CexZr1−xO2 solid solutions for catalytic synthesis of dimethyl carbonate from CO2: Reaction mechanism and the effect of catalyst morphology on catalytic activity. (15th March 2018)

• Record Type: Journal Article
• Authors: Tamboli, Ashif H.; Chaugule, Avinash A.; Gosavi, Suresh W.; Kim, Hern
• Is Part Of: Fuel. Volume 216(2018)
• Page Start: 245
• Page End: 254
• Publication Date: 2018-03-15
• Subjects: Ceria-zirconia -- Solid solutions -- Formation mechanism -- Carbon dioxide -- Dimethyl carbonate; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2017.12.008
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Abstract: In the development of green and sustainable processes, one-pot conversion of carbon dioxide into value-added organic chemicals such as dimethyl carbonate (DMC) attracted much attention. In the present study, a series of Ce x Zr1− x O2 solid solutions ( x = 0.25, 0.5, 0.75) having acid/base and high surface area was synthesized for efficient production of DMC from CO2 and methanol. The as-prepared catalyst was characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscope (HRTEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Brunauer–Emmett–Teller (BET) techniques to determine the size, shape, crystal structure and phases, oxidation states, and surface properties. The characterization results reveals that Ce x Zr1− x O2 solid solutions synthesized by using modified precipitation method possess tetragonal-phase with surface Ce 4+, many oxygen defects, high BET surface area (i.e. 116 m 2 /g), distinct morphology and excellent catalytic activity. The Ce x Zr1− x O2 solid solutions showed excellent catalytic activity and stability under mild reaction conditions. The experimental results revealed that the Ce x Zr1− x O2 could be an active and reusable catalyst for the direct synthesis of DMC by modifying their morphology and surface properties.