Quantitative Evaluation of the Diffusion Coefficients of Aqua Ions in Hydrogels via Iron Corrosion
Quantitative Evaluation of the Diffusion Coefficients of Aqua Ions in Hydrogels via Iron Corrosion
复制标题
通过铁腐蚀定量评估水凝胶中水离子的扩散系数
DOI:
10.1021/acsaenm.2c00015
复制
发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Watanabe Seiichi
中科院分区:
文献类型:
--
作者:
Takai Satoshi;Murakami Shuntaro;Zhang Lihua;Ohsasa Kenichi;Watanabe Seiichi
A method to quantitatively evaluate the diffusion coefficient of aqua ions, viz. protons and hydroxide ions, in hydrogels using iron corrosion was developed. In this paper, the locations of the anode and cathode formation, which dominate iron corrosion, were experimentally controlled using pseudosacrificial corrosion protection with conductive anticorrosion ink. First, hydrogen (atomic) generation during the process was confirmed by a chromic gel with iron-doped tungstic acids. Then, the diffusion of aqua ions generated from them was visualized using a BTB-agar hydrogel with BTB (bromothymol blue), and the diffusion coefficient of aqua ions was evaluated using Fick’s law by reading the time variation of luminance. The temperature dependence of the diffusion coefficient was also examined, and the activation energies were evaluated as 19.0 ± 5.9 and 25.9 ± 3.3 kJ/mol for hydroxide ions and proton, respectively. Furthermore, the experimentally evaluated diffusion coefficients of aqua ions were used in a computer simulation to solve the diffusion equation to predict the pH distribution. The diffusion behaviors of aqua ions by the experiment are almost consistent with the simulation results and demonstrate the feasibility of the present method.
登录
查看更多内容
影响因子:
3.3
作者:
P. Lundberg;P. Kuchel
通讯作者:
P. Kuchel
影响因子:
3.8
作者:
Bengt A. Westrin;A. Axelsson
通讯作者:
A. Axelsson
影响因子:
3.9
作者:
Shuntaro Murakami;L. Zhang;Melbert Jeem;Kazumasa Okamoto;Y. Nakagawa;T. Shibayama;M. Ohnuma;Seiichi Watanabe
通讯作者:
Shuntaro Murakami;L. Zhang;Melbert Jeem;Kazumasa Okamoto;Y. Nakagawa;T. Shibayama;M. Ohnuma;Seiichi Watanabe
影响因子:
4.6
作者:
Shuntaro Murakami;Lihua Zhang;Seiichi Watanabe
通讯作者:
Shuntaro Murakami;Lihua Zhang;Seiichi Watanabe
DOI:
10.1139/v71-256
发表时间:
1971
期刊:
影响因子:
--
作者:
W. Dyck
通讯作者:
W. Dyck