标题: The Influence of Electrochemical Polarization on Oxygen Transport In Platinum Coating of Pt/Ti Anode During Oxygen Evolution

作者: Guo, L (Guo, Lei); Du, KF (Du, Kaifa); Liu, MH (Liu, Minghao); Wang, XY (Wang, Xingyi); Tang, MY (Tang, Mengyi); Li, WM (Li, Wenmiao); Chen, D (Chen, Di); Yin, HY (Yin, Huayi); Wang, DH (Wang, Dihua)

来源出版物: JOURNAL OF THE ELECTROCHEMICAL SOCIETY  卷: 172  期: 6  文献号: 066502  DOI: 10.1149/1945-7111/addb82  Published Date: 2025 JUN 1  

摘要: Oxygen transport is a critical process in high-temperature electrochemical systems, mainly associated with adverse effects such as electrode degradation and increased overpotential. Understanding the mechanism and dynamics of oxygen transport is crucial for regulating electrochemical systems. Herein, we systematically investigate the influence of the electrochemical polarization on oxygen transport behavior within the Pt-coated titanium anode (Pt/Ti) using a molten carbonate electrolysis cell. Contrast experiments demonstrate that the electrochemical polarization significantly accelerates the oxygen transport process. The proposed oxygen transport mechanism indicates that the acceleration effect is attributed to the increased surface oxygen concentration and the existence of the electric field within the anode. The oxygen transport dynamic model is put forward based on the oxygen transport mechanism, relating oxygen flux to surface oxygen concentration, electric field intensity, and temperature. Combining model analysis and experiment results, it's revealed that both temperature and current density significantly affect oxygen transport dynamics under electrochemical polarization.

Oxygen atoms can penetrate Pt coating and then oxidize Ti substrate during OER.Electrochemical polarization significantly accelerated oxygen transport.Higher surface oxygen concentration and additional electric field led to the acceleration.A dynamic model of oxygen transport under electrochemical polarization was proposed.Current density and temperature played crucial roles in oxygen transport dynamics.

作者关键词: oxygen transport; electrochemical polarization; high-temperature electrochemical cells; Pt/Ti anode; dynamic model

KeyWords Plus: SOLID-STATE ELECTROTRANSPORT; HIGH-TEMPERATURE OXIDATION; MOLTEN-SALT; CO2; CARBON; PURIFICATION; CONVERSION; DIFFUSION; REDUCTION; CORROSION

地址: [Guo, Lei; Du, Kaifa; Liu, Minghao; Wang, Xingyi; Tang, Mengyi; Li, Wenmiao; Chen, Di; Yin, Huayi; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Guo, Lei; Du, Kaifa; Liu, Minghao; Wang, Xingyi; Tang, Mengyi; Li, Wenmiao; Chen, Di; Yin, Huayi; Wang, Dihua] Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

通讯作者地址: Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

Wang, DH (通讯作者)，Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

电子邮件地址: wangdh@whu.edu.cn

影响因子：3.3