The water-gas-shift reaction over Ir/TiO2 and Ir–Re/TiO2 catalysts

Yasushi Sato, Yoshinori Soma, Toshihiro Miyao, Shuichi Naito

doi:10.1016/j.apcata.2006.02.022

The water-gas-shift reaction over Ir/TiO2 and Ir–Re/TiO2 catalysts

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書誌事項

公開日: 2006-05

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DOI

10.1016/j.apcata.2006.02.022

公開者: Elsevier BV

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説明

Abstract Water-gas-shift reactions over Ir/TiO 2 and Ir–Re/TiO 2 catalysts were studied, employing a closed gas circulation system. Addition of Re to Ir/TiO 2 catalysts clearly accelerated the WGS reaction, as is in the cases of our previous study over Pt/TiO 2 and Pd/TiO 2 catalysts. The FT-IR analyses of the adsorbed species during the reaction exhibited the enhancement of the adsorbed CO peaks in the lower wavenumber region with the increase of Re content. These peaks are supposed to be the adsorbed CO neighboring to the adsorbed OH function, which was formed by the dissociation of water on the Re metal or ReO x species of Ir–Re/TiO 2 catalysts.