Effect of Cold Work on Hydrogen Absorption in Pd. I. Deformation and Aging of Pd by Hydrogen Absorption-Desorption Cycles. Deformation of Pd at a Hydrogen Absorption-Desorption Cycle.

Discovery of spontaneous deformation of Pd metal during hydrogen absorption/desorption cycles

A drastic deformation was observed in Pd metal of various shapes after hydrogen absorption and desorption cycles at 150 degrees C at a gas pressure of 1-5 MPa. All of the phenomena observed indicate that some strong internal force is induced spontaneously during hydrogen absorption/desorption cycles to produce a collective deformation so as to minimize the surface.

Study on Structural Change of Pd Nanoparticles with Hydrogen Absorption/Desorption Process

KINETICS OF HYDROGEN ABSORPTION BY CHEMICALLY MODIFIED Pd( 110) *

The kinetics of hydrogen absorption by Pd(ll0) have been measured as a function of impurity sulfur coverage on the metal surface. In contrast to results obtained on the clean surface in which the absorption process was found to be rate-limited by the diffusion of atomic hydrogen into the bulk, submonolayer coverages of sulfur cause the kinetics to become surface dominated with the dissociative ...

Hydrogen Absorption Property of Pd-Doped Porous Materials

In electrochemical loading of Pd with deuterium, it has been known that attaining a D/Pd value larger than 0.88 is necessary for triggering excess heat effects [1]. It has been reported by Arata and Zhang that the heat arising from D-D nuclear fusion reaction in solid is observed simply by pressurizing nano-Pd/ZrO2 system with deuterium gas [2]. It seems that nano-scale Pd particles absorb more...

Hydrogen Adsorption and Absorption with Pd−Au Bimetallic Surfaces

Pd−Au bimetallic catalysts have shown promising performance in numerous reactions that involve hydrogen. Fundamental studies of hydrogen interactions with Pd−Au surfaces could provide useful insights into the reaction mechanisms over Pd−Au catalysts, which may, in turn, guide future catalyst design. In this study, the interactions of hydrogen (i.e., adsorption, absorption, diffusion, and desorp...