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Issue 32, 2012
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Enhanced hydrogenation activity of nano-sized Pd–Ni bimetal particles on Ti-containing mesoporous silica prepared by a photo-assisted deposition method

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Abstract

A facile photo-assisted deposition (PAD) for the synthesis of highly dispersed and small Pd–Ni bimetal nanoparticles with a narrow size distribution has been developed by combining mesoporous silica materials including a single-site Ti-oxide moiety (Ti-HMS) as a promising photo-responsive catalyst support. Under UV-light irradiation, both Pd and Ni precursors can be deposited directly on the photo-excited tetrahedrally coordinated Ti-oxide moiety within the silica frameworks, and subsequently reduced with H2 to generate the nano-sized Pd–Ni bimetal particles. Compared with individual Pd or Ni-loaded Ti-HMS (Pd or Ni/Ti-HMS) prepared by PAD and PdNi/Ti-HMS prepared by the conventional impregnation (Imp) technique, the PdNi/Ti-HMS prepared by PAD showed a strong synergistic effect in the catalytic hydrogenation of nitrobenzene (NB) to aminobenzene (AB). It was also found that the hydrogenation activity reached a maximum at the molar ratio of Ni/Pd = 1.5, while further increases in Ni loading amount gradually decreased the catalytic activity.

Graphical abstract: Enhanced hydrogenation activity of nano-sized Pd–Ni bimetal particles on Ti-containing mesoporous silica prepared by a photo-assisted deposition method

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Publication details

The article was received on 14 Mar 2012, accepted on 06 Jun 2012 and first published on 27 Jun 2012


Article type: Paper
DOI: 10.1039/C2JM31584J
Citation: J. Mater. Chem., 2012,22, 16243-16247
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    Enhanced hydrogenation activity of nano-sized Pd–Ni bimetal particles on Ti-containing mesoporous silica prepared by a photo-assisted deposition method

    K. Fuku, T. Sakano, T. Kamegawa, K. Mori and H. Yamashita, J. Mater. Chem., 2012, 22, 16243
    DOI: 10.1039/C2JM31584J

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