Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 49, Pages 33635-33641Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b11210
Keywords
Rh nanoassemblies; nanosheets; catalytic activity; hydrogen generation; ammonia borane
Funding
- National Natural Science Foundation of China [21473111]
- Natural Science Foundation of Shaanxi Province [2015JM2043]
- Fundamental Research Funds for the Central Universities [GK201602002, 2016TS063]
- Innovation Funds of Graduate Programs at Shaanxi Normal University [2015CXS048]
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Ultrathin noble metal nanosheets with atomic thickness exhibit abnormal electronic, surfacial, and photonic properties due to the unique two-dimensional (2D) confinement effect, which have attracted intensive research attention in catalysis/electrocatalysis. In this work, the well-defined ultrathin Rh nanosheet nanoassemblies with dendritic morphology are synthesized by a facile hydrothermal method with assistance of poly(allylamine hydrochloride) (PAH), where PAH effectively acts as the complexant and shape-directing agent. Transmission electron microscopy and atomic force microscopy images reveal the thickness of 2D Rh nanosheet with (111) planes is only ca. 0.8-1.1 nm. Nitrogen adsorption- desorption measurement displays the specific surface area of the as-prepared ultrathin Rh nanosheet nanoassemblies is 139.4 m(2) g(-1), which is much bigger than that of homemade Rh black (19.8 m(2) g(-1)). Detailed catalytic investigations display the as-prepared ultrathin Rh nanosheet nanoassemblies have nearly 20.4-fold enhancement in mass-activity for the hydrolysis of ammonia borane as compared with homemade Rh black.
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