Palladiumhydridit

Palladiumhydridit are chemical compounds formed between palladium and hydrogen. When palladium metal absorbs hydrogen, it forms a solid solution or hydride phase. The composition of palladium hydride is not fixed and can vary depending on the pressure and temperature of hydrogen. The chemical formula is often represented as PdHx, where x is the atomic ratio of hydrogen to palladium. This ratio typically ranges from 0 to approximately 0.7 under standard conditions, but can exceed 1 under high hydrogen pressures.

The formation of palladium hydride is a reversible process. Palladium can readily absorb and desorb hydrogen, making it useful in various applications. The absorption of hydrogen causes a change in the palladium lattice structure, leading to an expansion of the unit cell. This phenomenon is known as hydrogen embrittlement in some contexts, but it is also exploited for hydrogen purification and storage.

Palladium hydrides exhibit unique electrical and magnetic properties compared to pure palladium. Their formation and dissociation are critical in catalytic processes where palladium is used as a catalyst, as the hydrogen content can influence the catalytic activity. Research into palladium hydrides continues to explore their potential in areas such as hydrogen energy technologies and advanced materials.