Three-way Catalytic Acitvities and Thermal Stabilities of Pd@SiO2/Ce0.4Zr0.6O2 Nanocatalysts with Core-shell Structure

doi:10.7503/cjcu20130137

Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (8): 1936.doi: 10.7503/cjcu20130137

• Physical Chemistry • Previous Articles Next Articles

Three-way Catalytic Acitvities and Thermal Stabilities of Pd@SiO₂/Ce_0.4Zr_0.6O₂ Nanocatalysts with Core-shell Structure

LIU Bei-Bei, ZHANG Gui-Zhen, HE Hong, LI Jin-Zhou, ZI Xue-Hong, QIU Wen-Ge, DAI Hong-Xing

Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Received:2013-02-06 Online:2013-08-10 Published:2013-07-19
Contact: Gui-Zhen Zhang E-mail:hehong@bjut.edu.cn

Abstract

Abstract:

A New type of Pd@SiO₂/Ce_0.4Zr_0.6O₂ three-way nanocatalyst with core-shell structure was prepared from the colloidal Pd nanoparticles. For comparison, the corresponding reference catalyst Pd/Ce_0.4Zr_0.6O₂ was synthesized. The catalysts were characterized by powder X-ray diffraction(XRD), transmission electron microscopy(TEM), nitrogen gas adsorption-desorption and temperature programmed reduction by H₂(H₂-TPR). The three-way catalytic activities and the thermal stabilities of the two kinds of catalysts with different structure were investigated. It was found that the silica shell could prevent the aggregation of Pd nanoparticles. At the same time, the silica could inhibit the redispersion of Pd species so that the loss of precious metal Pd was reduced. All results showed that the Pd@SiO₂/Ce_0.4Zr_0.6O₂ nanocatalyst with core-shell structure possessed good three-way catalytic activities and high thermal stabilities.

Key words: Core-shell structure, Three-way catalyst, Palladium, Silica, Thermal stability

CLC Number:

O643

TrendMD:

LIU Bei-Bei, ZHANG Gui-Zhen, HE Hong, LI Jin-Zhou, ZI Xue-Hong, QIU Wen-Ge, DAI Hong-Xing. Three-way Catalytic Acitvities and Thermal Stabilities of Pd@SiO₂/Ce_0.4Zr_0.6O₂ Nanocatalysts with Core-shell Structure[J]. Chem. J. Chinese Universities, 2013, 34(8): 1936.

[1]	HE Beibei, YANG Kuihua, LYU Rui. Construction of Mn-Cu Bimetal Containing Phyllosilicate Nanozyme and Evaluation of the Enzyme-like Properties [J]. Chem. J. Chinese Universities, 2022, 43(8): 20220150.
[2]	YAN Zhixuan, MA Ji, QU Jinlei, LIU Li, SUN Chong, LIU Jiwen, LIU Guangye, SUN Lishui, HE Lixia. Synthesis and Application of Modified Low Molecular Weight Polyisoprene [J]. Chem. J. Chinese Universities, 2022, 43(6): 20220066.
[3]	FAN Xiaohui, WANG Yang, YANG Yuanyuan, ZHANG Yuhong. Preparation and Properties of Gold Nanocages/Hyaluronic Acid Core-shell Nanocarriers with pH/Enzyme/ Photothermal Multiple Responses [J]. Chem. J. Chinese Universities, 2022, 43(4): 20210855.
[4]	ZHANG Jie, YIN Bo, LIU Weixin, LIU Xingping, LIAN Wenxian, TANG Shaokun. Fabrication of Boehmite Fiber-reinforced Silica Aerogels and Their Performances [J]. Chem. J. Chinese Universities, 2022, 43(11): 20220483.
[5]	GUO Biao, ZHAO Chencan, LIU Xinxin, YU Zhou, ZHOU Lijing, YUAN Hongming, ZHAO Zhen. Effects of Surface Hydrothermal Carbon Layer on the Photocatalytic Activity of Magnetic NiFe₂O₄ Octahedron [J]. Chem. J. Chinese Universities, 2022, 43(11): 20220472.
[6]	CHANG Sihui, CHEN Tao, ZHAO Liming, QIU Yongjun. Thermal Degradation Mechanism of Bio-based Polybutylactam Plasticized by Ionic Liquids [J]. Chem. J. Chinese Universities, 2022, 43(11): 20220353.
[7]	TAO Xingfu, HAN Chenglong, YANG Yang, LIU Kun. Synthesis of Aluminum Nanoparticles@Polymer Core-shell Nanostructures by Surface-initiated Polymerization [J]. Chem. J. Chinese Universities, 2022, 43(10): 20220367.
[8]	LI Yichuan, ZHU Guofu, WANG Yu, CHAI Yongming, LIU Chenguang, HE Shengbao. Effects of Substrate Surface Properties and Precursor Chemical Environment on In⁃situ Oriented Construction of Titanium Silicalite Zeolite Membranes [J]. Chem. J. Chinese Universities, 2021, 42(9): 2934.
[9]	WANG Yuxiang, YU Shen, LIU Zhan, LYU Jiamin, LI Xiaoyun, CHEN Lihua, SU Baolian. One-step Synthesis of Amorphous Silica Aluminum Support Materials with Controllable Acidity and Porosity and Catalytic Performance of Their Pd-based Catalysts [J]. Chem. J. Chinese Universities, 2021, 42(6): 1826.
[10]	HAN Yandong, HAN Mingyong, YANG Wensheng. Sol-gel Construction of Mesoporous Silica Nanomicrostructures [J]. Chem. J. Chinese Universities, 2021, 42(4): 965.
[11]	WANG Bodong, PAN Meichen, ZHUO Ying. Construction of Electrochemiluminescence Sensing Interface Based on Silver Nanoclusters-Silica Nanoparticles and Biomolecular Recognition [J]. Chem. J. Chinese Universities, 2021, 42(11): 3519.
[12]	WANG Mingxia, LIU Zhihui, ZHU Zhen, LI Lingfeng, WANG Bowei. Preparation and Properties of Nano Lithium Magnesium Silicate-chitosan-sodium Alginate Composite Scaffold Materials [J]. Chem. J. Chinese Universities, 2021, 42(10): 3240.
[13]	SONG Wenyao, ZHOU Zhanglang, YANG Xinli, CHEN Lan, GE Guanglu. Tunable Enantioselective Adsorption of the As⁃synthesized Mesoporous Silica Through Chiral Imprinting [J]. Chem. J. Chinese Universities, 2021, 42(10): 3144.
[14]	WANG Juan, WANG Linying, ZHU Dali, CUI Wenhao, WANG Yifeng, TIAN Peng, LIU Zhongmin. Progress in Direct Synthesis of High Silica Zeolite Y [J]. Chem. J. Chinese Universities, 2021, 42(1): 1.
[15]	WANG Jianyu, ZHANG Qiang, YAN Wenfu, YU Jihong. Roles of Hydroxyl Radicals in Zeolite Synthesis [J]. Chem. J. Chinese Universities, 2021, 42(1): 11.

Three-way Catalytic Acitvities and Thermal Stabilities of Pd@SiO₂/Ce_0.4Zr_0.6O₂ Nanocatalysts with Core-shell Structure

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments