citation Formats
Zhan, Wangcheng, He, Qian, Liu, Xiaofei, Guo, Yanglong, Wang, Yanqin, Wang, li, Guo, Yun, Borisevich, Albina Y., Zhang, Jinshui, Lu, Guanzhong, and Dai, Sheng. A Sacrificial Coating Strategy Toward Enhancement of Metal-Support Interaction for Ultrastable Au Nanocatalysts. United States: N. p., 2016.
Web. doi:10.1021/jacs.6b10472.
Zhan, Wangcheng, He, Qian, Liu, Xiaofei, Guo, Yanglong, Wang, Yanqin, Wang, li, Guo, Yun, Borisevich, Albina Y., Zhang, Jinshui, Lu, Guanzhong, & Dai, Sheng. A Sacrificial Coating Strategy Toward Enhancement of Metal-Support Interaction for Ultrastable Au Nanocatalysts. United States. https://doi.org/10.1021/jacs.6b10472
Zhan, Wangcheng, He, Qian, Liu, Xiaofei, Guo, Yanglong, Wang, Yanqin, Wang, li, Guo, Yun, Borisevich, Albina Y., Zhang, Jinshui, Lu, Guanzhong, and Dai, Sheng. Tue .
"A Sacrificial Coating Strategy Toward Enhancement of Metal-Support Interaction for Ultrastable Au Nanocatalysts". United States. https://doi.org/10.1021/jacs.6b10472. https://www.osti.gov/servlets/purl/1337043.
@article{osti_1337043,
title = {A Sacrificial Coating Strategy Toward Enhancement of Metal-Support Interaction for Ultrastable Au Nanocatalysts},
author = {Zhan, Wangcheng and He, Qian and Liu, Xiaofei and Guo, Yanglong and Wang, Yanqin and Wang, li and Guo, Yun and Borisevich, Albina Y. and Zhang, Jinshui and Lu, Guanzhong and Dai, Sheng},
abstractNote = {Supported gold (Au) nanocatalysts hold great promise for heterogeneous catalysis; however, their practical application is greatly hampered by poor thermodynamic stability. Herein, a general synthetic strategy is reported where discrete metal nanoparticles are made resistant to sintering, preserving their catalytic activities in high-temperature oxidation processes. Taking advantage of the unique coating chemistry of dopamine, sacrificial carbon layers are constructed on the material surface, stabilizing the supported catalyst. Upon annealing at high temperature under an inert atmosphere, the interactions between support and metal nanoparticle are dramatically enhanced, while the sacrificial carbon layers can be subsequently removed through oxidative calcination in air. Owing to the improved metal-support contact and strengthened electronic interactions, the resulting Au nanocatalysts are resistant to sintering and exhibit excellent durability for catalytic combustion of propylene at elevated temperatures. Moreover, the facile synthetic strategy can be extended to the stabilization of other supported catalysts on a broad range of supports, providing a general approach to enhancing the thermal stability and sintering resistance of supported nanocatalysts.},
doi = {10.1021/jacs.6b10472},
journal = {Journal of the American Chemical Society},
number = 49,
volume = 138,
place = {United States},
year = {Tue Nov 22 00:00:00 EST 2016},
month = {Tue Nov 22 00:00:00 EST 2016}
}
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