Porous tremella-like NiMoP/CoP network electrodes as an efficient electrocatalyst

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Efficient electrocatalysts are crucial for water electrolysis, particularly for the hydrogen evolution reaction (HER).
• Developing cost-effective and stable alternatives to precious metal catalysts remains a significant challenge.

Purpose of the Study:

• To synthesize a novel hierarchical electrocatalyst for enhanced HER performance.
• To investigate the structural and electrochemical properties of the synthesized material.

Main Methods:

• Hydrothermal synthesis followed by low-temperature phosphating to create tremella-like NiMoP/CoP structures on nickel foam (NF).
• Electrochemical characterization including overpotential and Tafel slope measurements.

Main Results:

• The NiMoP/CoP/NF electrocatalyst exhibited excellent catalytic activity for HER.
• Achieved an ultralow overpotential of 38 mV at 10 mA cm⁻² and a Tafel slope of 83 mV dec⁻¹.
• The hierarchical structure enhances redox active centers, electrical conductivity, and reduces ion diffusion paths.

Conclusions:

• The synthesized NiMoP/CoP/NF catalyst demonstrates superior performance for the hydrogen evolution reaction.
• The straightforward synthesis and exceptional properties suggest its potential as a cost-effective replacement for precious metal catalysts in water electrolysis.