A facile, surfactant-free synthesis of Rh flowerlike nanostructure was developed by hydrothermal reduction of Rh(acac)3 with formaldehyde. The unique Rh nanoflowers were constructed from ultrathin nanosheets with specific surface area of 79.3 m2g−1, which was much larger than that of commercial Rh black. The Rh nanoflowers exhibited excellent catalytic performance in the catalytic hydrogenation of phenol and cyclohexene, in contrast to the commercial Rh black.
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