- #26
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The previous article I cited had a similar critical response in the literature... silence. Perhaps because this thread is seen as a backwater by the respectable fellows.
So I am going to ponder a little... why does palladium have such a unique affinity to hydrogen? I am drawn to its electron configuration... 2-8-18-18-0 lifted from...
http://www.chemicalelements.com/show/electronconfig.html
Palladium seems quite unusual amongst the metals in its abscence of outer s shell electrons... which I believe the above site recognises by stating the 5s orbital is empty (0) whereas empty orbital in other entries are simply omitted.
My understanding of the adsorption of hydrogen into palladium is that surface defects on the lattice are critical and that palladium has an abundance of these. (3 defects need to coalesce as I believe latest research suggests) Repetative cycling of hydrogen loading/unloading leads to large cracks being formed in the lattice... so this notion doesn't seem to far fetched to me. Furthermore the abundance of surface defects seems a reasonable corollary of the empty 5s orbits... in a hand waving way.
Am I mistaken? Is this the reason why Palladium adsorbs hydrogen so readily?
So I am going to ponder a little... why does palladium have such a unique affinity to hydrogen? I am drawn to its electron configuration... 2-8-18-18-0 lifted from...
http://www.chemicalelements.com/show/electronconfig.html
Palladium seems quite unusual amongst the metals in its abscence of outer s shell electrons... which I believe the above site recognises by stating the 5s orbital is empty (0) whereas empty orbital in other entries are simply omitted.
My understanding of the adsorption of hydrogen into palladium is that surface defects on the lattice are critical and that palladium has an abundance of these. (3 defects need to coalesce as I believe latest research suggests) Repetative cycling of hydrogen loading/unloading leads to large cracks being formed in the lattice... so this notion doesn't seem to far fetched to me. Furthermore the abundance of surface defects seems a reasonable corollary of the empty 5s orbits... in a hand waving way.
Am I mistaken? Is this the reason why Palladium adsorbs hydrogen so readily?