Surfactant-Assisted Stabilization of Au Colloids on Solids for Heterogeneous Catalysis.
The stabilization of surfactant-assisted synthesized colloidal noble metal nanoparticles (NPs, such as 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, surfactant removal to obtain clean surfaces for catalysis through traditional approaches (such as solvent extraction and thermal decomposition) can easily induce the sintering of NPs, greatly hampering their use in synthesis of novel catalysts. Such unwanted surfactants have now been utilized to stabilize NPs on solids by a simple yet efficient thermal annealing strategy. After being annealed in N2flow, the surface-bound surfactants are carbonized in situ 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.
Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P.R. China.
Wangcheng
0000-0001-9094-3915
W
Zhan
Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P.R. China.
Yuan
Y
Shu
Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P.R. China.|Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
Yujie
0000-0002-4808-8545
Y
Sheng
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
Huiyuan
0000-0002-9962-1661
H
Zhu
Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P.R. China.
Yanglong
Y
Guo
Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P.R. China.|Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
Li
L
Wang
Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P.R. China.
Yun
Y
Guo
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
Jinshui
0000-0003-4649-6526
J
Zhang
Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P.R. China.
Guanzhong
G
Lu
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.|Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA.
Sheng
0000-0002-8046-3931
S
Dai
colloids; gold; heterogeneous catalysis; surface-bound surfactant; thermal annealing