Journal
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
Volume 94, Issue 1, Pages 89-93Publisher
WILEY-BLACKWELL
DOI: 10.1002/cjce.22349
Keywords
Pt; amorphous alloy; microemulsion; hydrogenation; m-chloronitrobenzene
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Funding
- National Natural Science Foundation of China [21276048]
- Education Department of Heilongjiang Province [12541060]
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Pt-B/Al2O3 catalysts were prepared through chemical reduction of platinum ions with borohydride in a water/oil (W/O) microemulsion system comprising cetyltrimethyl ammonium bromide (CTAB), n-butanol, cyclohexane, and H2PtCl6 solution. Transmission electron microscope (TEM) and selected-area electron diffraction (SAED) analyses show that the active Pt particles on the catalysts are uniformly distributed as a Pt-B amorphous alloy. We studied the effects of microemulsion composition, reduction conditions, and preparation methods on the catalysts applied into m-chloronitrobenzene (m-CNB) hydrogenation. We also investigated the kinetics of m-CNB hydrogenation. The catalyst prepared via a single-microemulsion method exhibited much higher activity and even higher selectivity than that prepared with the aqueous solution method. Finally, we propose the mechanism for Pt-B effects on the catalytic performance of Pt-B/Al2O3 in m-CNB hydrogenation.
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