Spectroscopic study of low-temperature hydrogen absorption in palladium

Journal Article · Mon Jan 12 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4905729· OSTI ID:22399092

Takata, H.; Onishi, Y.; Inagaki, Y.; Kawae, T. ^[1]; Tsujii, H. ^[2]; Kimura, T. ^[3]

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1. Department of Applied Quantum Physics, Faculty of Engineering, Kyushu University, Motooka, Nishi-Ku, Fukuoka 819-0395 (Japan)
2. Department of Physics, Faculty of Education, Kanazawa University, Kakuma-machi, Kanazawa 920-1192 (Japan)
3. Department of Physics, Kyushu University, Hakozaki, Higashi-Ku, Fukuoka 812-8581 (Japan)

We report real-time detection of hydrogen (H) absorption in metallic palladium (Pd) nano-contacts immersed in liquid H{sub 2} using inelastic electron spectroscopy (IES). After introduction of liquid H{sub 2}, 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.

• OSTI ID: 22399092
• Journal Information: Applied Physics Letters, Vol. 106, Issue 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ATOMS
DENSITY
ELECTRIC POTENTIAL
ELECTRON SPECTROSCOPY
HYDRIDES
HYDROGEN
LIQUIDS
PALLADIUM
SOLIDS
SURFACES
TUNNEL EFFECT