文献类型：期刊文献

英文题名：Structural Identification and Enhanced Catalytic Performance of Alumina-Supported Well-Defined Rh-SnO2 Close-Contact Heteroaggragate Nanostructures

作者：Xu, Caiyun[1];Li, Qi[1];Zhang, Qiuyang[1];Li, Kaijie[1];Yin, Hongfeng[2];Zhou, Shenghu[1]

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

年份：2019

卷号：2

期号：8

起止页码：5086

外文期刊名：ACS APPLIED NANO MATERIALS

收录：;EI(收录号：20193407328776);WOS:【SCI-EXPANDED(收录号:WOS:000483440400045)】；

基金：S.Z. and H.Y. thank the National Natural Science Foundation of China for financial support (Grant Nos. 21776090 and 21571183), and this work is also partially supported by Industrial R&D Foundation of Ningbo (Grant No. 2017B10040).

语种：英文

外文关键词：core-shell; heteroaggregates; Rh-SnO2; synergistic effect; hydrogenation

摘要：This work illustrates direct evidence of the formation of close-contact Rh-SnO2 heteroaggregate interfaces, and their enhanced catalytic hydrogenation performance is also demonstrated. Alumina-supported Rh-SnO2 heteroaggregate nanocatalysts were prepared by in situ transformation of Rh@Sn core-shell nanostructures. Various characterization techniques, especially the studies of high angle annular dark field scanning transition electron microscopy with phase mappings, confirm that Rh-SnO2 close-contact heteroaggragate nanostructures were obtained by in situ calcination and following reduction of Rh@Sn core-shell nanoparticle precursors. The catalytic studies for hydrogenations of various substituted nitroaromatics show that the Rh-SnO2/Al2O3 heteroaggregate nanocatalysts not only improve the catalytic conversions but also enhance the catalytic selectivity. The combination of characterization and catalytic studies suggests that a synergistic effect originated from close-contact Rh-SnO2 heteroaggregate interfaces exists in the Rh-SnO2 system, which enhances their catalytic hydrogenation performance.