Abstract
We have developed a facile three-step fabricating procedure whereby uniformly dispersed and highly catalytically active PtPd bimetal nanoparticles (NPs) were tightly tethered to the catalytically active and superparamagnetic CuFe2O4 submicrospheres. The obtained CuFe2O4@PtPd composite catalyst with core-satellite structure was characterized by TEM, HAADF-STEM, XRD and XPS. For comparison, structurally similar CuFe2O4@Pt and CuFe2O4@Pd were also prepared by the same method. Their catalytic properties for reduction of p-nitrothiophenol (p-NTP) by NaBH4 were comparatively studied and the enhanced catalytic mechanism was tentatively explained. The results indicate that the inherent catalytic activity of CuFe2O4 can be obviously heightened when Pt, Pd and PtPd alloy NPs are attached to its surface, respectively. However, the catalytic performance of CuFe2O4@PtPd is enhanced more prominently than that of CuFe2O4@Pt and CuFe2O4@Pd. The significantly enhanced activity by loading PtPd NPs compared to that by loading Pt or Pd NPs is mainly attributed to: (1) PtPd NPs with smaller size are uniformly and strongly bound to the CuFe2O4 and effectively boost their synergistic catalysis. (2) The electronic coupling effect in PtPd alloy NPs may play a more important part in enhancing the catalytic activity.
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Acknowledgements
This work is supported by the Natural Science Foundation of Shaanxi Province (No. 2018JM2032) and the Key Research and Development Program of Shaanxi Province (No. 2020ZDLGY11-02).
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Ma, J., Liu, Y., Du, Q. et al. PtPd alloy nanoparticles supported on CuFe2O4 submicrospheres with enhanced synergistic catalysis for reduction of p-nitrothiophenol. J Mater Sci 57, 18827–18838 (2022). https://doi.org/10.1007/s10853-022-07770-z
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DOI: https://doi.org/10.1007/s10853-022-07770-z