期刊
SURFACES AND INTERFACES
卷 33, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.surfin.2022.102198
关键词
CeZrO; Al 2 O 3 nanocatalyst; Sono-precipitation design; Irradiation power; Oxidation of carbon monoxide; Hydrogen purification
类别
资金
- Sahand University of Technology and Iran Nanotechnology Initiative Council
A series of CeZrO/Al2O3 nanocatalysts with excellent dispersion and catalytic activity in CO oxidation were synthesized using sono-precipitation method. The performance of the nanocatalysts was further enhanced with increasing sonication power.
A series of CeZrO/Al2O3 nanocatalysts were synthesized via sono-precipitation method for utilization in oxidation of CO. The XRD results showed lower intensity of active phase peaks as the sonication power increased showing higher dispersions. SEM and TEM images showed the destruction of large particle agglomerates and superior dispersion of the CeZrO particles both on the surface and into the depth of support. BET-BJH results showed that the low surface area and pore volume of the CeZrO oxide approaches the alumina's area and higher pore volume by increasing the sonication power which reached 111 m2/g in 90 W sonicated nanocatalyst. The catalytic performance results with three different CO concentrations of 1, 2 and 4% proved the effectiveness of the ultrasound energy in successful conversion of the carbon monoxide in the gas stream. The 90 W treated sample reached the 98% CO conversion at 250 degrees C and full conversion at 275 degrees C.
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