Spectroscopic study of low-temperature hydrogen absorption in palladium

K. Ienaga, H. Takata, Y. Onishi, Y. Inagaki, H. Tsujii, T. Kimura, T. Kawae

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We report real-time detection of hydrogen (H) absorption in metallic palladium (Pd) nano-contacts immersed in liquid H2 using inelastic electron spectroscopy (IES). After introduction of liquid H2, the spectra exhibit the time evolution from the pure Pd to the Pd hydride, indicating that H atoms are absorbed in Pd nano-contacts even at the temperature where the thermal process is not expected. The IES time and bias voltage dependences show that H absorption develops by applying bias voltage 30 ∼ 50 mV, which can be explained by quantum tunneling. The results represent that IES is a powerful method to study the kinetics of high density H on solid surface.

Original languageEnglish
Article number021605
JournalApplied Physics Letters
Issue number2
Publication statusPublished - Jan 12 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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