N2O decomposition properties of Ru catalysts supported on various oxide materials and SnO2
Satoshi Hinokuma, Takeshi Iwasa, Yoshihiro Kon, Tetsuya Taketsugu, Kazuhiko Sato
Abstract
Abstract Nitrous oxide (N 2 O) is a stratospheric ozone depleting greenhouse gas that has global warming potential. As the catalytic decomposition of N 2 O is one of the most promising techniques for N 2 O emissions abatement, in this study, for this purpose the properties of Ru supported on various oxide materials were investigated under excess O 2 conditions, and the identities of the N 2 O adsorption species on the catalysts were confirmed. To clarify the correlation between the catalytic properties and N 2 O decomposition activity, the supported Ru catalysts were characterised by means of powder X-ray diffraction, X-ray fluorescence measurements, energy-dispersive X-ray mapping and several gas sorption techniques. The results showed that the redox properties for Ru (RuO 2 ) at low temperature are closely associated with N 2 O decomposition activity. The local structures, optimal Ru loading and N 2 O adsorption species of the novel Ru/SnO 2 catalysts were studied and they showed high activity for N 2 O decomposition.