The electrochemical behaviour of hydrogen evolution reaction (HER) on platinum in anhydrous ethanol-containing tetraethylammonium bromide was investigated using potentiodynamic polarization, open-circuit potential measurement, potentiostatic current-time transient, galvanostatic potential-time transient, impedance and surface appearance observation techniques. The potentiodynamic polarization curves revealed that the HER process had two stages with larger Tafel slopes in this solution. Such higher slopes might result from the presence of adsorbates on the Pt surface which act as a barrier for HER. The study of ultrasonic-wave impact on potentiodynamic polarization indicated that the desorption of the adsorbates including hydrogen atoms could be enhanced by ultrasonic wave. The hydrogen evolution potential (E-h) shifted to more noble values with increasing scanning rate and solution temperature. Surface appearance observations of the Pt surface demonstrated the existence of hydrogen evolution, presenting the growth of the hydrogen evolution. The potentiostatic current-time transients indicated that HER occurred on Pt at potentials more negative than E-h. The galvanostatic potential/time transients showed that the applied negative current density exerted a great influence on the values of E-h. The impedance spectra at potentials more negative than E-h exhibited two time constants at less-negative potentials, but just one time constant at higher negative potentials. [GRAPHICS] .