Journal
LANGMUIR
Volume 34, Issue 1, Pages 23-29Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.7b01294
Keywords
-
Funding
- Centre for Functional Nano Oxide at Hiroshima University
- Centre for Smart Materials at Hiroshima University
- Advanced Catalytic Transformation Program for Carbon Utilization (JST ACT-C Grant) of the Japan Science and Technology Agency (JST) [JPMJCR12Y2]
- JSPS KAKENHI [JP25288108]
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [JP22107011, 2206]
Ask authors/readers for more resources
The catalytic activity of zirconium oxide (ZrO2) nanocrystals for the reaction of carbon dioxide (CO2) with methanol to form dimethylcarbonate (DMC) was investigated. ZrO2 nanocrystals prepared by hydrothermal synthesis at various temperatures were compared. The size of the ZrO2 nanocrystals monotonically increased with the hydrothermal temperature, according to specific surface area, transmission electron microscope measurements, and their X-ray diffraction peak widths. The ZrO2 nanocrystals prepared by hydrothermal synthesis were found to exhibit high catalytic activity owing to their high surface area and catalytically active surfaces arising from their high crystallinity. Next, adsorbed species generated from CO2 on the ZrO2 surfaces were measured using CO2 temperature-programmed desorption (TPD) and in situ FT-IR spectroscopy. The results confirmed the presence of several kinds of adsorbed species including bidentate bicarbonate (b-HCO3-), bidentate carbonate (b-CO32-), and monodentate carbonate (m-CO32-). The relationship between the amounts of these surface species and the catalytic activity of the ZrO2 was investigated for the first time. The amount of the bidentate species (b-HCO3- and b-CO32-) was found to correlate well with the catalytic activity, demonstrating that the surface sites that afford these species contribute to the catalytic activity for this reaction.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available