Editing Palladium (section)

===Hydrogen storage===
{{Main|Palladium hydride}}
Palladium readily [[adsorbs]] hydrogen at room temperatures, forming [[palladium hydride]] PdH<sub>x</sub> with x less than 1.<ref>{{cite journal |doi=10.1007/BF02667685 |title=The H-Pd (hydrogen-palladium) System |date=1994 |last1=Manchester |first1=F. D. |last2=San-Martin |first2=A. |last3=Pitre |first3=J. M. |journal=Journal of Phase Equilibria |volume=15 |pages=62–83 |s2cid=95343702}}</ref> While this property is common to many transition metals, palladium has a uniquely high absorption capacity and does not lose its ductility until x approaches 1.<ref name="gr">{{Greenwood&Earnshaw|pages=1150–151}}</ref> This property has been investigated in designing an efficient and safe hydrogen fuel storage medium, though palladium itself is currently prohibitively expensive for this purpose.<ref name="grochala">{{cite journal |last1=Grochala |first1=Wojciech |last2=Edwards |first2=Peter P. |title=Thermal Decomposition of the Non-Interstitial Hydrides for the Storage and Production of Hydrogen |journal=Chemical Reviews |volume=104 |issue=3 |pages=1283–316 |year=2004 |pmid=15008624 |doi=10.1021/cr030691s}}</ref> The content of hydrogen in palladium can be linked to [[magnetic susceptibility]], which decreases with the increase of hydrogen and becomes zero for PdH<sub>0.62</sub>. At any higher ratio, the [[solid solution]] becomes [[diamagnetic]].<ref>Mott, N. F. and Jones, H. (1958) ''The Theory of Properties of metals and alloys''. Oxford University Press. {{ISBN|0-486-60456-X}}. p. 200</ref>

Palladium is used for purification of hydrogen on a laboratory<ref>{{Cite book |url=https://www.worldcat.org/oclc/870962388 |title=Handbook of membrane reactors Vol. 1, Fundamental materials science, design and optimisation |date=2013 |publisher=Woodhead Publishing |editor=Angelo Basile |isbn=978-0-85709-414-8 |location=Cambridge, UK |oclc=870962388}}</ref>{{Rp|pages=183–217}} but not industrial scale.<ref>{{cite book |doi=10.1002/14356007.o13_o04 |chapter=Hydrogen, 3. Purification |title=Ullmann's Encyclopedia of Industrial Chemistry |date=2011 |last1=Häussinger |first1=Peter |last2=Lohmüller |first2=Reiner |last3=Watson |first3=Allan M. |isbn=978-3-527-30385-4}}</ref>