Molybdenum and Niobium Codoped B-Site-Ordered Double Perovskite Catalyst for Efficient Oxygen Evolution Reaction

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• The oxygen evolution reaction (OER) is critical for sustainable energy technologies.
• Developing abundant, active, and durable OER electrocatalysts is essential.
• Double perovskite oxides offer a promising structural platform for catalysis.

Purpose of the Study:

• To synthesize and characterize a novel molybdenum and niobium codoped double perovskite oxide.
• To evaluate the electrocatalytic activity and stability of the new material for OER in alkaline media.
• To explore the potential of codoping in double perovskites for enhanced OER performance.

Main Methods:

• Synthesis of Ba₂CoMo₀.₅Nb₀.₅O₆-δ (BCMN) via a double perovskite oxide structure.
• Electrochemical characterization of BCMN for OER performance in an alkaline electrolyte.
• Assessment of catalyst stability under OER conditions.

Main Results:

• BCMN exhibited low overpotential for OER at a current density of 10 mA cm⁻².
• The codoped double perovskite demonstrated long-term stability in alkaline conditions.
• The material shows significant enhancement in OER performance.

Conclusions:

• Codoping molybdenum and niobium into a double perovskite structure is an effective strategy to enhance OER activity and durability.
• BCMN represents a highly active and robust electrocatalyst for the oxygen evolution reaction.
• This approach paves the way for designing advanced catalysts for sustainable energy applications.