Cover Picture: Oxidation of Rh/Ce0.5Zr0.5O2 Reduced under Mild Conditions as an Initiator of n-Butane Oxidative Reforming at Ambient Temperature (ChemSusChem 11/2009)



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The cover image shows the initiation of oxidative reforming (OR) of n-butane to produce H2 and CO over a Rh/Ce0.5Zr0.5O2 catalyst cooled in an ice bath. The catalyst generates heat internally though oxidation of the Ce0.5Zr0.5O2−x support, and is immediately heated above the catalytic autoignition temperature of n-butane combustion, which eventually drives OR. In their communication on page 1032, Katsutoshi Nagaoka, Katsutoshi Sato, Yusaku Takita, and co-workers from Oita University show that Rh/Ce0.5Zr0.5O2 is reduced sufficiently even under mild conditions (i.e., in an H2 atmosphere at 373 K) and in situ during OR, and the oxidation of the resultant catalyst triggers OR at an ambient temperature without any external heat input (even under nonadiabatic conditions). This research is considered to represent an innovative step in the development of self-sufficient reforming systems for a new generation of fuel cell application.