Chinatungsten Online’s latest research results from various parties believe that black tungsten oxide is oxygen-deficient WO3−x, (Black Tungsten Oxide) has a black appearance, is a black tubular metal oxide with low oxygen vacancies, and the optical properties of black WO3−x NFs Bandgap reduction (1.48 eV), surface oxygen vacancies (O/Wsurf=2.44) have good surface charge properties and high bulk conductivity, black tungsten oxide has high reducibility and stability, and other low-valent metal species and crystals Similar to the oxygen vacancies in the lattice, it can have broad application prospects in industrial fields such as gas sensing, photocatalysis, and rechargeable batteries.
The Korean Institute proposed an effective strategy to prepare Pt metal catalysts using WO3-x nanofibers (NFs) with controllable oxygen vacancies as metal oxide supports. The Pt/black WO3−x NF system exhibited excellent catalytic performance in redox reactions, which was superior to that of Pt-loaded crystalline white WO3−x NFs prepared by oxidative calcination (650 °C in air) of electrospun fibers. Based on structural characterization and computational studies, the researchers attribute their high catalytic activity to the reduced optical bandgap (1.48 eV) of black WO3−x NFs, with surface oxygen vacancies (O/Wsurf = 2.44) facilitating the size-controllable Pt The large number of ORR active sites on NPs and the favorable surface charge properties of Pt NPs lead to enhanced bulk conductivity. The enhanced durability of Pt/black WO3−x NFs is attributed to the strong coupling between the Pt clusters and the oxygen-deficient WO3−x surface, as well as its ability to prevent the aggregation of Pt nanoparticles, resulting in efficient Pt loading and Catalytic durability. This study highlights a new strategy for preparing high-performance catalyst/metal oxide hybrid materials, and also provides a new direction for the wide application of metal oxides to overcome the current limitations of metal oxides.
Related information about black tungsten oxide:
Black tungsten oxide nanofibers enhance platinum catalyst performance
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Preparation and Characterization of Black Tungsten Oxide
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