Jones and Axil-- The paper Mats identified notes in some detail the effect on nano size particles and how surface effects influence the uptake of hydrogen. Their loading in nano particles seems to occur much quicker than that suggested by the earlier patent. It is suggested that the avalanche phenomena is apart from normal H loading associated with larger lattice structures.
>From reading the Wolf item out of SRL, I do not see any reference to nano >sized Pd particles. Axil, how did you determine that the reference to cluster means the formation of nanoparticles? I think you are jumping to conclusions. Bob Cook From: Axil Axil Sent: Wednesday, January 27, 2016 11:20 AM To: vortex-l Subject: [Vo]:Re: [Vo]:RE: [Vo]:Hydrogen uptake causes molecular “avalanches” in palladium Reference: psc.edu/science/Wolf/Wolf.html Onset of the beta phase in palladium hydride at 300 degrees Kelvin. This phase change occurs as the concentration of hydrogen atoms (yellow) in the palladium (purple) increases. At early stages (the alpha phase), hydrogen atoms randomly populate small interstices in the lattice structure. At a critical point, the lattice expands, allowing hydrogen to cluster at higher density, as visualized here. This image shows the lattice from the (001) direction. The term cluster means the formation of nanoparticles. http://www.psc.edu/science/Wolf/neat3-lg.GIF On Wed, Jan 27, 2016 at 11:18 AM, Jones Beene <[email protected]> wrote: From: Mats Lewan Don’t know if this contains new findings. Might be relevant for Pd+H systems, and maybe also Ni+H systems. "As the hydrogen is taken up over time, there is eventually a sudden reconfiguration of the hydrogen distribution within the lattice, a process colloquially referred to as “avalanching.” " http://www.anl.gov/articles/hydrogen-uptake-causes-molecular-avalanches-palladium Mats, as far back as 1938, achieving this “sudden reconfiguration” of palladium was known and patented. Ironically, it takes a long time to reach the stage of “sudden” which is one reason why results with palladium electrodes are not assured. http://www.google.com.gh/patents/US2139529
