Related Experiment Video
Updated: Aug 5, 2026
11:07
Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
Published on: August 15, 2015
10.0K
Development of a thermally stable Pt catalyst by redispersion between CeO2 and Al2O3
Li Lan1,2, Xin Huang3, Weiqi Zhou3
1College of Materials and Mechatronics, Jiangxi Science and Technology Normal University Nanchang 330013 P.R. China.
RSC Advances
|April 15, 2022
Summary
A modified synthesis of platinum (Pt) on cerium oxide (CeO2) and alumina (Al2O3) catalysts enhances thermal stability. The new CeO2/Pt/Al2O3 (Ce/Pt/Al) catalyst shows improved Pt dispersion and superior three-way catalytic performance after aging.
Area of Science:
- Materials Science
- Catalysis
- Chemical Engineering
Background:
- Platinum (Pt) catalysts supported on cerium oxide (CeO2)-alumina (Al2O3) are crucial for thermal stability.
- Metal-support interactions between Pt and CeO2 are key to inhibiting Pt aggregation and enhancing catalyst longevity.
Purpose of the Study:
- To prepare a highly thermostable Pt catalyst by modifying the synthesis of conventional Pt/CeO2/Al2O3 (Pt/Ce/Al) catalysts.
- To investigate the aging behavior and catalytic performance of a novel CeO2/Pt/Al2O3 (Ce/Pt/Al) catalyst.
Main Methods:
- Modified synthesis procedure: CeO2 introduced after Pt deposition on Al2O3.
- Hydrothermal aging process to simulate catalyst deactivation.
- Analysis of Pt species redispersion, metal-support interaction, and oxidation state.
Main Results:
- The Ce/Pt/Al catalyst exhibited distinct aging behavior compared to Pt/Ce/Al.
- Hydrothermal aging induced redispersion of Pt onto CeO2, strengthening the Pt-CeO2 interaction.
- Formation of Pt-O-Ce bonds anchored Pt species, preventing aggregation and maintaining an oxidative state.
Conclusions:
- The modified synthesis route yields a highly thermostable Pt catalyst.
- Enhanced metal-support interaction via Pt-O-Ce bonds improves catalyst durability.
- The Ce/Pt/Al catalyst demonstrates superior reduction capability and three-way catalytic performance post-aging.
More Related Videos
Related Concept Videos
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
01:22Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...