| Construction of bimetallic Pt-Pd/CeO2-ZrO2-La2O3 catalysts with different Pt/Pd ratios and its structure-activity correlations for three-way catalytic performance |
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| 引用本文： | Kai Chen,Jie Wan,Ting Wang,Qi Sun,Renxian Zhou. Construction of bimetallic Pt-Pd/CeO2-ZrO2-La2O3 catalysts with different Pt/Pd ratios and its structure-activity correlations for three-way catalytic performance[J]. 中国稀土学报(英文版), 2023, 41(6): 896-904. DOI: 10.1016/j.jre.2022.10.014 |
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| 作者姓名： | Kai Chen Jie Wan Ting Wang Qi Sun Renxian Zhou |
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| 作者单位： | 1. Institute of Catalysis,Zhejiang University;2. Energy Research Institute,Nanjing Institute of Technology;3. School of Environmental Engineering,Nanjing Institute of Technology |
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| 基金项目： | the Natural Science Foundation of Jiangsu Province (BK20201037)；;the Scientific Research Fund of Nanjing Institute of Technology (YKJ2019111)； |
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| 摘 要： | A series of Pt-Pd bimetallic catalysts supported on CeO2-ZrO2-La2O3 mixed oxides were synthesized through the conventional impregnation method.Three-way catalytic performance evaluations along with detailed physio-chemical characterizations were carried out to establish possible structure-activity correlations.Results show that on the one hand,different Pt/Pd ratios can strongly affect the TWC behaviors of Pt-Pd/CZL catalysts by modulating the synergis...
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| 收稿时间： | 2022-07-23 |
Construction of bimetallic Pt–Pd/CeO2–ZrO2–La2O3 catalysts with different Pt/Pd ratios and its structure–activity correlations for three-way catalytic performance |
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| Affiliation: | 1. Institute of Catalysis, Zhejiang University, Hangzhou 310028, China;2. Energy Research Institute, Nanjing Institute of Technology, Nanjing 211167, China;3. School of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China |
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| Abstract: | A series of Pt–Pd bimetallic catalysts supported on CeO2–ZrO2–La2O3 mixed oxides were synthesized through the conventional impregnation method. Three-way catalytic performance evaluations along with detailed physio-chemical characterizations were carried out to establish possible structure–activity correlations. Results show that on the one hand, different Pt/Pd ratios can strongly affect the TWC behaviors of Pt–Pd/CZL catalysts by modulating the synergistic effect between Pt and Pd. On the other hand, higher Pt/Pd ratio also favors better dispersion of precious metals. Such improved precious metals (PM) dispersion can promote the metal-support interaction and increase the surface oxygen vacancies concentration, thereby raising the dynamic oxygen storage/release capacity, improving the redox ability as well as enhancing the thermal stability of the Pt–Pd/CZL catalyst. Moreover, the strong metal-support interaction can augment surface oxygen vacancy concentration, thereby benefiting low temperature CO and NO reaction via augmented NOx adsorption and nitrate conversion. |
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| Keywords: | Three-way catalyst Bimetallic Metal-support interaction Dispersion Dynamic oxygen storage/release capacity Rare earths |
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