The paper investigates the motion of self-motile colloidal particles that use chemical reactions catalyzed on their surfaces to achieve autonomous propulsion. The authors experimentally characterize the motion of these particles, which are polystyrene spheres coated with platinum on one side. At short times, the particles exhibit directed motion with velocities dependent on the concentration of hydrogen peroxide, a "fuel" molecule. Over longer times, the motion transitions to a random walk with an enhanced diffusion coefficient. The study suggests strategies for designing artificial chemotactic systems and highlights the potential of using chemical reactions for propulsion in micro- and nano-scale devices. The results provide insights into the fundamental principles of chemical locomotion and open new avenues for further research in this field.The paper investigates the motion of self-motile colloidal particles that use chemical reactions catalyzed on their surfaces to achieve autonomous propulsion. The authors experimentally characterize the motion of these particles, which are polystyrene spheres coated with platinum on one side. At short times, the particles exhibit directed motion with velocities dependent on the concentration of hydrogen peroxide, a "fuel" molecule. Over longer times, the motion transitions to a random walk with an enhanced diffusion coefficient. The study suggests strategies for designing artificial chemotactic systems and highlights the potential of using chemical reactions for propulsion in micro- and nano-scale devices. The results provide insights into the fundamental principles of chemical locomotion and open new avenues for further research in this field.