By studying the influence of ultrasonic waves on the electrolytic hydrogen overpotential, the experimental results show that the change of the cathode potential of the separated hydrogen under the action of ultrasonic waves is independent of the cathode material, and the ultrasonic waves with less intensity have a weaker polarization effect, while the ultrasonic waves with higher intensity have a strong depolarization effect.
by studying the effect of ultrasound on the overpotential of electrolytic hydrogen evolution, the experimental results show that the change in cathodic potential for separating hydrogen under the action of ultrasound is independent of the cathode material. ultrasound with lower intensity has weaker polarization effect, while ultrasound with higher intensity has strong depolarization effect.
In this case, if the current density is small, the potential abrupt change will be obvious. The effect of ultrasound on the cathodic polarization curve of silver nitrate solution with EDTA as complexing agent was investigated. Experiments show that the potential of the same reaction system will jump suddenly under the action of ultrasonic field, and the reason for this needs to be further studied.
at this point, if the current density is small, the sudden change in potential will be very obvious. the experiment investigated the effect of ultrasound on the cathodic polarization curve of silver nitrate solution with edta as a complexing agent. the experiment found that under the action of ultrasound field, the potential of the same reaction system will undergo a sudden jump, and the reasons for this need to be further studied.
The effect of ultrasound on the electrode potential of metal electrodes such as copper, zinc and platinum was studied, and it was found that the measured metal electrode potential was a function of the ultrasound used. In addition, the direction of the electrode potential changes under ultrasonic radiation, for example, in the case of water electrolysis, between bright and clean platinum electrodes, especially when the cathode is irradiated with ultrasonics, the electrode potential required for water electrolysis will be significantly reduced.
studying the effect of ultrasound on the electrode potential of metal electrodes such as copper, zinc, and platinum, it was found that the measured electrode potentials of these metals are functions of the ultrasound used. in addition, under the radiation of ultrasound, the direction of electrode potential will also change. for example, during water electrolysis, the electrode potential required for water electrolysis will significantly decrease between bright and clean platinum electrodes, especially when the cathode is irradiated with ultrasound.
Due to the change in the direction of the electrode potential of the hydrogen electrode due to the action of ultrasonic, it is generally believed that it is due to the reduction of the concentration gradient of hydrogen molecules and hydrogen ions near the electrode due to the radiation of ultrasonic waves, or due to the cavitation on the electrode surface, which removes the adsorbed substance, continuously cleans and activates the electrode surface, or degasses the electrode surface so that the air bubbles do not obstruct the passage of current.
the reason for the directional change in the electrode potential of a hydrogen electrode due to the action of ultrasound is generally believed to be due to the decrease in the concentration gradient of hydrogen molecules and ions near the electrode caused by ultrasound radiation, or due to the occurrence of pore corrosion on the electrode surface, which removes the adsorbed material, continuously cleans and activates the electrode surface, or degasses the electrode surface to prevent bubbles from hindering the passage of current.