Spectroscopic study of low-temperature hydrogen absorption in palladium

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

doi:10.1063/1.4905729

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 journal › Article › peer-review

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Abstract

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 language	English
Article number	021605
Journal	Applied Physics Letters
Volume	106
Issue number	2
DOIs	https://doi.org/10.1063/1.4905729
Publication status	Published - Jan 12 2015

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4905729

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title = "Spectroscopic study of low-temperature hydrogen absorption in palladium",

abstract = "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.",

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T1 - Spectroscopic study of low-temperature hydrogen absorption in palladium

AU - Ienaga, K.

AU - Takata, H.

AU - Onishi, Y.

AU - Inagaki, Y.

AU - Tsujii, H.

AU - Kimura, T.

AU - Kawae, T.

PY - 2015/1/12

Y1 - 2015/1/12

N2 - 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.

AB - 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.

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