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

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [2];  [1];  [2]
  1. East China Univ. of Science and Technology, Shanghai (People's Republic of China)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1350941
Journal Information:
Angewandte Chemie (International Edition), Vol. 56, Issue 16; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 114 works
Citation information provided by
Web of Science

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Synthesis of highly efficient Co3O4 catalysts by heat treatment ZIF-67 for CO oxidation journal August 2018
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Taming the stability of Pd active phases through a compartmentalizing strategy toward nanostructured catalyst supports journal April 2019
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