钌镧氧化物涂层析氯反应动力学比较研究

doi:10.15541/jim20140425

无机材料学报 ›› 2015, Vol. 30 ›› Issue (5): 493-499.DOI: 10.15541/jim20140425 CSTR: 32189.14.10.15541/jim20140425

钌镧氧化物涂层析氯反应动力学比较研究

龙萍^1,2, 许立坤², 崔秀芳¹, 金国¹

(1. 哈尔滨工程大学超轻材料与表面技术教育部重点实验室, 哈尔滨 150001; 2. 中国船舶重工集团公司第七二五研究所, 海洋腐蚀与防护重点实验室, 青岛 266071)

收稿日期:2014-08-18 修回日期:2014-11-06 出版日期:2015-05-20 网络出版日期:2015-04-28
作者简介:龙萍(1963–), 女, 博士. E-mail: longping@hrbeu.edu.cn
基金资助:
国家自然科学基金(51275105, 51375106); 国家重点基础研究发展计划(973)(2011CB013404); 中央高校基本科研业务费(HEUCF20151013)

Comparative Study on Kinetics of Chlorine Evolution Reaction for Ru-La-O Oxide Coatings

LONG Ping^1,2, XU Li-Kun², CUI Xiu-Fang¹, JIN Guo¹

(1. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; 2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266071, China)

Received:2014-08-18 Revised:2014-11-06 Published:2015-05-20 Online:2015-04-28
About author:LONG Ping. E-mail: longping@hrbeu.edu.cn
Supported by:
National Natural Science Foundation of China(51275105, 51375106); 973 Program(2011CB013404); Fundamental Research Funds for the Central Universities(HEUCF20151013)

摘要/Abstract

摘要：

通过热分解法制备了Ti/RuO₂和Ti/Ru-La-O氧化物涂层, 利用微分电容和极化曲线等实验方法对涂层Clˉ特性吸附、La对RuO₂涂层析氯反应过程的影响及反应机理进行了研究。结果表明, 在NaCl溶液中, 涂层表面存在Clˉ的特性吸附, 这种特性吸附对析氯反应的动力学产生了影响, 导致Tafel斜率上升, 反应级数下降, 加入La使氧化钌涂层的过电位下降, 交换电流密度增大, 有利于析氯反应的进行。本文对涂层存在的两种可能反应机理进行了比较分析, 认为在中性NaCl溶液中析氯反应是由过程控制的。

关键词: 特性吸附, 钌镧氧化物, 析氯反应, Volmer-Tafel机理, RuO₂

Abstract:

The Ti/RuO₂ and Ti/Ru-La-O oxide coatings were prepared by thermal decomposition of the metal chlorides in the precursor solution. The specific adsorption of Clˉ on coatings, the effect of La on the chlorine evolution reactions (ClER) and the kinetic mechanism were investigated by using differential capacity (DC) and polarization curves (PC). Results show that the coating surface exhibits significantly specific adsorption of Clˉ in NaCl neutral solution, which has an influence on the kinetics of the chlorine evolution process, resulting in an increase of the Tafel slope and a decrease of the reaction order. The addition of lanthanum reduces the overpotential of Ti/RuO₂ coating and enhances the exchange current density, which improves the chlorine evolution reaction of the coatings. Both kinetic mechanisms of recombination and electrochemical desorption of adsorbed intermediate species for the coatings are comparatively studied. It is confirmed that the Chlorine evolution reaction on Ru-La-O oxide coatings in NaCl neutral solution is controlled by the process of.

Key words: specific adsorption, Ru-La-O oxides, chlorine evolution reaction, Volmer-Tafel mechanism, RuO₂

中图分类号:

TQ174

龙萍, 许立坤, 崔秀芳, 金国. 钌镧氧化物涂层析氯反应动力学比较研究[J]. 无机材料学报, 2015, 30(5): 493-499.

LONG Ping, XU Li-Kun, CUI Xiu-Fang, JIN Guo. Comparative Study on Kinetics of Chlorine Evolution Reaction for Ru-La-O Oxide Coatings[J]. Journal of Inorganic Materials, 2015, 30(5): 493-499.

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钌镧氧化物涂层析氯反应动力学比较研究

Comparative Study on Kinetics of Chlorine Evolution Reaction for Ru-La-O Oxide Coatings

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