CO-induced changes in structure of supported rhenium

摘要: The interaction of CO with highly reduced Re/Al{sub 2}O{sub 3} was investigated at 100-673 K by means infrared spectroscopy. adsorption 100 produced absorption bands characteristic linearly and bridge bonded CO. At 200-300 well-observable spectral changes were experienced, their extent depending on the temperature time. formed suggest occurrence CO-induced structural in Re crystallites formation carbonyls higher CO/Re ratios, most probably Re{sub 2}(CO){sub 10}. Further occurred 373-473 K, indicating transformation more complex carbonyl into tricarbonyl. This promoted H{sub 2}O. tricarbonyl from x}-CO species found to be very limited. 56 refs., 10 figs., 1 tab.