Journal
NANOSCALE
Volume 5, Issue 12, Pages 5582-5588Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr00831b
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Funding
- Natural Science Foundation of China (NSFC) [21176179, 21222604]
- Program for New Century Excellent Talents in University [NCET-10-0611]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120032110024]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars (MoE)
- Scientific Technology Foundation of Hebei [11215633]
- Program of Introducing Talents of Discipline to Universities [B06006]
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This paper describes the synthesis of ceria catalysts with octahedron, nanorod, nanocube and spindle-like morphologies via a template-free hydrothermal method. The surface morphologies, crystal plane and physical-chemical structures were investigated via field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) and temperature-programmed desorption of ammonia and carbon dioxide (NH3-TPD and CO2-TPD). The catalytic performance over these ceria catalysts with different exposed planes were tested for dimethyl carbonate (DMC) synthesis from CO2 and methanol. The results showed that the spindle-like CeO2 showed the highest DMC yields, followed by nano-rods, nano-cubes and nano-octahedrons. A synergism among the exposed (111) plane, defect sites, and acid-basic sites was proposed to be crucial to obtaining the high reactivity of DMC formation.
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