文献类型：期刊文献

英文题名：A Sacrificial Coating Strategy Toward Enhancement of Metal-Support Interaction for Ultrastable Au Nanocatalysts

作者：Zhan, Wangcheng[1,2,3];He, Qian[4,6,7];Liu, Xiaofei[1,2,3];Guo, Yanglong[1,2];Wang, Yanqin[1,2];Wang, Li[1,2,3];Guo, Yun[1,2];Borisevich, Albina Y.[4];Zhang, Jinshui[3];Lu, Guanzhong[1,2];Dai, Sheng[3,5]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Res Inst Ind Catalysis, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA;[4]Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA;[5]Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA;[6]Cardiff Univ, Cardiff Catalysis Inst, Cardiff CF10 3AT, S Glam, Wales;[7]Cardiff Univ, Sch Chem, Cardiff CF10 3AT, S Glam, Wales

年份：2016

卷号：138

期号：49

起止页码：16130

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20165103151835);WOS:【SCI-EXPANDED(收录号:WOS:000389962800052)】；

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 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. Q.H. and A.Y.B were supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, and through a user project supported by the Oak Ridge National Laboratory (ORNL) Center for Nanophase Materials Sciences, sponsored by the Scientific User Facilities Division, Office of Science, Basic Energy Sciences, U.S. Department of Energy. J.Z. and S.D. thank Dr. C. Abney (ORNL) for his helpful suggestions.

语种：英文

外文关键词：Metals - Stabilization - Carbon - Catalyst supports - Sintering - Catalyst activity - Catalytic oxidation - Nanocatalysts - Metal nanoparticles - Coatings - Atmospheric temperature - Combustion - Thermooxidation

摘要：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 nano catalysts.