A study of the electrochemical absorption and diffusion of hydrogen into mercury in acidic solution
M Jafarian, M G Mahjani, O Azizi & F Gobal
The electrochemical adsorption and diffusion (dissolution) of hydrogen into mercury have been studied by the methods of cyclic voltammetry and impedance spectroscopy. In the potential range of -0.15 to -1.5 V (vs. Ag/AgCl) two peaks at -0.4 and -0.8 V have been observed and are associated with the adsorption and absorption of hydrogen. Impedance studies exhibited two overlapping semi-circles terminating in a straight line in the low potential region. The size of the semi-circles increase as the potential is raised and attributed to the increased resistive effect of the dissolved hydrogen. The value of the real component upon increasing the measurement potential to -0.9 V is followed by a sharp decrease at higher potential and indicates the removal of the absorbed as well as adsorbed hydrogen atoms through the HER routes.
Indian Journal of Chemistry
Vol. 42A, February 2003, pp 300-304
M Jafarian, M G Mahjani, O Azizi & F Gobal
The electrochemical adsorption and diffusion (dissolution) of hydrogen into mercury have been studied by the methods of cyclic voltammetry and impedance spectroscopy. In the potential range of -0.15 to -1.5 V (vs. Ag/AgCl) two peaks at -0.4 and -0.8 V have been observed and are associated with the adsorption and absorption of hydrogen. Impedance studies exhibited two overlapping semi-circles terminating in a straight line in the low potential region. The size of the semi-circles increase as the potential is raised and attributed to the increased resistive effect of the dissolved hydrogen. The value of the real component upon increasing the measurement potential to -0.9 V is followed by a sharp decrease at higher potential and indicates the removal of the absorbed as well as adsorbed hydrogen atoms through the HER routes.
Indian Journal of Chemistry
Vol. 42A, February 2003, pp 300-304
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