The state of palladium in the nanosized hydrogenation catalysts modified with elemental phosphorus |
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| Authors: | L B Belykh N I Skripov V V Akimov V L Tauson T P Stepanova F K Schmidt |
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| Institution: | 1. Irkutsk State University, ul. K. Marksa 1, Irkutsk, 664003, Russia
2. Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia
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| Abstract: | The size, nature, and surface state of nanoparticles formed by reduction of Pd(acac)2 with hydrogen in the presence of P4 have been elucidated by means of X-ray photoelectron spectroscopy, X-ray powder diffraction analysis, and transmission electron microscopy. The nanoparticles (average diameter of 5.6 nm) consist of Pd6P and palladium nanoclusters (at initial ratio P/Pd = 0.3). Dimethylammonium dihydro- and hydrophosphates are found in the surface layer of the catalyst nanoparticles. The nanoparticles are stabilized by ammonium salts formed via dimethylformamide hydrolysis. |
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