A facile surfactant-free synthesis of Rh flower-like nanostructures constructed from ultrathin nanosheets and their enhanced catalytic properties

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• 作者：Yaqi Jiang ; Jingyun Su ; Yanan Yang ; Yanyan Jia ; Qiaoli Chen ; Zhaoxiong Xie…
• 关键词：rhodium ; nanocrystal ; nanosheet ; hydrogenation reaction
• 刊名：Nano Research
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：9
• 期：3
• 页码：849-856
• 全文大小：1,311 KB
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• 作者单位：Yaqi Jiang (1)
  Jingyun Su (1)
  Yanan Yang (1)
  Yanyan Jia (1)
  Qiaoli Chen (1)
  Zhaoxiong Xie (1)
  Lansun Zheng (1)
  
  1. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chinese Library of Science
  Chemistry
  Nanotechnology
  
• 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
• ISSN：1998-0000

文摘

Rh is an important catalyst that is widely used in a variety of organic reactions. In recent years, many efforts have focused on improving its catalytic efficiency by fabricating catalyst nanoparticles with controlled size and morphology. However, the frequently employed synthesis route using organic compounds either as the reaction medium or capping agent often results in residual molecules on the catalyst surface, which in turn drastically diminishes the catalytic performance. Herein, we report a facile, aqueous, surfactant-free synthesis of a novel Rh flowerlike structure obtained via hydrothermal reduction of Rh(acac)₃ by formaldehyde. The unique Rh nanoflowers were constructed from ultrathin nanosheets, whose basal surfaces comprised {111} facets with an average thickness of ~1.1 nm. The specific surface area measured by CO stripping was 79.3 m2·g−1, which was much larger than that of commercial Rh black. More importantly, the Rh nanoflower catalyst exhibited excellent catalytic performance in the catalytic hydrogenation of phenol and cyclohexene, in contrast to the commercial Rh black and polyvinyl pyrrolidone (PVP)-capped Rh nanosheets exposed by similar {111} basal surfaces.