首页|A novel Ce0.485Zr0.485Y0.03O2 composite oxide with surface doping of Y and its application in Pd-only three-way catalyst

A novel Ce0.485Zr0.485Y0.03O2 composite oxide with surface doping of Y and its application in Pd-only three-way catalyst

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
The ceria-zirconia compound oxide-supported noble metal Pd(Pd@CZ)is widely used in three-way catalyst.Moreover,the surface structure of CZ plays an important role in catalytic activity of Pd.However,how to regulate the surface structure of CZ and clarify the struc-ture-activity relationship is still a challenge.In this paper,a strategy is proposed to develop high activity Pd@CZ nanocatalysts by tuning Y doping sites in CZ.The pre-cipitate-deposition method is developed to prepare the novel Ce0.485Zr0.485Y0.03O2 composite with surface doping of Y(CZ-Y-S).In addition,the Pd@CZ-Y-S(Pd supported on CZ-Y-S)exhibits superior catalytic activity for HC,CO,and NO oxide,wherein,for CO and C3H6 oxidation,the low-temperature activity of Pd@CZ-Y-S is still 20％higher than that of Pd@CZ-Y-B(Y bulk doping)and commercial Pd@CZ after 1000 ℃/4 h aging.The effect mechanism is further studied by density functional theory(DFT)calculation.Compared with Pd@CZ-Y-B,Pd@CZ-Y-S shows the lower CO oxide reaction energy barriers due to the weaker adsorption strength of O2.The Y surface doping strategy could provide valuable insights for the development of highly efficient Pd@CZ catalyst with extensive applications.

Rare earthCeria-zirconia-supported PdSurface dopingExperiment and theoryCatalytic application

Zheng Zhao、Wei-Xin Zhao、Yong-Qi Zhang、Mei-Sheng Cui、Yong-Ke Hou、Dong-Ming Chen、Juan-Yu Yang、Zong-Yu Feng、Xiao-Wei Huang

展开 >

National Engineering Research Center for Rare Earth,Grirem Advanced Materials Co.Ltd.,GRINM Group Corporation Limited,Beijing 100088,China

Griem Hi-Tech Co.Ltd.,Langfang 065000,China

Rare Earth Functional Materials(Xiong'an)Innovation Venter Co.Ltd.,Baoding 071700,China

国家自然科学基金Youth Foundation of Hebei ProvinceYoung Elite Scientists Sponsorship ProgramHigh Tech Zone Science and Technology Project of YanjiaoYouth Fund Project of GRINM

52204376E2022103007CAST 2021QNRC001YJXM211211G12620223129035

2024

10.1007/s12598-023-02495-7

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(2)
  • 35