The Pt/Pd/Fe trimetallic nanoparticle (Pt/Pd/Fe T-NP)
was prepared using a water-in-oil microemulsion system of water/AOT/isooctane
at room temperature. This nanoparticle (NP) was physically characterized
by field emission scanning electron microscopy (FE-SEM), transmission
electron microscopy (TEM), X-ray diffraction (XRD), and X-ray fluorescence
(XRF) analyses. The said NP was used as catalyst for hydrodehalogenation
(HDH) of halogenated organic compounds (HOCs), and its capability
in hydrodechlorination (HDC) of chlorobenzene was compared with Pt/Pd,
Pt/Fe, and Pd/Fe bimetallic nanoparticles (B-NPs) synthesized via
the same method. The formation of mixed Pt/Pd/Fe ensembles results
in an enhanced overall activity and reusability of HDC reaction, compared
with Pd/Fe catalyst which acted as the best B-NP. Recycling experiments
were examined for HDC of chlorobenzene. To get a maximum conversion
of HDC, the reaction parameters like the effect of solvent, amounts
of catalyst and ammonium formate were optimized. According to the
results, HOCs, including electron-withdrawing and electron-donating
substrates, were reduced smoothly. Finally, a mechanism for HDH reaction
on the Pt/Pd/Fe catalyst surface was proposed.
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