酸蚀刻剂对钛基体及其IrO2-PbO2涂层表面形貌及电化学性能的影响
Effect of Acid Etchants on Surface Morphology and Electrochemical Properties of Titanium Substrates and Their IrO2-PbO2 Coatings
周键 1蔺文文 1韦程嘉 1李绘如1
作者信息
- 1. 兰州交通大学环境与市政工程学院,甘肃兰州 730070;寒旱地区水资源综合利用教育部工程研究中心,甘肃兰州 730070
- 折叠
摘要
采用热分解法制备Ti/IrO2-PbO2阳极,深入研究硫酸、硝酸、盐酸、草酸、盐酸/草酸蚀刻顺序对Ti/IrO2-PbO2阳极性能的影响规律,借助场发射扫描电子显微镜、X射线衍射、循环伏安法、线性扫描伏安法、电化学交流阻抗谱、加速寿命试验等考察钛基体及氧化物涂层的形貌、结构及电化学行为.结果表明:钛基体在双酸中的腐蚀效果优于单酸,获得更致密更均匀的表面结构.双酸腐蚀使钛表面拥有完整的TiHx晶型,有助于提高涂层负载量,增强活性层与基体的结合力.改变双酸蚀刻顺序对阳极电化学性能有一定的影响.草酸/盐酸蚀刻剂处理Ti/IrO2-PbO2阳极具有最佳的电催化活性与最长的加速寿命.
Abstract
The Ti/IrO2-PbO2 anodes were prepared by thermal decomposition.The effects of sulfuric acid,nitric acid,hydrochloric acid,oxalic acid and hydrochloric acid/oxalic acid etching sequence on the performance of Ti/IrO2-PbO2 anodes were studied.Surface morphologies,structure and electrochemical behavior of the titanium substrates with oxide-coating were investigated by field emission scanning electron microscope,X-ray diffraction,cyclic voltammetry,linear scanning voltammetry,electrochemical AC impedance spectroscopy and accelerated lifetime test.The results show that dual-acid etching can obtain better corrosion effect and denser and more uniform surface structure compared to single-acid etching.The dual-acid etching achieves a complete TiHx crystal form which is beneficial to increase the coating loading and to enhance the bonding force between the active layer and the substrate.The electrochemical properties of the anode are slightly determined by the order of double acid etching.The Ti/IrO2-PbO2 anode treated by oxalic acid/hydrochloric acid shows the best electrocatalytic activity and the longest accelerated lifetime.
关键词
酸蚀刻/Ti/IrO2-PbO2阳极/电化学性能/表面形貌Key words
acid etching/Ti/IrO2-PbO2 anodes/electrochemical properties/surface morphology引用本文复制引用
基金项目
国家自然科学基金(52364055)
国家自然科学基金(51804150)
甘肃省科技计划(20JR2RA002)
兰州交通大学"天佑青年托举人才计划"基金()
出版年
2024
NETL
NSTL
万方数据