Breakthrough in Sustainable Energy: Dual-Functional Catalysts for Hydrogen Production

Strategic Insights -

Researchers at Ferdowsi University of Mashhad have developed a new dual-functional catalyst that improves the efficiency of hydrogen production through electrochemical water splitting. The catalyst, composed of phosphide/layered double hydroxide (LDH) heterostructures, has shown significant enhancements in catalytic performance, reducing the overpotential and increasing the current density of hydrogen production.

Key Takeaways:

  • The Ni-Co-Mn-LDH/Ni-Co-P/NF electrode achieves an overpotential of 56 mV (vs. RHE) at a current density of 10 mA.cm(-)(2), a significant improvement compared to the Ni-Co-P/NF electrode overpotential of 103 mV at the same current density.
  • Replacing the oxygen evolution reaction (OER) with the urea oxidation reaction (UOR) in the water-splitting process enables the cell potential to achieve 1.45 V at a current density of 10 mA.cm(-)(2), a 160 mV reduction compared to that of the HER-OER combination.
  • The incorporation of LDHs with the phosphide layer increases the electrochemically active surface area (ECSA) by twofold and reduces the charge transfer resistance (R-ct) by threefold.
  • The LDH/phosphide catalysts exhibit enhanced hydrophilicity and improved bubble detachment dynamics.
  • The study demonstrates the potential of tailored heterostructures in optimizing electrocatalytic processes for hydrogen production.

Statistics:

  • 56 mV: the reduced overpotential of the Ni-Co-Mn-LDH/Ni-Co-P/NF electrode compared to the Ni-Co-P/NF electrode.
  • 10 mA.cm(-)(2): the current density achieved by the Ni-Co-Mn-LDH/Ni-Co-P/NF electrode at 56 mV overpotential.
  • 1.45 V: the reduced cell potential achieved when replacing OER with UOR in the water-splitting process.
  • 160 mV: the reduction in cell potential achieved by replacing OER with UOR.
  • 2: the fold increase in ECSA upon the incorporation of LDHs with the phosphide layer.
  • 3: the fold reduction in R-ct following the deposition of Ni-Co-Mn-LDH on Ni-Co-P.

Sources:

  • NewsRx LLC. New Sustainable Energy Findings Reported from Ferdowsi University of Mashhad (Dual-functional Electrocatalysts Based On Phosphide/ldh Heterostructures for Sustainable and Energy-saving Hydrogen Production and Urea Oxidation). Ecology, Environment & Conservation. October 17, 2025; p 425.
  • Journal of Environmental Chemical Engineering. Dual-functional Electrocatalysts Based On Phosphide/ldh Heterostructures for Sustainable and Energy-saving Hydrogen Production and Urea Oxidation. 2025;13(5).