Abstract
Gas desorption from copper tubes coated with Pd or Pd/TiZrV in response to synchrotron radiation was investigated. Following activation (250 °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.
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