Abstract
To solve the problem of uneven dispersion of catalysts, Ta2O5 with oxygen vacancy was introduced for CO conversion. In this work, cobalt was anchored in oxygen vacancies of Ta2O5 to form highly dispersion Co3O4/Ta2O5. The characteristics results of XRD, SEM, BET, TGA, ESR and H2-TPR show that cobalt was anchored in oxygen vacancies forming high dispersion Co3O4/Ta2O5 and a strong interaction between Co3O4 and Ta2O5. The CO conversion was tested at 150 ℃ and resulted in a 90% conversion rate, which is significantly higher than that of pure Co3O4 and Ta2O5. The main mechanism of Co3O4/Ta2O5 contributed to CO conversion was investigated by XPS and In-situ DRIFTs, revealing that Co3+ and activated oxygen play a vital role in CO conversion.
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