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绿色合成和二元,三元和四元Ti/MMO阳极的表征,用于和氧的演化反应

A B Abdel-Aziz¹, F El-Taib Heakal², R M El Nashar³

¹October High Institute for Engineering & Technology, Giza, 12596, Egypt.

Scientific reports

|April 29, 2024

概括

这项研究开发了用于电化学应用的 (Ti) 上的新型混合金属氧化物 (MMO) 涂层. /MMO电极在和氧演变反应中表现出有希望的性能,其特殊成分提高了效率和稳定性.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
表面化学表面化学

背景情况:

使用涂有混合金属氧化物 (MMO) 的 (Ti) 金属的维度稳定阳极 (DSA) 对电化学应用至关重要,特别是-电解.
这些DSA的性能和稳定性高度依赖于MMO的组成和基质特性.

研究的目的:

在Ti基板上合成和电化学表征新型MMO涂层,用于演化反应 (CER) 和氧演化反应 (OER) 的不同成分.
调查氧化 (IrO2) 和氧化 (Ta2O5) 的添加对Ti/MMO电极的电化学效率和耐腐蚀性的影响.
确定最佳的Ti/MMO电极组合,以提高CER和OER应用中的性能.

主要方法:

在Ti基板上涂层沉积MMOs的成分,包括RuO2,TiO2,IrO2和Ta2O5.
使用扫描电子显微镜 (SEM),能量分散光谱 (EDS),X射线衍射 (XRD) 和X射线光电子光谱 (XPS) 的表面表征.
通过循环电压测量 (CV),电化学阻抗光谱 (EIS),电流开关测试,稳定性测试 (ST和AST) 和线性扫描电压测量 (LSV) 进行电化学评估.
使用差分扫描热量计 (DSC) 进行热分析,以确定明显的激活能量.

主要成果:

在CER和OER中,Ti/MMO电极表现出不同的性能,特定的成分显示出增强的电化学活性.
添加IrO2和Ta2O5影响了电极对CER和OER的潜力,Ti/RuO2-TiO2-IrO2-Ta2O5显示了两种反应之间的0.2V差异.
电化学表征证实了涂料的表面形态,成分和化学状态,将它们与性能相关联.

结论:

开发的Ti/MMO电极显示了高效的CER和OER应用的潜力.
纳入IrO2和Ta2O5可以量身定制,以优化DSA的电化学性能和选择性.
对特定氧化物添加物的作用的进一步研究可以导致工业电化学过程的先进电极材料.

关键词:

演变反应 (CER) 是一种化学反应.这是一个MMO.氧气演变反应 (OER) 是一种氧气演变反应.O2,TiO2,IrO2和Ta2O5是两种不同的物质.稳定性测试稳定性测试

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