کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6469703 | 1423976 | 2017 | 4 صفحه PDF | دانلود رایگان |
- A new technique to assist the Tafel extrapolation method is proposed.
- The technique has advantages: (a) accurate reading of the proper Tafel slope region and (b) easy removing of the physical resistances such as oxide film and solution resistance.
- The hydrogen evolution reaction on nickel electrode in 0.5 mol dmâ 3 H2SO4 solution has j0 = 10-2.3 mA cmâ 2 and αc = 0.39.
A new technique was introduced to assist the Tafel extrapolation method (TEM). The hydrogen evolution reaction (her) on nickel electrode in H2SO4 solution was investigated in comparison with the TEM and proposed technique. The exchange current density (j0) for her was assessed from points of simple and more accurate handling. The proposed technique has advantages: (1) proper reading of the Tafel slope region and (2) easy removing of undesirable physical factors such as oxide film and solution resistances.
Left hand side: the traditional Tafel estimation using η = a + b log â£Â j â£.Right hand side: the newly-proposed estimation using dloghexpjâ0.003dlogj=â1 â (8 mA cmâ 2 â¤Â | j | â¤Â 18 mA cmâ 2).297
Journal: Electrochemistry Communications - Volume 81, August 2017, Pages 150-153