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Study on catalytic performance of phosphoric acid modified CeO2 nanorod supported Pt catalyst for propane combustion
Received date: 2023-04-03
Online published: 2024-01-18
With the increasingly serious environmental pollution caused by the emission of pollution sources such as motor vehicles and petrochemicals，the structure of low-carbon alkanes represented by propane is stable，and it is difficult to achieve complete oxidation at low temperature.Therefore，it is urgent to develop high-efficiency low-temperature catalytic oxidation catalysts.The different amounts of phosphoric acid modified 1%Pt/CeO2-yPOx catalysts were synthesized by acid modification with cerium oxide nanorods as carrier.It was found that the T50 of propane catalytic combustion was reduced by 60 ℃ after phosphoric acid modification.Through XRD，TEM，EDS mapping and other characterization，it was found that Pt and P were evenly distributed on the surface of cerium oxide，and the structure of cerium oxide remained stable after phosphoric acid modification and Pt loading process.XPS and in-situ CO-DRIFTs showed that after phosphoric acid modification，the particle size of Pt on the surface of the catalyst was increased with the increase of the modification degree of phosphoric acid.There was an optimal Pt2+/Pt4+ ratio，which was beneficial to the adsorption and reaction of propane on the catalyst surface.H2-TPR and NH3-TPD showed that a large number of acid sites were generated on the surface of the catalyst after phosphoric acid modification，while phosphoric acid modification did not significantly reduce the redox ability of the catalyst，thus improving the propane combustion activity of the cerium-based catalyst.
JIN Shengshi , LIU Kaijie , LIU Qiuwen , ZHANG Yibo , YANG Xiangguang . Study on catalytic performance of phosphoric acid modified CeO2 nanorod supported Pt catalyst for propane combustion[J]. Inorganic Chemicals Industry, 2024 , 56(1) : 141 -148 . DOI: 10.19964/j.issn.1006-4990.2023-0192
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