表面覆盖SiO2用于提高Pt-Pd/CeO2-ZrO2-Al2O3商用柴油机氧化型催化剂的抗硫性
向Pt-Pd/CeO2-ZrO2-Al2O3（Pt-Pd/CZA）商用柴油机氧化型催化剂（DOC）中加入多孔SiO2以提高其抗硫性.使用多层涂覆法在Pt-Pd/CZA催化剂表面覆盖一层多孔SiO2,从而制得SiO2/Pt-Pd/CeO2-ZrO2-Al2O3（SiO2/Pt-Pd/CZA）抗硫DOC.并使用扫描电子显微镜（SEM）, H2程序升温还原（H2-TPR）,氮气吸脱附, X射线能谱（EDX）和热重分析（TGA）等对其进行表征. SEM结果显示, SiO2层以多孔形式均匀覆盖在催化剂表面.氮气吸脱附结果表明,所添加的SiO2的织构性质与Pt-Pd/CZA催化剂的织构性质相似,因而表面覆...
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| Published in | 物理化学学报 Vol. 30; no. 6; pp. 1187 - 1193 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
四川大学建筑与环境学院,成都,610064%四川大学化学学院，绿色化学与技术教育部重点实验室，成都610064%四川大学建筑与环境学院，成都610064
2014
四川大学化学学院，绿色化学与技术教育部重点实验室，成都610064 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-6818 |
| DOI | 10.3866/PKU.WHXB201404281 |
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| Abstract | 向Pt-Pd/CeO2-ZrO2-Al2O3（Pt-Pd/CZA）商用柴油机氧化型催化剂（DOC）中加入多孔SiO2以提高其抗硫性.使用多层涂覆法在Pt-Pd/CZA催化剂表面覆盖一层多孔SiO2,从而制得SiO2/Pt-Pd/CeO2-ZrO2-Al2O3（SiO2/Pt-Pd/CZA）抗硫DOC.并使用扫描电子显微镜（SEM）, H2程序升温还原（H2-TPR）,氮气吸脱附, X射线能谱（EDX）和热重分析（TGA）等对其进行表征. SEM结果显示, SiO2层以多孔形式均匀覆盖在催化剂表面.氮气吸脱附结果表明,所添加的SiO2的织构性质与Pt-Pd/CZA催化剂的织构性质相似,因而表面覆盖的SiO2并未明显改变Pt-Pd/CZA催化剂的比表面积和孔结构. H2-TPR结果证实表面覆盖的SiO2不影响Pt-Pd/CZA催化剂的还原性能. EDX和TGA结果说明表面覆盖SiO2可以抑制硫物种在催化剂表面的形成及累积.最终,本文所制备的SiO2/Pt-Pd/CZA催化剂在保持Pt-Pd/CZA商用DOC的高活性及耐久性的同时有效提高了其抗硫性. |
|---|---|
| AbstractList | 向Pt-Pd/CeO2-ZrO2-Al2O3（Pt-Pd/CZA）商用柴油机氧化型催化剂（DOC）中加入多孔SiO2以提高其抗硫性.使用多层涂覆法在Pt-Pd/CZA催化剂表面覆盖一层多孔SiO2,从而制得SiO2/Pt-Pd/CeO2-ZrO2-Al2O3（SiO2/Pt-Pd/CZA）抗硫DOC.并使用扫描电子显微镜（SEM）, H2程序升温还原（H2-TPR）,氮气吸脱附, X射线能谱（EDX）和热重分析（TGA）等对其进行表征. SEM结果显示, SiO2层以多孔形式均匀覆盖在催化剂表面.氮气吸脱附结果表明,所添加的SiO2的织构性质与Pt-Pd/CZA催化剂的织构性质相似,因而表面覆盖的SiO2并未明显改变Pt-Pd/CZA催化剂的比表面积和孔结构. H2-TPR结果证实表面覆盖的SiO2不影响Pt-Pd/CZA催化剂的还原性能. EDX和TGA结果说明表面覆盖SiO2可以抑制硫物种在催化剂表面的形成及累积.最终,本文所制备的SiO2/Pt-Pd/CZA催化剂在保持Pt-Pd/CZA商用DOC的高活性及耐久性的同时有效提高了其抗硫性. O643; 向Pt-Pd/CeO2-ZrO2-Al2O3(Pt-Pd/CZA)商用柴油机氧化型催化剂(DOC)中加入多孔SiO2以提高其抗硫性.使用多层涂覆法在Pt-Pd/CZA催化剂表面覆盖一层多孔SiO2,从而制得SiO2/Pt-Pd/CeO2-ZrO2-Al2O3(SiO2/Pt-Pd/CZA)抗硫DOC.并使用扫描电子显微镜(SEM), H2程序升温还原(H2-TPR),氮气吸脱附, X射线能谱(EDX)和热重分析(TGA)等对其进行表征. SEM结果显示, SiO2层以多孔形式均匀覆盖在催化剂表面.氮气吸脱附结果表明,所添加的SiO2的织构性质与Pt-Pd/CZA催化剂的织构性质相似,因而表面覆盖的SiO2并未明显改变Pt-Pd/CZA催化剂的比表面积和孔结构. H2-TPR结果证实表面覆盖的SiO2不影响Pt-Pd/CZA催化剂的还原性能. EDX和TGA结果说明表面覆盖SiO2可以抑制硫物种在催化剂表面的形成及累积.最终,本文所制备的SiO2/Pt-Pd/CZA催化剂在保持Pt-Pd/CZA商用DOC的高活性及耐久性的同时有效提高了其抗硫性. |
| Abstract_FL | In this work, porous SiO2 was added to the Pt-Pd/CeO2-ZrO2-Al2O3 (Pt-Pd/CZA) commercial diesel oxidation catalyst (DOC) to improve its sulfur resistibility. The SiO2/Pt-Pd/CeO2-ZrO2-Al2O3 (SiO2/Pt-Pd/CZA) catalyst was prepared by surface coating porous SiO2 onto the Pt-Pd/CZA monolithic commercial DOC using a multilayer coating method. The as-prepared catalysts were characterized by scanning electron microscopy (SEM), H2 temperature-programmed reduction (H2-TPR), nitrogen adsorption-desorption, energy-dispersive X-ray (EDX) spectroscopy, and thermogravimetric analysis (TGA). SEM images show that the SiO2 layer is porous and uniformly covers the surface of the catalyst. Nitrogen adsorption-desorption isotherm results imply that the texture properties of the as-added SiO2 are similar to those of the Pt-Pd/CZA catalyst, and hence the specific surface area and pore structure of the Pt-Pd/CZA catalyst do not obviously