Fluorocarbon/palladium/magnesium-scandium hydrogen-induced color-change film and preparation method thereof

The invention discloses a fluorocarbon/palladium/magnesium-scandium hydrogen-induced color-change film and a preparation method thereof. The film comprises a magnesium-scandium composite film layer, a palladium catalytic layer and a fluorocarbon film layer which are sequentially arranged on a substrate. The preparation method comprises the following steps: firstly, growing the magnesium-scandium composite film layer on the substrate; then, growing the palladium catalytic layer on the magnesium-scandium layer in situ; and finally, depositing the fluorocarbon film layer on Pd. Reversible change-over between hydrogen gas and hydrogen atoms is promoted at a hydrogen suction and separation stage through catalytic effect of palladium; and a composite scandium element is added to accelerate diffusion, in the magnesium matrix, of the hydrogen atoms, so that formation and decomposition of hydrides are quickened, and quick change-over between a reflection state and a transparent state of the film can be realized, and h