文献类型：期刊文献

英文题名：Surfactant-Assisted Stabilization of Au Colloids on Solids for Heterogeneous Catalysis

作者：Zhan, Wangcheng[1];Shu, Yuan[1];Sheng, Yujie[1,2];Zhu, Huiyuan[2];Guo, Yanglong[1];Wang, Li[1,2];Guo, Yun[1];Zhang, Jinshui[2];Lu, Guanzhong[1];Dai, Sheng[2,3]

机构：[1]East China Univ Sci & Technol, Inst Ind Catalysis, Key Lab Adv Mat & Res, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA;[3]Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

年份：2017

卷号：56

期号：16

起止页码：4494

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20171303498818);WOS:【SCI-EXPANDED(收录号:WOS:000398154000014)】；

基金：W.C.Z., Y.L.G., and G.Z.L. appreciate the financial support from the National Key Basic Research Program of China (2013CB933200), the National Key Research and Development Program of China (2016YFC0204300), and the 111 project (B08021). Y.G. appreciates the National Natural Science Foundation of China (21571061); J.Z. and S.D. were supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division.

语种：英文

外文关键词：colloids; gold; heterogeneous catalysis; surface-bound surfactant; thermal annealing

摘要：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 N-2 flow, 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.