Ti/Sb-SnO<sub>2</sub>电极电解后的表面状态变化

徐浩; 邵丹; 杨鸿辉; 延卫

doi:10.7652/xjtuxb201402016

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Ti/Sb-SnO₂电极电解后的表面状态变化

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- Ti/Sb-SnO₂电极电解后的表面状态变化
- Surface Analysis of Ti/Sb-SnO₂ Electrode after Electrolysis
- 西安交通大学学报 2014年48卷第2期页码：93-98
- 作者机构：
  
  西安交通大学环境科学与工程系,西安,710049
- 作者简介：
- 基金信息：
  
  : 2013-05-06。作者简介: 徐浩(1984—),男,博士,讲师;延卫(通信作者),男,教授,博士生导师。基金项目: 中国博士后科学基金资助项目(2013M532053);教育部高等学校博士学科点专项科研基金资助项目(20120201120058);中央高校基本科研业务费资助项目
- DOI：10.7652/xjtuxb201402016
  中图分类号： TQ150
- 网络首发：2014-02-10，
  
  纸质出版：2014
- 稿件说明：
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徐浩, 邵丹, 杨鸿辉, 等. Ti/Sb-SnO₂电极电解后的表面状态变化[J]. 西安交通大学学报, 2014,48(2):93-98. DOI: 10.7652/xjtuxb201402016.

Surface Analysis of Ti/Sb-SnO₂ Electrode after Electrolysis[J]. 2014, 48(2): 93-98. DOI: 10.7652/xjtuxb201402016.
徐浩, 邵丹, 杨鸿辉, 等. Ti/Sb-SnO₂电极电解后的表面状态变化[J]. 西安交通大学学报, 2014,48(2):93-98. DOI: 10.7652/xjtuxb201402016. DOI：

Surface Analysis of Ti/Sb-SnO₂ Electrode after Electrolysis[J]. 2014, 48(2): 93-98. DOI: 10.7652/xjtuxb201402016. DOI：

摘要

针对电极表面发生电化学反应而影响电极稳定性的问题

研究了0.1 mol·L

-1

的Na

溶液中以5×10

-3

A·cm

-2

恒电流电解300 h后Ti/Sb-SnO

电极表面状态的变化

同时采用扫描电镜、元素分析和X射线衍射检测了该表面的状态

用电感耦合等离子体发射光谱仪检测了电解后溶液中的金属含量。结果表明:经长时间电解后的Ti/Sb-SnO

电极表面出现了氧化物层局部溶解及脱落的情况; 电解完成后的溶液中检测到Sn元素; 电极表层的物质仍为Sb-SnO

但衍射峰强度有所降低

Ti峰强度大幅度升高。由此推测

表层氧化物层的溶解、局部区域的脱落以及基底与表面层之间的钝化可能是造成Ti/Sb-SnO

电极在长时间使用后失稳的主要原因。该结果可为改善Ti/Sb-SnO

电极表面形貌、提高表层氧化物负载量和电极稳定性研究提供参考。

Abstract

The change in the surface morphology in electrochemical processes can directly affect the stability of the electrode. Ti/Sb-SnO

the target electrode

was electrolyzed in the Na

solution(0.1 mol·L

-1

)under constant current density condition(5×10

-3

A·cm

-2

)for 300 h. scanning electron microscope

energy dispersive spectrometer and X-ray diffraction(XRD)were used to determine the change in the surface morphology. Inductively coupled plasma optical emission spectrometry was used to determine the metal content in the electrolyte. Then the possible reason for the deactivat

ion of the Ti/Sb-SnO

electrode after long time running was proposed. The SEM results show that the surface layer of the Ti/Sb-SnO

electrode was partially dissolved and some parts were even detached from the titanium base after electrolysis. The Sn element was detected in the electrolyte after electrolysis

suggesting that Sb-SnO

was indeed dissolved in the electrolyte. The XRD analysis indicates that the surface layer was still Sb-SnO

but the diffraction peak intensity decreased. It appears that the anode deactivation may result from the dissolution and detachment of the oxide layer and the passivation of substrate. The result can be useful for the enhancement of the electrode stability.

关键词

Keywords

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Ti/Sb-SnO2电极电解后的表面状态变化

Surface Analysis of Ti/Sb-SnO2 Electrode after Electrolysis

DOI：10.7652/xjtuxb201402016

摘要

Abstract

关键词

Keywords

references

Ti/Sb-SnO₂电极电解后的表面状态变化

Surface Analysis of Ti/Sb-SnO₂ Electrode after Electrolysis