Enhancing the electrochemical activity of an IrOx-Ta2O5/Ti anode via radiofrequency-driven rapid plasma annealing

被引：9
作者：
Ma, Xiaoping [1 ,2 ]
Zhou, Yu [1 ,2 ]
Cao, Liyang [1 ,2 ]
Wang, Ketong [1 ,2 ]
Deng, Lili [1 ,2 ]
Fan, Ronglei [1 ,2 ]
Xin, Yu [1 ,2 ]
机构：
[1] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China
[2] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2020年 / 396卷
基金：
中国国家自然科学基金;
关键词：
Electrochemical activity; IrOx-Ta2O5/Ti anode; Conventional thermal decomposition; Plasma rapid annealing; OXYGEN EVOLUTION REACTION; SURFACE; PERFORMANCE; TEMPERATURE; ELECTROCATALYST; DEACTIVATION; VOLTAMMETRY; ELECTRODES; MORPHOLOGY; INTERLAYER;
D O I：
10.1016/j.surfcoat.2020.125961
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Electrochemical oxidation has attracted much attention in the wastewater treatment field due to its strong oxidation performance and control easiness. In the present study, the electrochemical activity of an IrOx-Ta2O5/Ti anode was enhanced via radiofrequency (RF)-driven rapid plasma annealing (RPA) process; a 2.0 MHz plasma jet was applied to the surface of the precursor-brushed IrOx-Ta2O5/Ti anode, changing the surface morphology and electrochemical characteristics of its coating. The final surface morphology, resulting from the subsequent calcination, exhibited a spongy-like microstructure and much smaller cracks compared with the coatings treated with the conventional thermal decomposition (CTD) process. Moreover, the RPA-treated samples showed lower overpotential (j = 10 mA/cm(2)) of 261 mV (vs. RHE) and higher voltammetric charges (330.26 mC/cm(2)). Compared with the CTD-treated one, the electrochemical activity of the RPA-treated samples was greatly improved with a comparable stability after additional calcination at 480 degrees C. This enhancement in the electrochemical performance indicates that an RF plasma jet, as an RPA tool, has a great potential for improving the catalytic activity of IrOx-Ta2O5/Ti anodes.
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页数：8
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