研究目的
Investigating the synthesis of WO3?x nanowires using a non-metal selenium catalyst and their intrinsic metallicity due to oxygen vacancies.
研究成果
The study successfully synthesized oxygen-deficient WO3?x nanowires using a selenium-assisted APCVD method, demonstrating their metallic nature due to oxygen vacancies. This provides a new approach for designing metallic WO3?x nanowires for applications such as hydrogen evolution reaction.
研究不足
The study does not explore the scalability of the synthesis method for industrial applications or the long-term stability of the WO3?x nanowires under operational conditions.
1：Experimental Design and Method Selection:
The study employed an atmosphere pressure chemical vapor deposition (APCVD) method for the synthesis of WO3?x nanowires, utilizing selenium as a catalyst.
2：Sample Selection and Data Sources:
WO3 powder and selenium powder were used as precursors, with SiO2/Si substrates for nanowire deposition.
3：List of Experimental Equipment and Materials:
Equipment included a furnace for CVD, SEM (JSM-6700F, JEOL), HRTEM (JEOL ARM200F), AFM (Bruker, Dimension Icon), and XPS for characterization.
4：Experimental Procedures and Operational Workflow:
The synthesis involved heating WO3 and selenium powders in a furnace under a mixed argon and hydrogen atmosphere, followed by characterization and device fabrication for electrical measurements.
5：Data Analysis Methods:
The morphology and structure were analyzed using SEM, AFM, and TEM. XPS was used for chemical composition analysis, and electrical properties were measured using a semiconductor characterization system (Keithley 4200 SCS).
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