CoFeBP Micro Flowers (MFs) for Highly Efficient Hydrogen Evolution Reaction and Oxygen Evolution Reaction...

Area of Science:

• Materials Science
• Electrochemistry
• Renewable Energy

Background:

• Hydrogen is a key green energy carrier due to its high energy density and zero-carbon emissions.
• Efficient electrocatalysts are crucial for cost-effective hydrogen production through water splitting.

Purpose of the Study:

• To fabricate and optimize a novel CoFeBP micro-flower (MF) electrocatalyst for efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER).
• To evaluate the performance and stability of the CoFeBP MF electrocatalyst for large-scale hydrogen production.

Main Methods:

• Hydrothermal synthesis of CoFeBP micro-flowers.
• Systematic optimization of synthesis and post-annealing parameters.
• Electrochemical characterization including overpotential, cell voltage, and long-term stability tests.

Main Results:

• Optimized CoFeBP MF electrode achieved low HER/OER overpotentials (20 mV/219 mV at 20 mA/cm²).
• Demonstrated a low 2-electrode cell voltage of 1.60 V at 50 mA/cm², comparable to benchmarks.
• Exhibited excellent stability (>100 h) under harsh conditions (6 M KOH, 60 °C, 1000 mA/cm²).

Conclusions:

• The CoFeBP MF electrocatalyst offers a promising pathway for efficient and stable hydrogen production.
• The micro-flower morphology enhances electrochemical active surface area (ECSA), while post-annealing improves crystallinity and performance.