Reaction of carbon monoxide with water on supported iridium catalysts

摘要: Abstract The adsorption of CO, the interaction and reaction CO water have been investigated over supported Ir catalysts. was studied by infrared spectroscopy. dominant spectral features for Ir/Al2O3 at 298 K are bands 2090, 2060, 2018 cm−1 but on Ir/TiO2, Ir/SiO2, Ir/MgO only a band 2060–2075 detected. At higher temperature above 473 induces agglomeration Ir, H2O hindered this process. In in water, formate formation observed surface IR spectra adsorbed presence differed from that during CO; due to linearly bonded shifted lower wavenumbers. + fixed-bed continuous-flow reactor. production H2, CO2 (with ratio about 1) small amount hydrocarbons proceeded readily 523 K. Ir/TiO2 found be most effective catalyst, its activity 20 times than last Ir/SiO2. Possible mechanisms discussed.