In order to ensure continuous H2 generation, it is oxidized during the reaction, consuming the holes created during water splitting and preventing them from recombining with electrons to provide additional reactive electrons to the system. Usually, this oxidation process produces formaldehyde, formic acid, and other oxidation products . Even so, the plate and ultrasonic probe can be submerged in the electrolyte simultaneously or kept apart. Whenever an electrolyte is isolated from an ultrasonic probe or plate, an inner electrochemical cell is typically employed; in both instances, the "face-on" geometry dictates that the ultrasonicemitting source should be directed towards the surface of the working electrode. investigated hydrogen evolution in a 1 M H₂SO₄ solution at a platinized platinum electrode under 38 kHz ultrasonic insonation. Compared to silent conditions, they observed a 2.1-fold increase in current due to the application of ultrasonics. Interestingly, despite the reversible nature of proton reduction at platinized platinum electrodes, the increase in current was not attributed to improved diffusion of H⁺ ions. Instead, the enhanced current resulted from the removal of hydrogen bubbles from the electrode surface, improving the efficiency of the reaction. In a similar study, McMurray et al. demonstrated that ultrasonic waves (20 kHz, 26 W/m²) significantly accelerated both the oxygen reduction reaction (ORR) and the HER at a vibrating titanium electrode. Their findings highlighted those ultrasonics enhanced mass transport and activated an activation-controlled process, making both reactions more efficient.