Behavior of Ruthenium Trapped on an Yttria Filter Under Reduction and Oxidation Conditions

Abstract

The behavior of ruthenium (RU) trapped on an yttria filter has been studied under reduction and oxidation atmospheres using a Thermo-Gravimetric Analyzer (TGA), an X-ray Diffractometry analyzer (XRD) and an X-ray Photoelectron Spectroscopy analyzer (XPS). Ruthenium trapped on an yttria filter under an oxidation atmosphere was in the form of Y2Ru2O7 and it was transformed into Ru metal under a reduction atmosphere. Under a re-oxidation atmosphere, the ruthenium trapped on an yttria filter was again Y2Ru2O7. When the ruthenium trapped on an yttria filter was exposed to a reduction atmosphere, a weight loss of 2.5% was noticed at about 350~700°C. When it was exposed to a re-oxidation atmosphere, the ruthenium trapped on an yttria filter showed a weight gain of 2.5% at about 300~800°C.