Design of ZnZrOx nanofiber Catalysts for efficient CO2 hydrogenation to methanol

ZnZrO x was a potential catalyst for CO 2 hydrogenation to methanol. However, the micrometer bulky morphology and low surface areas (e.g., <10 m 2 g -1 ) by traditional synthesis methods obstructed their way. This work demonstrated the electrospinning method for fabricating ZnZrOx nanofibers, with 30ZnZrOx-ES showing a significantly higher specific surface area (113.5   m²/g). The CH₃OH yield of 30ZnZrOx-ES was 1.6 times higher than that of 30ZnZrOx-CP, with good stability over 600   hours (300°C, 5   MPa, GHSV = 24,000   mL   g⁻¹ h⁻¹). In situ infrared spectroscopy indicated that 30ZnZrO x -ES was easier to produce formates than 30ZnZrO x -CP. DFT calculations and experimental results (EPR, Raman) confirmed that the oxygen-rich surface with abundant oxygen vacancies would enhance H₂ activation of 30ZnZrOx-ES.