Electrochemical template synthesis of hollow zinc oxide microtubes for photoelectrocatalytic water splitting: Effects of electrodeposition conditions and annealing temperature

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2024-11-17 DOI:10.1016/j.jelechem.2024.118813

D.S. Dmitriev, M.I. Tenevich, E.K. Khrapova

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引用次数: 0

Abstract

In this paper, the problem of synthesizing hollow structures as a photoactive material for water electrolysis is addressed using the example of ZnO microtubes. In the study, a novel method of electrochemical template-assisted synthesis was applied to produce microtubes. The influence of zinc electrodeposition conditions (mode and electrolyte) and annealing on the photoelectrocatalytic (PEC) properties of the electrode material was evaluated. Samples prepared from citrate and zincate electrolytes were analyzed using scanning electron microscopy, energy dispersive X-ray mapping, X-ray diffraction, diffuse reflectance spectroscopy, photogalvanic response, voltammetry, and electrochemical impedance spectroscopy. The purpose of this paper was to demonstrate the advantages of using a citrate electrolyte over a classical zincate electrolyte for the electrochemical template method. It has been found that using citrate electrolyte allows for the production of ZnO microtubes that improve the PEC performance by 1.5–2 times. The effect of the synthesis conditions of the electrode material on the charge transfer resistance and diffusion limitations in the water splitting reaction is analyzed.

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用于光电催化水分离的空心氧化锌微管的电化学模板合成：电沉积条件和退火温度的影响

本文以氧化锌微管为例，探讨了合成空心结构作为电解水光活性材料的问题。研究采用了一种新型的电化学模板辅助合成方法来制备微管。研究评估了锌电沉积条件（模式和电解质）和退火对电极材料光电催化特性的影响。使用扫描电子显微镜、能量色散 X 射线绘图、X 射线衍射、漫反射光谱、光电反应、伏安法和电化学阻抗光谱分析了从柠檬酸盐和锌酸盐电解质制备的样品。本文旨在证明在电化学模板法中使用柠檬酸盐电解质比使用传统锌酸盐电解质的优势。研究发现，使用柠檬酸盐电解质可以生产出氧化锌微管，使 PEC 性能提高 1.5-2 倍。分析了电极材料的合成条件对电荷转移电阻和水分离反应中扩散限制的影响。

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.