Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 511 - 520 (1988)
Update date:2022-08-29
Topics:
Kondo, Junko
Abe, Hiroshi
Sakata, Yoshihisa
Maruya, Ken-ichi
Domen, Kazunari
Onishi, Takaharu
The adsorption and reaction of H2, CO, CO2, OH(a) + CO(g) and CO2(a) + H2(g) have been studied in detail by infrared spectroscopy.Hydrogen is dissociatively adsorbed to form the OH and the Zr-H species and CO is weakly adsorbed as the molecular form.The infrared spectrum of adsorbed species of CO2 over ZrO2 shows three main bands at ca. 1550, 1310 and 1060 cm-1 which can be assigned to the bidentate carbonate species.The reaction of OH(a) + CO(g) at 373 K gave rise to formate and bidentate carbonate species, and after having introduced hydrogen onto this system at 473 K, methoxide species appeared.When hydrogen was introduced over CO2-preadsorbed ZrO2, formate and methoxide species also appeared.It is concluded that the formation of the formate and methoxide species results from the hydrogenation of bidentate carbonate species.
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