The invention relates to a method for generating a
composite oxide nanotube array on the high-entropy
alloy surface. The method includes the steps that a high-entropy
alloy is subject to
anodic oxidation after surface pretreatment is carried out, the oxidation
voltage and the oxidation time are changed, and
composite oxide nanotubes with different diameters and different thicknesses can be generated on the high-entropy
alloy surface. After the prepared
composite oxide nanotubes are subject to high-temperature heat treatment, amorphous type
nanotube crystallization is carried out; and meanwhile, the
heat stability of the
nanotube array is high, and the complete
nanotube array morphology can be kept after high-temperature heat treatment. The composite
oxide nanotube array prepared through the high-entropy alloy has the higher
heat stability, and can be applied at a higher temperature, for example, high temperature catalyzing, high temperature gas sensitivity and the like can be achieved. In this way, thin films of the generated composite
oxide nanotubes will have a great
promotion effect on expanding the application of the high-entropy alloy.