首页|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

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

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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.
Effect of Acid Etchants on Surface Morphology and Electrochemical Properties of Titanium Substrates and Their IrO2-PbO2 Coatings
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.

acid etchingTi/IrO2-PbO2 anodeselectrochemical propertiessurface morphology

周键、蔺文文、韦程嘉、李绘如

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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

酸蚀刻 Ti/IrO2-PbO2阳极 电化学性能 表面形貌

国家自然科学基金国家自然科学基金甘肃省科技计划兰州交通大学"天佑青年托举人才计划"基金

523640555180415020JR2RA002

2024

稀有金属材料与工程
中国有色金属学会,中国材料研究学会,西北有色金属研究院

稀有金属材料与工程

CSTPCD北大核心
影响因子:0.634
ISSN:1002-185X
年,卷(期):2024.53(4)
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