研究目的
Investigating the structure–activity/stability correlations of titanium anode coatings formed of ordered TiO2@RuO2 microspheres for the oxygen and chlorine evolution reactions.
研究成果
The study revealed that the USP temperature significantly affects the structure, composition, and electrochemical properties of TiO2/RuO2 coatings. The 800?C-USP sample showed higher activity for both the CER and OER but lower stability compared to the 200?C-USP sample. The EIS analysis provided insights into the resistance and capacitance distributions within the coatings, highlighting the importance of the core/shell structure and the thermal treatment in determining the coating's performance. The findings contribute to the understanding of structure–activity/stability correlations in electrocatalytic materials.
研究不足
The study is limited by the specific synthesis conditions (USP at 200 and 800?C) and the focus on TiO2/RuO2 coatings. The findings may not be directly applicable to other materials or synthesis methods. The stability and activity of the coatings are influenced by the thermal treatment and the composition of the sphere shell, which may vary under different conditions.
1：Experimental Design and Method Selection:
The study involved the synthesis of TiO2/RuO2 particles by ultrasonic spray pyrolysis (USP) at two different temperatures (200 and 800?C). The electrochemical properties of these particles and their coatings on Ti substrates were analyzed using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).
2：Sample Selection and Data Sources:
The samples were prepared from tetra-n-butyl orthotitanate and ruthenium(III) chloride hydrate, with the final calcination performed during powder collection on an electrostatic mesh filter.
3：List of Experimental Equipment and Materials:
A Bio-Logic SAS potentiostat/galvanostat, model SP-200, was used for electrochemical measurements. The coatings were prepared on Ti rods (3 mm in diameter) from TiO2/RuO2 powders suspended in 2-propanol.
4：Experimental Procedures and Operational Workflow:
The coatings were formed by brushing the suspensions over Ti rods in 6 layers, with each layer dried at 120?C and annealed at 450?C for 5 min. The final annealing was at 450?C for 20 min.
5：Data Analysis Methods:
The EIS data were fitted using ZView software to a transmission line equivalent electrical circuit (TLEEC) to analyze the pore resistance and capacitance distributions.
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