Ni2P nanoparticle films supported on a Ti plate as an efficient hydrogen evolution cathode

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Developing efficient electrocatalysts for hydrogen evolution is crucial for clean energy technologies.
• Nickel phosphides are promising but often require high-temperature synthesis, limiting their application.

Purpose of the Study:

• To develop a low-temperature synthesis strategy for nickel phosphide (Ni2P) nanoparticle films on titanium (Ti).
• To evaluate the performance of the synthesized Ni2P/Ti electrode as a hydrogen evolution reaction (HER) cathode in acidic media.

Main Methods:

• A two-step low-temperature strategy was employed to fabricate Ni2P nanoparticle films on a Ti plate.
• Electrochemical characterization was performed to assess the catalytic activity, stability, and Faradaic efficiency of the Ni2P/Ti electrode for HER.

Main Results:

• The Ni2P/Ti electrode demonstrated remarkable catalytic activity for hydrogen evolution in acidic solutions.
• It achieved nearly 100% Faradaic efficiency and superior stability.
• The electrode required low overpotentials of 138 mV and 188 mV to reach current densities of 20 mA cm(-2) and 100 mA cm(-2), respectively.

Conclusions:

• The developed low-temperature synthesis is effective for creating highly active Ni2P/Ti HER electrocatalysts.
• The Ni2P/Ti electrode offers a promising alternative for efficient and stable hydrogen production in acidic environments.