Abstract
Polyvinylpyrrolidone (PVP)-stabilized Pt colloidal catalysts with hydrazine hydrate as a reductant were prepared in an H2PtCl6 water solution/PVP/n-butanol microemulsion system. With m-chloronitrobenzene (m-CNB) selective hydrogenation as a probe, we studied how the microemulsion composition as well as the reduction conditions would affect the hydrogenation performance of PVP-Pt. The effects of rare earth ions on the modification of PVP-Pt were further studied. The as-prepared PVP-Pt improved the m-CNB hydrogenation activity and significantly enhanced the reactive selectivity compared with the ethanol reflux method. The addition of a small amount of Pr3+-modified PVP-Pt/Pr (Pt:Pr molar ratio of 1:0.14) further improved the activity of the catalyst.
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Acknowledgments
The authors acknowledge the financial supports from the National Natural Science Foundation of China (21276048), the Education Department of Heilongjiang Province (12541060), and the Youth Foundation of Northeast Petroleum University (2013NQ112).
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Li, F., Cao, B., Ma, R. et al. Polyvinylpyrrolidone-stabilized Pt colloidal catalysts in chloronitrobenzene hydrogenation and modification with rare earth ions. Reac Kinet Mech Cat 116, 479–489 (2015). https://doi.org/10.1007/s11144-015-0907-3
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DOI: https://doi.org/10.1007/s11144-015-0907-3