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The Effect of Surfactants with Different Carbon Chain Lengths on the Properties of CeO2-ZrO2-Y2O3-La2O3 Materials
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Feng Xiong, Chao Chen, Dandan Liu, Haoyuan Zhao, Xu Zhang
Automobile Technology & Material | 2024, (2) : 1 - 12
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Automobile Technology & Material | 2024, (2): 1-12
The Effect of Surfactants with Different Carbon Chain Lengths on the Properties of CeO2-ZrO2-Y2O3-La2O3 Materials
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Feng Xiong, Chao Chen, Dandan Liu, Haoyuan Zhao, Xu Zhang
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  • Dongfeng Motor Corporation Research and Development Institute, Wuhan 430058
Published: 2024-02-20 doi: 10.19710/J.cnki.1003-8817.20230375
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The effects of alkyl acid surfactants with different carbon chain lengths (decanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid) on the properties of CeO2-ZrO2-Y2O3-La2O3 (CZ) materials were studied and analyzed, and the underlying mechanism of surfactants in building high performance CZ materials has also been revealed. The results of N2-adsorption/desorption, OSC, H2-TPR, and catalyst activity show that the addition of all surfactants with different carbon chain lengths during the nucleation stage of nanocrystals can increase the initial grain size of nanocrystals, thereby reducing the driving force of sintering. At the same time, the introduction of surfactants produces more oxygen vacancies in the material, thereby improving its redox performance. Among them, dodecanoic acid plays the most prominent effects improving the thermal stability and redox performance of CZ materials, the resultant CZ exhibits the lowest loss rate of specific surface area of 46.3%, the lowest reduction peak temperature of 497℃, the highest utilization rate of Ce of 39%, and consequently the best catalytic activity of its supported Pd-only TWC.

CeO2-ZrO2-Y2O3-La2O3  /  Surfactants  /  Alkyl acid  /  Carbon chain lengths  /  Pd-only TWC
Feng Xiong, Chao Chen, Dandan Liu, Haoyuan Zhao, Xu Zhang. The Effect of Surfactants with Different Carbon Chain Lengths on the Properties of CeO2-ZrO2-Y2O3-La2O3 Materials[J]. Automobile Technology & Material, 2024 , (2) : 1 -12 . DOI: 10.19710/J.cnki.1003-8817.20230375
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doi: 10.19710/J.cnki.1003-8817.20230375
  • Online Date：2025-12-24
  • Published：2024-02-20
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    Dongfeng Motor Corporation Research and Development Institute, Wuhan 430058
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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