文献类型：期刊文献

英文题名：Design of Highly Efficient Pt-SnO2 Hydrogenation Nanocatalysts using Pt@Sn Core-Shell Nanoparticles

作者：Liu, Miaomiao[1,2,3];Tang, Weiqiang[1,2];Xie, Zhaohui[3];Yu, Hongbo[1,2,3];Yin, Hongfeng[3];Xu, Yisheng[1,2];Zhao, Shuangliang[1,2];Zhou, Shenghu[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, 1219 Zhongguan West Rd, Ningbo 315201, Zhejiang, Peoples R China

年份：2017

卷号：7

期号：3

起止页码：1583

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20173204036670);WOS:【SCI-EXPANDED(收录号:WOS:000395726500009)】；

基金：S. Zhou and H. Yin acknowledge the programs of the Ningbo Municipal Science and Technology Innovative Research Team (Grant Nos. 2014B81004 and 20161310005). This work was also supported by the National Natural Science Foundation of China (Grant Nos. 21571183, 91434110, and 21676089).

语种：英文

外文关键词：nanocatalysts; Pt-SnO2; hydrogenation; core@shell; nitroaromatics

摘要：In this work, Pt-SnO2 heteroaggregate nano catalysts were synthesized by in situ transformation of Pt@Sn core-shell nanoparticles and their catalytic performance for hydrogenation of various substituted nitroaromatics was investigated. The Pt@Sn nanoparticles were prepared by a one-step method, and the alumina-supported Pt@Sn nano particles were further transformed in situ into Pt-SnO2 heteroaggregate nanostructures by calcination. The structures of Pt@Sn and Pt-SnO2 nanomaterials were characterized, and FT-IR with CO probes, HRTEM, XRD, and XPS characterizations revealed that the as-synthesized Pt@Sn nanoparticles were core@shell-like structures with Sn-rich shells and Pt-rich cores and the obtained Pt-SnO2 heteroaggregate nanostructures consisted of close-contact pure Pt and SnO2 phases. The Pt-SnO2/Al2O3 nanostructures demonstrated a better catalytic performance for hydrogenation of various substituted nitroaromatics relative to individual Pt/Al2O3 nanocatalysts. Theoretical calculations suggested that Pt-SnO2 nanocatalysts can slightly facilitate the adsorption of H-2 and o-chloronitrobenzene and strongly weaken the binding of Pt/o-chloroaniline, resulting in more available reactants and easier release of products from the catalyst surfaces. The theoretical calculations indicated that the enhanced catalytic performance may originate from a cooperative interaction between Pt and SnO2.