The present disclosure discloses a process for improving the surface catalytic efficiency of a catalyst substrate. In some embodiments, to use nano-catalyst particles more efficiently, a process uses a porous substrate as a stationary phase support and disperses the nano-catalyst particles uniformly in all the internal space of the porous substrate, such that reactants flow through the porous substrate to achieve a catalytic effect. In some embodiments, the process not only improves the use efficiency of nano-catalyst particles, but also enables easier and more convenient adjustment of various parameters of a catalytic reaction.