Pd/Ce0.6Zr0.4-xYxO2 three-way nanocatalysts prepared from colloidal palladium nanoparticles - 文章详情页

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摘要：

The　0.5%(mass　fraction)　Pd/Ce0.6Zr0.4-xYxO2　(x=0,　0.03,　0.05,　0.1)　three-way　nanocatalysts　were　prepared　from　colloidal　palladium　(Pd)　nanoparticles　by　one　step　co-precipitation　(COP)　and　impregnation　(IMP)　method,　respectively.　The　effects　of　preparation　method　and　doping　amounts　of　yttrium　(Y)　on　the　three-way　activities　and　hydrothermal　stability　were　investigated.　The　results　showed　that　both　fresh　and　aged　COP　catalysts　had　higher　three-way　catalytic　activities　than　that　of　the　corresponding　IMP　samples.　For　fresh　COP　catalysts,　the　doing　of　Y　had　little　effect　on　the　three-way　catalytic　activities.　However,　Pd/Ce0.6Zr0.35Y0.05O2　showed　the　best　catalytic　performance　and　wider　air/fuel　operation　window　after　being　hydrothermal　aged　at　900　°C　for　6　h.　It　can　be　concluded　that　one　step　co-precipitation　method　is　a　promising　method　for　the　fabrication　of　three-way　nanocatalysts　from　colloidal　Pd　nanoparticles　and　an　appropriate　content　of　Y　dopant　seems　to　favor　an　enhancement　in　the　three-way　catalytic　activities　and　hydrothermal　stability　of　Pd/Ce0.6Zr0.4-xYxO2　catalysts.

关键词：

Colloidal palladium nanoparticles; Hydro-thermal stability; One step co-precipitation method; Rare earths; Three-way nanocatalysts; Yttrium doped ceria-zirconia solid solutions

作者机构：

[ 1 ] [Li, J.]Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Zhang, G.]Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [He, H.]Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Zhan, Z.]Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Liu, B.]Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Zi, X.]Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 7 ] [Qiu, W.]Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
[ 8 ] [Dai, H.]Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

通讯作者信息：

何洪
[He, H.]Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

电子邮件地址：

hehong@bjut.edu.cn

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