Chemisorption of hydrogen on ultrathin Pd films on Mo (100)

John M. Heitzinger, Steven C. Gebhard, Bruce E. Koel

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The H2 adsorption properties of ultrathin Pd films deposited on Mo(100) have been studied with Auger electron spectroscopy (AES) and temperature-programmed desorption (TPD). The pseudomorphic monolayer of Pd on Mo(100) has a greatly reduced H2 uptake capacity at 150 K compared to bulk Pd. Desorption from the Pd monolayer occurs from a chemisorption state with a desorption temperature of about 290 K. Thicker Pd films also have a reduced H2 uptake, until θPd≥5.5. H2 desorption from the low-temperature hydride state that is characteristic of bulk Pd only occurs for Pd films with θPd≥5.5.

Original languageEnglish (US)
Pages (from-to)65-70
Number of pages6
JournalChemical Physics Letters
Issue number1-2
StatePublished - Nov 27 1992

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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