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Related Concept Videos

Electrochemical Systems01:24

Electrochemical Systems

179
Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution,...
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The Electrical Double Layer01:30

The Electrical Double Layer

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In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
241

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Updated: May 3, 2026

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
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Interface charge engineering in Pd3Sn/Ru heterostructures for ultra-efficient wide-pH hydrogen evolution.

Meixia Su1, Shuocheng Qiu1, Yuhao Zhang1

  • 1School of Physical Science and Technology, Key Laboratory of Special Function Materials and Structure Design of the Ministry of Education, Lanzhou University, Lanzhou 730000, PR China.

Journal of Colloid and Interface Science
|October 7, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel palladium-tin/ruthenium (Pd₃Sn/Ru) catalyst for efficient hydrogen production via water splitting. The new catalyst demonstrates excellent performance across a wide pH range, overcoming limitations of traditional noble metal catalysts.

Keywords:
Charge reconstructionHeterostructureHydrogen evolution reactionTopological semimetal

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Noble metal catalysts like platinum (Pt) and palladium (Pd) are vital for hydrogen evolution reaction (HER) in water splitting.
  • Their performance and stability are often pH-dependent, limiting practical applications, especially in alkaline media due to low proton availability.
  • Developing catalysts with wide-pH activity is crucial for efficient and scalable hydrogen production.

Purpose of the Study:

  • To design and investigate a novel Pd₃Sn/Ru heterostructure catalyst for efficient hydrogen evolution reaction (HER) across a wide pH range.
  • To understand the underlying mechanism of enhanced HER activity through computational and experimental methods.
  • To demonstrate the catalyst's potential for practical water-splitting applications.

Main Methods:

  • Density Functional Theory (DFT) calculations to investigate interfacial charge redistribution and d-band center modulation.
  • Electrocatalytic experiments to evaluate HER activity, overpotentials, and stability in acidic and alkaline electrolytes.
  • Fabrication of Pd₃Sn/Ru heterostructure catalyst for performance testing.

Main Results:

  • The Pd₃Sn/Ru heterostructure exhibited nearly identical HER activity in acidic (0.5 M H₂SO₄) and alkaline (1.0 M KOH) electrolytes.
  • Ultralow overpotentials of 20 mV and 22 mV were achieved at 10 mA cm⁻², surpassing Pd₃Sn, Ru, and commercial platinum.
  • DFT calculations confirmed optimized hydrogen adsorption free energy due to interfacial charge transfer and d-band center shift.
  • The catalyst demonstrated excellent long-term stability (>100 h) and high Faradaic efficiency (99%).

Conclusions:

  • Heterointerface engineering of Pd₃Sn/Ru is an effective strategy to overcome the pH limitations of noble metal catalysts for HER.
  • The catalyst's wide-pH activity and high efficiency enable practical applications in water-splitting hydrogen production.
  • This approach offers a pathway for developing robust and efficient electrocatalysts for clean energy technologies.