Synchrotron radiation-stimulated desorption from Pd or Pd/TiZrV coated copper tubes

Gas desorption from copper tubes coated with Pd or Pd/TiZrV in response to synchrotron radiation was investigated. Following activation (250 degrees C for 4 h), Pd/TiZrV film exhibited H2 desorption yield that was over one order of magnitude lower than that from TiZrV film. The Pd and Pd/TiZrV films also desorbed smaller amount of CO and CO2 during exposure. Compared to the TiZrV film, the Pd film exhibited a higher H2 pumping rate and was more likely to release H2 and CO during activation. These characteristics are considered to have reduced the photon-stimulated desorption yield of the Pd layer.

Automated summary

Gas desorption from copper tubes coated with Pd or Pd/TiZrV in response to synchrotron radiation was investigated. The results showed that Pd/TiZrV film exhibited lower H2 desorption yield compared to TiZrV film. Pd film had a higher H2 pumping rate and was more likely to release H2 and CO during activation, which reduced the photon-stimulated desorption yield of the Pd layer.