Abstract
Platinum nanoparticles, synthesized via ethanol reduction of hexachloroplatinic acid in the presence of poly-(N-vinyl-2-pyrrolidone), were anchored on magnesium aluminate spinel using a colloidal deposition method. The samples were characterized using the following methods: transmission electron microscopy, powder X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The results revealed that platinum nanoparticles, with an average diameter of 2.8 nm, are homogenously dispersed on the surface of the carrier. Under very mild conditions, supported Pt/MgAl2O4 catalysts demonstrated excellent catalytic activity and high selectivity in the hydrogenation reaction of benzaldehydes to benzyl alcohols. The reaction kinetics for the catalytic hydrogenation of 3-phenoxybenzaldehyde to 3-phenoxybenzyl alcohol on a Pt/MgAl2O4 catalyst can be described by equation \( r = k \times c^{1.44} \times p_{{{\text{H}}_{ 2} }} \), and the apparent activation energy is 35.6 kJ mol−1.
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The authors gratefully appreciate the financial support of the National Natural Science Foundation of China (20673075 and 50973077) and the Natural Science Foundation of Jiangsu Province (BK2010209).
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Han, M., Zhang, H., Du, Y. et al. Catalytic hydrogenation of benzaldehydes over platinum nanoparticles immobilized on magnesium aluminate spinel under mild conditions. Reac Kinet Mech Cat 102, 393–404 (2011). https://doi.org/10.1007/s11144-010-0266-z
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DOI: https://doi.org/10.1007/s11144-010-0266-z