Optimization of c/rh-In2O3-Based Electrode Technology for Photoelectrochemical Systems

IF 1.3 4区化学 Q4 CHEMISTRY, PHYSICAL

Kinetics and Catalysis Pub Date : 2024-11-04 DOI:10.1134/S0023158424601918

T. A. Molodtsova, A. B. Kuriganova, L. N. Fesenko, I. N. Leontyev, N. V. Smirnova

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Abstract

This work systematically investigated the influence of fabrication parameters on photoelectrodes of a biphasic indium oxide polymorph (In₂O₃) with cubic (c-) and rhombohedral (rh-) phase contents of 72 and 28%, respectively, deposited on the surface of conductive fluorine-doped tin oxide (FTO) glass. The study examined the effects of varying the concentration of c/rh-In₂O₃ suspension, the composition of the dispersion medium, the number of cycles, and the mode of suspension application onto FTO glass. Linear voltammetry, chronoamperometry, and impedance spectroscopy in the illumination mode were used to demonstrate that the photoelectrode made with a suspension based on isopropyl alcohol at an c/rh-In₂O₃ concentration of 100 g/L exhibited the highest photocurrent density and the lowest charge transfer resistance in an aqueous electrolyte solution of 0.5 M Na₂SO₄ + 0.25 M Na₂SO₃. It has been shown that the optimal approach was to apply three layers using a multistage application mode. The results obtained can be used as a basis for the development of optimization protocols for the photoelectrodes based on oxide-containing systems and photoelectrochemical devices based on c/rh-In₂O₃ material.

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优化光电化学系统中基于 c/rh-In2O3 的电极技术

本研究系统地探讨了制造参数对沉积在导电掺氟氧化锡（FTO）玻璃表面的双相氧化铟多晶体（In2O3）光电极的影响，该氧化铟多晶体的立方相（c-）和斜方相（rh-）含量分别为 72% 和 28%。研究考察了改变 c/rh-In2O3 悬浮液的浓度、分散介质的成分、循环次数以及在 FTO 玻璃上应用悬浮液的模式所产生的影响。通过线性伏安法、计时安培法和照明模式下的阻抗光谱法证明，在 0.5 M Na2SO4 + 0.25 M Na2SO3 的水性电解质溶液中，以异丙醇为基础、c/rh-In2O3 浓度为 100 g/L 的悬浮液制成的光电极表现出最高的光电流密度和最低的电荷转移电阻。研究表明，最佳方法是采用多级涂敷模式涂敷三层。获得的结果可作为开发基于含氧化物系统的光电电极和基于 c/rh-In2O3 材料的光电化学器件的优化方案的基础。

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来源期刊

Kinetics and Catalysis 化学-物理化学

CiteScore

2.10

自引率

27.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Kinetics and Catalysis Russian is a periodical that publishes theoretical and experimental works on homogeneous and heterogeneous kinetics and catalysis. Other topics include the mechanism and kinetics of noncatalytic processes in gaseous, liquid, and solid phases, quantum chemical calculations in kinetics and catalysis, methods of studying catalytic processes and catalysts, the chemistry of catalysts and adsorbent surfaces, the structure and physicochemical properties of catalysts, preparation and poisoning of catalysts, macrokinetics, and computer simulations in catalysis. The journal also publishes review articles on contemporary problems in kinetics and catalysis. The journal welcomes manuscripts from all countries in the English or Russian language.