Cu₃Mo₂O₉ Nanosheet Array as a High-Efficiency Oxygen Evolution Electrode in Alkaline Solution.

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Developing efficient catalysts for the oxygen evolution reaction (OER) is crucial for energy-saving electrolytic hydrogen generation.
• Existing catalysts often face challenges with activity and long-term stability.

Purpose of the Study:

• To synthesize and characterize a novel Cu3Mo2O9 nanosheet array on nickel foam (Cu3Mo2O9/NF) as a highly active OER catalyst.
• To evaluate the catalytic performance and durability of the developed Cu3Mo2O9/NF for OER.

Main Methods:

• Synthesis of Cu3Mo2O9 nanosheet arrays on nickel foam.
• Electrochemical characterization of the catalyst in 1.0 M KOH solution.
• Evaluation of catalytic activity and long-term durability.

Main Results:

• The Cu3Mo2O9/NF catalyst demonstrated high catalytic activity, achieving 50 mA cm-2 at an overpotential of 325 mV.
• Superior long-term durability was observed, with stable performance for over 24 hours.
• A high turnover frequency (TOF) of 0.09 mol O2 s-1 was recorded at an overpotential of 400 mV.

Conclusions:

• The Cu3Mo2O9/NF nanosheet array is a highly active and durable catalyst for the oxygen evolution reaction.
• This development shows significant potential for advancing energy-saving electrolytic hydrogen production.