Method for preparing Pd nanosphere with rough surface without surfactant and application of Pd nanosphere

The invention relates to a surfactant-free method for preparing Pd nanospheres with rough surfaces and application of the Pd nanospheres, which comprises the following steps: firstly, preparing an ethanol aqueous solution or a methanol aqueous solution, then adding a certain amount of Pd precursor into the ethanol aqueous solution or the methanol aqueous solution, slightly shaking a reaction container to uniformly mix the reaction system, and carrying out vacuum drying to obtain the Pd nanospheres with rough surfaces. The preparation method comprises the following steps: preparing a reaction system, standing the reaction system under a dark condition for reaction, centrifugally separating a reaction product after the reaction is completed, centrifugally washing the obtained precipitate by using ultrapure water, and drying at 20-60 DEG C to obtain the Pd nanospheres with rough surfaces. The method does not need to use a surfactant and a hard template, does not need to additionally add a reducing agent, does no