Perovskite-based catalysts

 Perovskite-based catalysts, with their unique crystal structure and tunable properties, are emerging as promising materials for various catalytic applications, including NOx storage and reduction, ammonia production, water splitting, and CO2 reduction.

Here's a more detailed look:

Key Characteristics and Applications:

Versatile Catalysis:

Perovskites, with the general formula ABX3, exhibit structural flexibility and tunable electronic properties, making them suitable for a wide range of catalytic processes.

NOx Storage and Reduction (NSR):

Perovskites are being investigated for their potential in NSR systems, which are used in diesel engines to reduce NOx emissions.

Ammonia Production:

Perovskite-based catalysts are emerging as efficient and sustainable solutions for ammonia production, offering superior catalytic activity and enhanced stability.

Water Splitting:

Perovskite oxides are promising catalysts for water splitting, a process that generates hydrogen fuel, due to their structural and compositional flexibility, adjustable electronic structure, environmental friendliness, and chemical durability.

CO2 Reduction:

Perovskite-based electrocatalysts are being explored for efficient CO2 reduction, a process that converts CO2 into valuable chemicals and fuels.

Environmental Catalysis:

Perovskite catalysts are being used in advanced oxidation processes (AOPs) for the removal of organic pollutants from wastewater, and for the treatment of automotive gas exhaust and environmental clean air applications.

Syngas Upgrading:

Perovskite-based catalysts are being investigated for syngas upgrading, a process that converts syngas (a mixture of CO and H2) into valuable chemicals and fuels.

Reforming Catalysts:

Ni-based perovskites, particularly LaNiO3, have gained significant attention as reforming catalysts in recent years.

Oxygen Mobility:

Perovskites are known for their oxygen sublattice mobility, which plays a beneficial role in partial oxidation reactions.

Exsolved Perovskite Catalysts:

Exsolved perovskite catalysts, which are prepared by removing a metal component from the perovskite structure, offer benefits such as structural stability, strong metal support interaction, oxygen storage capacity, and active small particle size with good dispersion.

Advantages of Perovskite Catalysts:

Stability:

Perovskites are known for their high thermal and chemical stability, which is crucial for long-term catalytic performance.

Tunable Properties:

The composition of perovskites can be tailored to optimize their catalytic activity and selectivity for specific reactions.

Cost-Effectiveness:

Perovskites are often composed of earth-abundant elements, making them a cost-effective alternative to noble metal catalysts.

Enhanced Dispersion:

Perovskites can enhance the dispersion of active sites, leading to improved catalytic performance.

Resistant to Deactivation:

Perovskites can resist metal sintering and coke deposition, which are common causes of catalyst deactivation.