非水溶剂中纳米结构SrTiO3薄膜电极平带电位研究

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (6): 1070-1075.

非水溶剂中纳米结构SrTiO₃薄膜电极平带电位研究

张惠惠, 寇慧芝, 汪海波

武汉轻工大学化学与环境工程学院,武汉 430023

收稿日期:2021-02-25 出版日期:2021-06-15 发布日期:2021-07-08
通讯作者: 寇慧芝,中级实验师。E-mail:hzkou2007@163.com
作者简介:张惠惠(1994—),女,湖北省人,硕士研究生。E-mail:1714242542@qq.com
基金资助:
国家自然科学基金(21676208);湖北省自然科学基金(Q20181806)

Flatband Potentials for Nanostructured SrTiO₃ Film Electrodes in Nonaqueous Solvents

ZHANG Huihui, KOU Huizhi, WANG Haibo

School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China

Received:2021-02-25 Online:2021-06-15 Published:2021-07-08

摘要/Abstract

摘要： 本文制备了纳米结构SrTiO₃薄膜电极,并通过XRD、TEM和SEM对电极的结构和表面形貌进行表征。利用光谱电化学法,测定了纳米结构SrTiO₃电极在非水溶剂中的平带电位。研究发现:SrTiO₃电极在水中及非水质子溶剂(甲醇、乙醇)中的平带电位比在非水非质子溶剂(乙腈、四氢呋喃)中更正。在水及非水质子溶剂中,Li⁺的添加对 SrTiO₃电极的平带电位影响较小,而在非水非质子溶剂中,Li⁺的加入对 SrTiO₃电极的平带电位有较大影响,随着Li⁺浓度的增加,SrTiO₃电极的平带电位向电位更正的方向移动。

关键词: SrTiO₃电极, 光谱电化学, 非水质子溶剂, 非水非质子溶剂, 平带电位

Abstract: Transparent nanostructured SrTiO₃ film electrodes were prepared on conduction substrates and characterized by XRD, TEM and SEM. The flatband potential (E_fb) of a nanostructured SrTiO₃ electrode was determined with spectroelectrochemical measurement in a range of nonaqueous solvents (acetonitrile, tetrahydrofuran, methanol and ethanol). The results show that E_fb is significantly more positive for water and nonaqueous protic solvents (methanol and ethanol) than for nonaqueous aprotic solvents (acetonitrile and tetrahydrofuran) due to establishment of a proton adsorption-desorption equilibrium. Further, addition of Li⁺ has no significant effect on E_fb in water and nonaqueous protic solvents, but in nonaqueous aprotic solvents, the E_fb shifts to more positive values following the increase of added Li⁺ concentration.

Key words: SrTiO₃ electrode, spectroelectrochemical, nonaqueous protic solvent, nonaqueous aprotic solvent, flatband potential

中图分类号:

O649

张惠惠, 寇慧芝, 汪海波. 非水溶剂中纳米结构SrTiO₃薄膜电极平带电位研究[J]. 人工晶体学报, 2021, 50(6): 1070-1075.

ZHANG Huihui, KOU Huizhi, WANG Haibo. Flatband Potentials for Nanostructured SrTiO₃ Film Electrodes in Nonaqueous Solvents[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(6): 1070-1075.

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非水溶剂中纳米结构SrTiO₃薄膜电极平带电位研究

Flatband Potentials for Nanostructured SrTiO₃ Film Electrodes in Nonaqueous Solvents

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