| Pd/CZ三效催化剂中钯的团聚现象研究 |
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| 引用本文： | 黄政文,郭伟琦,江治,上官文峰,顾顺超,平野真一. Pd/CZ三效催化剂中钯的团聚现象研究[J]. 分子催化, 2019, 33(1): 10-18 |
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| 作者姓名： | 黄政文 郭伟琦 江治 上官文峰 顾顺超 平野真一 |
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| 作者单位： | 上海交通大学 燃烧与环境技术中心, 上海 200240,上海交通大学 燃烧与环境技术中心, 上海 200240,上海交通大学 燃烧与环境技术中心, 上海 200240,上海交通大学 燃烧与环境技术中心, 上海 200240,上海交通大学 平野材料创新研究所, 上海 20024,上海交通大学 平野材料创新研究所, 上海 20024 |
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| 基金项目： | 国家自然科学基金（U1832155） |
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| 摘 要： | 通过浸渍法制备了一系列负载0.5%（重量百分比）Pd的氧化铈-氧化锆（NDK-84，由日本新日本电工株式会社提供）催化剂材料，并通过全面的表征手段，包括扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HR-TEM）、元素分布、X-射线衍射（XRD），氮气吸脱附测试与比表面积和孔径分布分析（BET）、X射线光电子能谱（XPS）等，研究了不同Pd前驱体和不同热老化处理条件、H2还原条件对Pd在铈锆固溶体上的分散、生长与烧结行为的影响，并评估了它们的三效催化活性.结果表明，热老化处理过程与还原过程显著影响了Pd在氧化物载体表面上的分散，因此导致不同的催化活性.
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| 关 键 词： | 铈锆固溶体 钯 烧结 团聚 三效催化 |
| 收稿时间： | 2018-11-29 |
| 修稿时间： | 2019-01-04 |
Study on the Growth Behavior of Pd Catalysts Supported on Ceria-zirconia (CZ) for Purifying Automobile Exhaust Gas |
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| HUANG Zheng-wen,GUO Wei-qi,JIANG Zhi,SHANGGUAN Wen-feng,GU Shun-chao and HIRANO Shin-ichi. Study on the Growth Behavior of Pd Catalysts Supported on Ceria-zirconia (CZ) for Purifying Automobile Exhaust Gas[J]. Journal of Molecular Catalysis (China), 2019, 33(1): 10-18 |
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| Authors: | HUANG Zheng-wen GUO Wei-qi JIANG Zhi SHANGGUAN Wen-feng GU Shun-chao HIRANO Shin-ichi |
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| Affiliation: | Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, China,Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, China,Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, China,Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, China,Research Center for Hirano Institute of Materials Innovation, Shanghai Jiao Tong University, Shanghai 200240, China and Research Center for Hirano Institute of Materials Innovation, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | A series of 0.5% Pd-loaded ceria-zirconia catalysts (NDK-84, provided by Nippon Denko Co., Ltd.) were prepared by wet impregnation method. The obtained samples were fully characterized by Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), High-Resolution Transmission Electron Microscope (HR-TEM), X-ray diffraction (XRD), N2-adsorption and desorption measurement, specific surface area and pore analysis (BET) and X-ray photoelectron spectroscopy (XPS) etc. The influence of different Pd-precursors, the thermal aging treatment conditions and the H2 reduction treatment on Pd dispersion, growing and sintering behavior on NDK-84 were investigated. The three-way catalytic activities of the samples were evaluated. The result shows that the thermal aging and reduction process significantly influence the dispersion of Pd on the oxide surface, hence lead to different catalytic activity. |
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| Keywords: | ceria-zirconium solid solution palladium sintering agglomeration three-way catalyst |
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