石墨烯改性Ti/IrTaSnSb-G金属氧化物阳极在低温和低盐NaCl溶液中的电化学性能

doi:10.11902/1005.4537.2019.185

中国腐蚀与防护学报

2020, Vol. 40

Issue (3): 289-294 DOI: 10.11902/1005.4537.2019.185

研究报告

本期目录 | 过刊浏览

石墨烯改性Ti/IrTaSnSb-G金属氧化物阳极在低温和低盐NaCl溶液中的电化学性能

王廷勇¹^,²(

), 董如意², 许实², 王辉²

1 洛阳船舶材料研究所洛阳 471000
2 青岛双瑞海洋环境工程股份有限公司青岛 266101

Electrochemical Properties of Graphene Modified Mixed Metal Oxide Anodes of Ti/IrTaSnSb-G in NaCl Solutions at Low Temperature

WANG Tingyong¹^,²(

), DONG Ruyi², XU Shi², WANG Hui²

1 Luoyang Ship Material Research Institute, Luoyang 471000, China
2 Sunrui Marine Environment Engineering Co. , Ltd. , Qingdao 266101, China

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摘要:

采用热分解法制备了添加石墨烯的Ti/IrTaSnSb-G金属氧化物阳极，测试了阳极在1.5%NaCl溶液中的电化学性能，并通过SEM及EDS进行了显微形貌和成分分析，研究了石墨烯对阳极性能的影响。结果表明：石墨烯促进了IrO₂在阳极表面偏析，其晶粒结构主要呈枝状，并存在二次结晶现象，形成纳米针状结构。此外，石墨烯阻碍了涂层中裂纹的扩展，使得阳极表面的裂纹更多、更细小，从而增大了阳极的活性表面积，进而提高了阳极的电化学活性。当石墨烯添加量为0.6 g/L时，氧化物阳极的性能改善最佳，在低温和低盐NaCl溶液中的电流效率分别提高了9%和13%。

关键词 ：石墨烯, 氧化物阳极, 电化学活性, 电流效率

Abstract：

Graphene-modified mixed metal oxide anodes of Ti/IrTaSnSb-G were prepared by thermal decomposition, and then the electrochemical performance of the anodes in NaCl solutions was examined via electrochemical workshop type PAR2273 and SEM equipped with EDS in terms of the effect of graphene on the performance of anodes. The results show that the graphene promotes the segregation of IrO₂, which then resulted in the formation of dendritic structure on the surface of the anodes, in the meanwhile, secondary crystallization phenomenon could induce the formation of nano-needle structure of IrO₂, which increases the active surface areas and improves subsequently the electrocatalytic activity of the anodes. Besides, the electrolysis current efficiency of the electrode with 0.6 g/L graphene increases 9% in 3.5%NaCl solution at 5 ℃ and 13% in 1.5%NaCl solution at 15 ℃ respectively.

Key words： graphene oxide anode electrochemical activity current efficiency

收稿日期: 2019-10-20

ZTFLH:

O646

通讯作者: 王廷勇 E-mail: wangty@sunrui.net

Corresponding author: WANG Tingyong E-mail: wangty@sunrui.net

作者简介: 王廷勇，男，1970年生，研究员

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引用本文:

王廷勇, 董如意, 许实, 王辉. 石墨烯改性Ti/IrTaSnSb-G金属氧化物阳极在低温和低盐NaCl溶液中的电化学性能[J]. 中国腐蚀与防护学报, 2020, 40(3): 289-294.
Tingyong WANG, Ruyi DONG, Shi XU, Hui WANG. Electrochemical Properties of Graphene Modified Mixed Metal Oxide Anodes of Ti/IrTaSnSb-G in NaCl Solutions at Low Temperature. Journal of Chinese Society for Corrosion and protection, 2020, 40(3): 289-294.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2019.185 或 https://www.jcscp.org/CN/Y2020/V40/I3/289

图1 Ti/IrTaSnSb-G anodes阳极的红外光谱

图2 不同IrTaSnSb-G阳极的显微形貌

表1 不同Ti/IrTaSnSb-G阳极表面成分

图3 不同Ti/IrTaSnSb-G阳极的循环伏安曲线

图4 不同Ti/IrTaSnSb-G阳极的循环伏安电荷

图5 不同Ti/IrTaSnSb-G阳极在1.5%NaCl溶液中的极化曲线

图7 不同Ti/IrTaSnSb-G阳极的Nyqusit图

图6 Ti/IrTaSnSb-G阳极在1.5%NaCl溶液中的等效电路图

表2 不同烧结温度Ti/IrTaSnSb-G阳极电化学阻抗等效电路拟合值

图8 不同阳极在5 ℃的3.5%NaCl溶液和15 ℃的1.5%NaCl溶液中的电流效率曲线

图9 不同Ti/IrTaSnSb-G在40 ℃的0.5 mol·L-1硫酸溶液中的强化电解寿命

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