Снято с производства (Снято с производства) Коэффициенты катализаторов на основе церия-циркония-лантана-итрия-неодима 40CeO2-50Zr(Hf)O2-4La2O3-2Y2O3-4Nd2O3

Cerium-Zirconium-Lanthanum-Yttrium-Neodymium Catalysts Description

Cerium-Zirconium-Lanthanum-Yttrium-Neodymium Catalysts (40CeO₂-50Zr(Hf)O₂-4La₂O₃-2Y₂O₃-4Nd₂O₃) are advanced mixed oxide materials designed to optimize catalytic performance in high-temperature and redox-intensive environments. The core component, cerium oxide (CeO₂), provides outstanding oxygen storage and release capacity due to its reversible Ce⁴⁺/Ce³⁺ redox cycle. This enables the catalyst to act as an effective oxygen buffer, which is critical in maintaining optimal air-fuel ratios in automotive three-way catalytic converters.

Zirconium or hafnium oxide (Zr(Hf)O₂) contributes to enhanced thermal stability and helps prevent sintering of the catalyst particles at high temperatures, which is essential for long-term durability. The incorporation of lanthanum oxide (La₂O₃) increases the catalyst’s surface area and improves thermal resistance. Yttrium oxide (Y₂O₃) adds structural robustness, promoting phase stability and resistance to thermal shock. Neodymium oxide (Nd₂O₃) plays a key role in enhancing redox properties and stabilizing the oxygen vacancies, further improving oxygen mobility within the catalyst structure.

Together, these oxides form a homogeneous solid solution that exhibits superior catalytic activity, excellent structural stability under cyclic redox conditions, and strong resistance to sulfur poisoning and deactivation. These properties make the catalyst ideal for emission control, fuel reforming, and industrial oxidation-reduction reactions where long-term performance and efficiency are critical.

Cerium-Zirconium-Lanthanum-Yttrium-Neodymium Catalysts Applications

1. Automotive Catalytic Converters: Utilized in three-way catalysts (TWC) to convert harmful exhaust gases (CO, NOx, and hydrocarbons) into less toxic substances. The material's high oxygen storage capacity helps regulate the air-fuel ratio, ensuring optimal catalytic performance under varying engine conditions.

2. Emission Control Systems: Applied in diesel and gasoline engine after-treatment systems to reduce emissions and meet stringent environmental standards.

3. Fuel Reforming and Hydrogen Production: Employed as a support or active catalyst in processes such as steam reforming or partial oxidation of hydrocarbons for hydrogen generation due to its excellent redox behavior and thermal resistance.

4. Industrial Oxidation-Reduction Reactions: Used in chemical and petrochemical industries for oxidation of VOCs (volatile organic compounds), CO, and other pollutants, as well as in reduction reactions requiring dynamic oxygen handling.

5. Solid Oxide Fuel Cells (SOFCs): Act as a component in electrodes or interlayers in SOFC systems due to their stability and ionic conductivity.

6. Gas Sensors: Incorporated into oxygen and hydrocarbon sensors because of their sensitivity to changes in gas composition and temperature.

Cerium-Zirconium-Lanthanum-Yttrium-Neodymium Catalysts Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

Packaging: Carton, Wooden Box, or Customized.

Kindly review the packaging details provided for your reference.

Manufacturing Process

1.       Testing Method

(1)    Chemical Composition Analysis - Verified using techniques such as GDMS or XRF to ensure compliance with purity requirements.

(2)    Mechanical Properties Testing - Includes tensile strength, yield strength, and elongation tests to assess material performance.

(3)    Dimensional Inspection - Measures thickness, width, and length to ensure adherence to specified tolerances.

(4)    Surface Quality Inspection - Checks for defects such as scratches, cracks, or inclusions through visual and ultrasonic examination.

(5)    Hardness Testing - Determines material hardness to confirm uniformity and mechanical reliability.

Please refer to the SAM testing procedures for detailed information.

Cerium-Zirconium-Lanthanum-Yttrium-Neodymium Catalysts FAQs

Q1. What is this catalyst used for?

It is primarily used in automotive catalytic converters, industrial emission control, fuel reforming, and oxidation-reduction reactions due to its high oxygen storage capacity and thermal stability.

Q2. Why is the combination of multiple rare earth oxides important?

Each oxide plays a specific role—cerium provides redox activity, zirconium (or hafnium) adds thermal resistance, while lanthanum, yttrium, and neodymium enhance structural integrity, surface area, and long-term durability.

Q3. What makes this catalyst better than standard cerium-zirconium systems?

The addition of La₂O₃, Y₂O₃, and Nd₂O₃ improves resistance to thermal sintering, enhances redox cycling, and increases surface area, which boosts catalytic performance under harsh conditions.

Performance Comparison Table with Competitive Products

Ce-Zr-La-Pr Catalyst (40CeO₂-50Zr(Hf)O₂-5La₂O₃-5Pr₆O₁₁) vs. Competitive Catalysts

Related Information

1.       Common Preparation Methods

The Cerium-Zirconium-Lanthanum-Yttrium-Neodymium Catalyst (40CeO₂-50Zr(Hf)O₂-4La₂O₃-2Y₂O₃-4Nd₂O₃) is typically synthesized using a co-precipitation method in which aqueous solutions of cerium, zirconium (or hafnium), lanthanum, yttrium, and neodymium salts—usually nitrates—are mixed in stoichiometric proportions and then precipitated using a base such as ammonium hydroxide or sodium carbonate under controlled pH and stirring conditions; the resulting gel or precipitate is aged to enhance crystallinity and homogeneity, filtered, thoroughly washed to remove residual ions, and dried at moderate temperatures, followed by calcination at high temperatures (typically between 500°C and 800°C) to obtain a thermally stable, homogeneous mixed oxide with enhanced oxygen storage capacity, redox activity, and structural integrity suitable for demanding catalytic applications.