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Title: Surfactant-assisted stabilization of Au colloids on solids for heterogeneous catalysis

Abstract

Here, the stabilization of surfactant-assisted synthesized colloidal noble metal nanoparticles (NPs, e.g., Au NPs) on solids is a promising strategy for preparing supported nanocatalysts for heterogeneous catalysis because of their uniform particle sizes, controllable shapes, and tunable compositions. However, the removal of surfactants to obtain clean surfaces for catalysis through traditional approaches (e.g., solvent extraction and thermal decomposition) can easily induce the sintering of NPs, greatly hampering their use in synthesis of novel catalysts. Herein, we demonstrate that such unwanted surfactants can be utilized to stabilize NPs on solids via a simple yet efficient thermal annealing strategy. After being annealed in N2 flow, the surface-bound surfactants are in situ carbonized as sacrificial architectures that form a conformal coating on NPs and assist in creating an enhanced metal-support interaction between NPs and substrate, thus slowing down the Ostwald ripening process during post-oxidative calcination to remove surface covers.

Authors:
 [1];  [1];  [1];  [2];  [3];  [1];  [1];  [2];  [1];  [3];  [1];  [3];  [4]
  1. East China Univ. of Science and Technology, Shanghai (People's Republic of China)
  2. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1350941
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 56; Journal Issue: 16; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; colloids; surface-bound surfactant; thermal annealing; Au; nanocatalyst; heterogeneous catalysis

Citation Formats

Zhan, Wangcheng, Shu, Yuan, Sheng, Yujie, Oak Ridge National Lab., Zhu, Huiyuan, Guo, Yanglong, Wang, Li, Oak Ridge National Lab., Guo, Yun, Zhang, Jinshui, Lu, Guanzhong, Dai, Sheng, and Univ. of Tennessee, Knoxville, TN. Surfactant-assisted stabilization of Au colloids on solids for heterogeneous catalysis. United States: N. p., 2017. Web. doi:10.1002/anie.201701191.
Zhan, Wangcheng, Shu, Yuan, Sheng, Yujie, Oak Ridge National Lab., Zhu, Huiyuan, Guo, Yanglong, Wang, Li, Oak Ridge National Lab., Guo, Yun, Zhang, Jinshui, Lu, Guanzhong, Dai, Sheng, & Univ. of Tennessee, Knoxville, TN. Surfactant-assisted stabilization of Au colloids on solids for heterogeneous catalysis. United States. https://doi.org/10.1002/anie.201701191
Zhan, Wangcheng, Shu, Yuan, Sheng, Yujie, Oak Ridge National Lab., Zhu, Huiyuan, Guo, Yanglong, Wang, Li, Oak Ridge National Lab., Guo, Yun, Zhang, Jinshui, Lu, Guanzhong, Dai, Sheng, and Univ. of Tennessee, Knoxville, TN. Wed . "Surfactant-assisted stabilization of Au colloids on solids for heterogeneous catalysis". United States. https://doi.org/10.1002/anie.201701191. https://www.osti.gov/servlets/purl/1350941.
@article{osti_1350941,
title = {Surfactant-assisted stabilization of Au colloids on solids for heterogeneous catalysis},
author = {Zhan, Wangcheng and Shu, Yuan and Sheng, Yujie and Oak Ridge National Lab. and Zhu, Huiyuan and Guo, Yanglong and Wang, Li and Oak Ridge National Lab. and Guo, Yun and Zhang, Jinshui and Lu, Guanzhong and Dai, Sheng and Univ. of Tennessee, Knoxville, TN},
abstractNote = {Here, the stabilization of surfactant-assisted synthesized colloidal noble metal nanoparticles (NPs, e.g., Au NPs) on solids is a promising strategy for preparing supported nanocatalysts for heterogeneous catalysis because of their uniform particle sizes, controllable shapes, and tunable compositions. However, the removal of surfactants to obtain clean surfaces for catalysis through traditional approaches (e.g., solvent extraction and thermal decomposition) can easily induce the sintering of NPs, greatly hampering their use in synthesis of novel catalysts. Herein, we demonstrate that such unwanted surfactants can be utilized to stabilize NPs on solids via a simple yet efficient thermal annealing strategy. After being annealed in N2 flow, the surface-bound surfactants are in situ carbonized as sacrificial architectures that form a conformal coating on NPs and assist in creating an enhanced metal-support interaction between NPs and substrate, thus slowing down the Ostwald ripening process during post-oxidative calcination to remove surface covers.},
doi = {10.1002/anie.201701191},
journal = {Angewandte Chemie (International Edition)},
number = 16,
volume = 56,
place = {United States},
year = {Wed Mar 22 00:00:00 EDT 2017},
month = {Wed Mar 22 00:00:00 EDT 2017}
}

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