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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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Surface and Interface Engineering of Noble Metal Heterostructures for Superior ORR Performance: Unlocking Ultralow

Dinesh Bhalothia1, Amisha Beniwal2, Hariom Gurjar3

  • 1Department of Electronics and Communication Engineering, Manipal University Jaipur, Rajasthan, 303007, India.

Small (Weinheim an Der Bergstrasse, Germany)
|September 15, 2025
PubMed
Summary

Researchers are engineering noble metal heterostructures to create highly efficient oxygen reduction reaction (ORR) catalysts. This approach maximizes active sites, reducing the need for expensive metals like platinum and improving durability.

Keywords:
catalyst utilization efficiencylow metal loading catalystsnoble metal heterostructuresoxygen reduction reactionsurface and Interface engineering

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Noble metal catalysts, essential for oxygen reduction reaction (ORR), face limitations due to cost and scarcity.
  • Harsh redox environments in energy conversion devices necessitate robust and efficient ORR catalysts.
  • Surface and interface engineering of noble metal heterostructures presents a viable solution to these challenges.

Purpose of the Study:

  • To review recent strategies in designing surface- and interface-optimized noble metal heterostructures for ORR.
  • To highlight innovations that maximize active site utilization and enhance catalyst performance.
  • To explore the role of heterointerfaces in improving catalytic efficiency and durability.

Main Methods:

  • Systematic review of synthesis techniques for noble metal heterostructures.
  • Analysis of structural modulation approaches and their impact on catalytic activity.
  • Investigation of mechanistic insights using advanced characterization and theoretical modeling.

Main Results:

  • Tailoring surface atomic arrangements and interfacial electronic structures unlocks unprecedented catalytic efficiencies.
  • Synergistic heterojunctions enable dramatic reductions in noble metal loading.
  • Optimized heterointerfaces effectively tune adsorption energies, charge transfer, and reaction pathways.

Conclusions:

  • Surface- and interface-optimized noble metal heterostructures offer a promising route to high-performance, cost-effective ORR catalysts.
  • Further research into rational design principles is crucial for next-generation catalysts.
  • Minimizing noble metal usage while maximizing performance remains a key objective.