X-ray Absorpton Spectroscopy Study on Hydrogen Recombination Catalysts of Palladium Nanoparticles on Titanium Oxide under Wet Condition

Hydrogen recombination catalyst is useful tool for reducing hydrogen in closed area. The catalyst is known to be poisoned under wet condition in long time use. The study is focused on the behavior of pre-oxidized Pd nanoparticle as the hard-used catalyst in high humidity environment by comparison of alumina and titanium oxide supports using in situ X-ray absorption spectroscopy technique. The reduction of surface oxide layer of Pd/TiO2 was promoted by water during hydrogen recombination, although the reduction reaction of Pd/Al2O3 was inhibited by water.