期刊
ACS APPLIED NANO MATERIALS
卷 2, 期 8, 页码 5086-5095出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.9b01000
关键词
core-shell; heteroaggregates; Rh-SnO2; synergistic effect; hydrogenation
资金
- National Natural Science Foundation of China [21776090, 21571183]
- Industrial R&D Foundation of Ningbo [2017B10040]
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.
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