On the structure and activity of a Pt/C catalyst subjected to repeated deactivation and regeneration cycles |
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| Authors: | E Czárán O V Bragin M Dobrovolszky Z Karpinskii Z Paál and P Tétényi |
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| Institution: | (1) Institute of Isotopes of the Hungarian Academy of Sciences, P.O.B. 77, H-1525 Budapest;(2) Central Research Institute for Chemistry of the Hungarian Academy of Sciences, P.O.B. 17, H-1525 Budapest;(3) Present address: Academy of Sciences, Zelinskii Institute of Organic Chemistry of the USSR, Leninskii pr. 47, Moscow;(4) Present address: Institute of Physical Chemistry of the Polish Academy of Sciences, u. Kasparzaka 44/52, Warsaw |
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| Abstract: | Electron microscopic studies reveal that repeated air/hydrogen regeneration cycles cause irreversible structural changes of a Pt/C catalyst involving sintering and migration of the platinum over the support. This is reflected by a serious decrease of the catalytic activity. With hydrogen treatment only, these effects are less significant.
                       ,    /  Pt/C,   .    .   .
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