Palladium hydride

Palladium hydride is <a href="/facts/Palladium/AXMwDFxs">palladium</a> metal with <a href="/facts/Hydrogen/BoYHjl0J">hydrogen</a> within its <a href="/facts/Crystal_lattice/7gQKTsXk">crystal lattice</a>. Despite its name, it is not an ionic <a href="/facts/Hydride/v2rlBGMg">hydride</a> but rather an <a href="/facts/Alloy/I7w7WQWR">alloy</a> of palladium with <a href="/facts/Metallic_hydrogen/Wc4P3R6I">metallic hydrogen</a> that can be written PdHx. At room temperature, palladium hydrides may contain two crystalline phases, α and β (also called α′). Pure α-phase exists at x < 0.017 while pure β-phase exists at x > 0.58; intermediate values of x correspond to α–β mixtures.
Hydrogen absorption by palladium is reversible and therefore has been investigated for <a href="/facts/Hydrogen_storage/KPqx6qNG">hydrogen storage</a>. Palladium electrodes have been used in some <a href="/facts/Cold_fusion/UCwaDp88">cold fusion</a> experiments, under the theory that hydrogen can be "squeezed" between palladium atoms to help it fuse at lower temperatures than normal.

Palladium hydride open-in-new

Palladium hydride