Rubidium peroxide is rubidium's peroxide with the chemical formula Rb2O2.

Rubidium peroxide can be produced by rapidly oxidizing rubidium in liquid ammonia at −50°C.

[1] It can also be produced by pyrolysis of rubidium superoxide in vacuum.

[1] Rubidium peroxide is a colourless to light yellow solid with the orthorhombic crystal structure.

[1]