Estimation of exchange current density for hydrogen evolution reaction of copper electrode by using the differentiating polarization method

被引：9

作者：

Situmorang, Riky Stepanus ^{[1
]}

Seri, Osami ^{[2
]}

Kawai, Hideki ^{[2
]}

机构：

[1] Muroran Inst Technol, Grad Sch Engn, 27-1 Mizumoto, Muroran, Hokkaido 0508585, Japan

[2] Muroran Inst Technol, Grad Sch, Div Prod Syst, 27-1 Mizumoto, Muroran, Hokkaido 0508585, Japan

来源：

APPLIED SURFACE SCIENCE | 2020年 / 505卷

关键词：

Hydrogen evolution reaction; Exchange current density; Copper electrode; Tafel extrapolation method; Differential polarization method; MECHANISM;

D O I：

10.1016/j.apsusc.2019.144300

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Wide application of the Tafel extrapolation method (TEM) for the estimation value of the exchange current density (i(0)) on the hydrogen evolution reaction (HER) is still hindered because of some issues. For example, a possibility of improper reading of the tafel slope and the physical resistant such as an oxide film on electrode and solution resistance which requires more consideration in the calculation. The differential polarization method (DPM) was introduced as a reliable method to estimate the value of the is. In this paper, HER of a copper electrode in 0.5 mol dm(-3) H2SO4 solution was investigated and compared using both methods. The DPM shows that the undesirable physical factor of copper in the measurement could be removed rationally and is acceptable on the calculation of is. Moreover, the tafel slope region could be read accurately.

引用

页数：7

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