Real-time detection of hydrogen absorption and desorption in metallic palladium using vibrating wire method

Abstract

A vibrating wire (VW) method was applied to investigate the hydrogen absorption and desorption properties of palladium. At room temperature, a considerable shift in resonance frequency was successfully observed in VW spectra under H2 gas exposure. The shift is reversible in the initial stage of the exposure and is attributed to changes in the density and Young’s modulus of the VW sensor. Irreversibility of the shift because of embrittlement is detected after a sufficient exposure time. H absorption is slowed down enormously at T = 200 K owing to suppression of the thermal activation process.

Electrosorption of Hydrogen in Pd-Based Metallic Glass Nanofilms

“…This is an undesired way of hydrogen storage because, in this case, the hydrogen is not absorbed electrochemically but rather through physisorption, and cannot be easily desorbed. 52 Moreover, hydrogen embrittlement can occur when unbonded hydrogen remains for a long time in the samples. 17,53 For a study of the structure of the MGTF−Si assembly, detailed TEM investigations were carried out on a cross-section specimen.…”

“…The interface adhesion between the MGTF and Si substrate is a crucial factor for the MGTF–Si assembly because hydrogen can easily penetrate through the sample and accumulate at the interface. This is an undesired way of hydrogen storage because, in this case, the hydrogen is not absorbed electrochemically but rather through physisorption, and cannot be easily desorbed . Moreover, hydrogen embrittlement can occur when unbonded hydrogen remains for a long time in the samples. , For a study of the structure of the MGTF–Si assembly, detailed TEM investigations were carried out on a cross-section specimen.…”

In situ Magnetization Measurement of Superconducting Transition in PdH0.82and PdD0.79Prepared by Low-Temperature Absorption

“…We have studied H absorption process into metals much lower than room temperature using in-situ measurements, demonstrating that the low temperature H absorption method is quite useful to explore the quantum behavior of H in metal-hydrides. 24,25) According to Akiba et al, PdH 0.83 is prepared even in the H 2 gas pressure of ∼ 0.1 MPa when the H absorption is done at T = 210 K. 28) This suggests that PdH(D) x with x ≥ 0.8 can be prepared at low temperature, enabling to investigate the superconducting properties through in-situ measurements. In this Letter, we propose a new procedure to study the superconductivity of PdH(D) x using a simple setup with a gentle experimental condition, and demonstrate the efficacy of the procedure.…”