引入电弧喷涂氮化锆中间层的钛基<strong>PbO<sub>2</sub></strong>的电催化阳极性能

doi:10.11901/1005.3093.2019.578

材料研究学报

2020, Vol. 34

Issue (7): 527-534 DOI: 10.11901/1005.3093.2019.578

研究论文

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引入电弧喷涂氮化锆中间层的钛基PbO₂的电催化阳极性能

唐长斌¹(

), 王飞¹, 牛浩¹, 于丽花¹, 薛娟琴¹, 尹向阳²

1.西安建筑科技大学冶金工程学院西安 710055
2.陕西新兴热喷涂技术有限公司西安 710000

Properties of Ti-based PbO₂ Electrocatalytic Anodes with an Arc Sprayed ZrN-interlayer

TANG Changbin¹(

), WANG Fei¹, NIU Hao¹, YU Lihua¹, XUE Juanqin¹, YIN Xiangyang²

1.School of Metallurgy and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
2.Shaanxi Xinxing Thermal Spraying Technology Co. Ltd. , Xi'an 710000, China

引用本文:

唐长斌, 王飞, 牛浩, 于丽花, 薛娟琴, 尹向阳. 引入电弧喷涂氮化锆中间层的钛基PbO₂的电催化阳极性能[J]. 材料研究学报, 2020, 34(7): 527-534.
Changbin TANG, Fei WANG, Hao NIU, Lihua YU, Juanqin XUE, Xiangyang YIN. Properties of Ti-based PbO₂ Electrocatalytic Anodes with an Arc Sprayed ZrN-interlayer[J]. Chinese Journal of Materials Research, 2020, 34(7): 527-534.

全文: PDF(7000 KB) HTML

摘要:

在钛基体电弧喷涂氮化锆中间层，然后在其上阳极电沉积涂覆β-PbO₂催化表层，制备出Ti/ZrN/PbO₂阳极。对其进行微观结构分析和表面粗糙度测试、中间层附着力评价、电极加速寿命和电化学性能测试以及电氧化苯酚模拟废水实验，并与无中间层的Ti/PbO₂电极对比，研究了有中间层的钛基PbO₂涂层的阳极性能。结果表明，氮化锆中间层使阳极材料的导电性提高，中间层的粗糙表面使PbO₂电沉积层明显细化，表面整平性凸显，涂层与基体结合牢固，PbO₂沉积厚度增加，活性位点的数量增多。有氮化锆中间层的阳极加速寿命显著延长，比Ti/PbO₂电极延长了7倍，对有机污染物的电催化降解活性也有提高。

关键词 ：材料表面与界面, 钛基二氧化铅阳极, 中间层, 氮化锆电弧喷涂层, 电化学氧化, 延寿

Abstract：

The Ti/ZrN/PbO₂ electrodes were prepared via an arc spraying ZrN-interlayer on the Ti-substrate and then followed by anodic electrodeposition of β-PbO₂ surface coating. By taking the plain Ti/PbO₂ electrode as comparison, the prepared electrodes were characterized in terms of microstructure, surface roughness, coating adhesion, accelerated life assessment, electrochemical performance and electro-oxidation of phenol. The results show that the accelerated life-time for Ti/ZrN/PbO₂ anodes was obviously prolonged to 8 times of that for the plain Ti/PbO₂electrode. Meanwhile, the electrocatalytic degradation activity of this anode for the organic pollutants was enhanced. This is directly related to the improvement of the conductivity of the electrode brought by the arc sprayed ZrN interlayer and which then enables the layer of electrodeposited PbO₂ to be significantly refined and thicker with much flat surface and better adhesive to the substrate, as well as more active sites caused by the rough surface characteristics of this arc spraying intermediate layer.

Key words： surface and interface in the materials titanium-based lead dioxide anode interlayer zirconium nitride arc spray coating electro-oxidation life extension

收稿日期: 2019-12-10

ZTFLH:

TQ174

基金资助:国家自然科学基金(51874227);陕西省自然科学基金(2018JM5131);陕西省自然科学基金(2018JM5139)

作者简介: 唐长斌，男，1973年生，博士

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链接本文:

https://www.cjmr.org/CN/10.11901/1005.3093.2019.578 或 https://www.cjmr.org/CN/Y2020/V34/I7/527

图1 用电弧喷涂制备氮化锆中间层的示意图

图2 电弧喷涂制备氮化锆中间层及电沉积PbO2所得涂层电极的结果分析

图3 电极加速寿命试验槽压随时间的变化

表1 本文的结果与文献报道的含中间层的钛基PbO2电极(加速或服役)寿命对比

图4 Ti/ZrN/PbO2电极的电催化活性位点测试和析氧反应动力学过程Nyquist谱图

表2 析氧反应EIS阻抗拟合结果

图5 电催化降解苯酚废水时苯酚和COD去除率随时间的变化和动力学拟合对比

表3 不同电极降解动力学比较

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