change upon cladding with SiO2. The H2-TPR results imply that the reduction property of the Pt-Pd/CZA catalyst is not obviously affected by surface cladding with SiO2. EDX spectroscopy and TGA results demonstrate that the formation and accumulation of sulfur-contained species on the Pt-Pd/CZA catalyst are suppressed by the SiO2 surface coating. Final y, the as-prepared SiO2/Pt-Pd/CZA catalyst efficiently retained its high catalytic performance and improved the sulfur resistance of the Pt-Pd/CZA commercial DOC. |
| Author | 杨铮铮 杨怡 赵明 龚茂初 陈耀强 |
| AuthorAffiliation | 四川大学建筑与环境学院,成都610064 四川大学化学学院，绿色化学与技术教育部重点实验室，成都610064 |
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| Author_FL | YANG Zheng-Zheng ZHAO Ming YANG Yi CHEN Yao-Qiang GONG Mao-Chu |
| Author_FL_xml | – sequence: 1 fullname: YANG Zheng-Zheng – sequence: 2 fullname: YANG Yi – sequence: 3 fullname: ZHAO Ming – sequence: 4 fullname: GONG Mao-Chu – sequence: 5 fullname: CHEN Yao-Qiang |
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| DOI | 10.3866/PKU.WHXB201404281 |
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| DocumentTitleAlternate | Enhanced Sulfur Resistance of Pt-Pd/CeO2-ZrO2-Al2O3 Commercial Diesel Oxidation Catalyst by SiO2 Surface Cladding |
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| Keywords | 机动车尾气 抗硫性 整体式催化剂 Multilayer coating 多层涂覆 Diesel oxidation catalyst Vehicle exhaust 柴油机氧化型催化剂 Monolithic catalyst Sulfur resistance |
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| Notes | 11-1892/06 YANG Zheng-Zheng, YANG Yi, ZHAO Ming, GONG Mao-Chu, CHEN Yao-Qiang （1 College of Architecture and Environment, Sichuan University, Chengdu 610064, P. R. China; 2 Key Laboratory of Green Chemistry ＆ Technology of the Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P.. R. China） Diesel oxidation catalyst;Sulfur resistance;Monolithic catalyst;Multilayer coating;Vehicle exhaust In this work, porous SiO2 was added to the Pt-Pd/CeO2-ZrO2-Al2O3 （Pt-Pd/CZA） commercial diesel oxidation catalyst （DOC） to improve its sulfur resistibility. The SiO2/Pt-Pd/CeO2-ZrO2-Al2O3 （SiO2/Pt-Pd/CZA） catalyst was prepared by surface coating porous SiO2 onto the Pt-Pd/CZA monolithic commercial DOC using a multilayer coating method. The as-prepared catalysts were characterized by scanning electron microscopy （SEM）, H2 temperature-programmed reduction （H2-TPR）, nitrogen adsorption-desorption, energy-dispersive X-ray （EDX） spectroscopy, and thermogravimetric analysis （TGA）. SEM images show that the |
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| PublicationYear | 2014 |
| Publisher | 四川大学建筑与环境学院,成都,610064%四川大学化学学院，绿色化学与技术教育部重点实验室，成都610064%四川大学建筑与环境学院，成都610064 四川大学化学学院，绿色化学与技术教育部重点实验室，成都610064 |
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| Snippet | 向Pt-Pd/CeO2-ZrO2-Al2O3（Pt-Pd/CZA）商用柴油机氧化型催化剂（DOC）中加入多孔SiO2以提高其抗硫性.使用多层涂覆法在Pt-Pd/CZA催化剂表面覆盖一层多孔SiO2,从而制... O643; 向Pt-Pd/CeO2-ZrO2-Al2O3(Pt-Pd/CZA)商用柴油机氧化型催化剂(DOC)中加入多孔SiO2以提高其抗硫性.使用多层涂覆法在Pt-Pd/CZA催化剂表面覆盖一层多孔SiO2,从而制... |
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| SubjectTerms | 多层涂覆 抗硫性 整体式催化剂 机动车尾气 柴油机氧化型催化剂 |
| Title | 表面覆盖SiO2用于提高Pt-Pd/CeO2-ZrO2-Al2O3商用柴油机氧化型催化剂的抗硫性 |
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