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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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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Breaking Electrochemical Scaling Laws in Atomically Engineered van der Waals Stack Multisite Edge Catalysts.

Ding-Rui Chen1,2,3, Jeyavelan Muthu4, Jui-Teng Chang1

  • 1Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.

Nano Letters
|July 28, 2025
PubMed
Summary

We developed a platform for multisite catalysts to overcome efficiency limits in electrocatalysis for sustainable energy. This approach enhances the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for efficient water splitting.

Keywords:
2D materialsHydrogen evolution reaction (HER)Multisite catalystsOverall water splittingvan der Waals stack edges

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Electrocatalysis is crucial for energy conversion and storage but is limited by scaling laws.
  • Multisite catalysts offer a path to overcome these limitations, yet face fabrication and characterization challenges.

Purpose of the Study:

  • To present a novel platform for studying and optimizing multisite electrocatalysis.
  • To engineer van der Waals stacked 2D materials for precise control over catalytic site interactions and separations.

Main Methods:

  • Utilizing van der Waals stacked 2D materials to create catalytic edge assemblies with tunable site separations.
  • Employing electrostatic control and ab initio simulations to investigate intermediate exchange and catalytic mechanisms.

Main Results:

  • Identified multisite catalysts that surpass single-site Sabatier scaling for the hydrogen evolution reaction (HER).
  • Demonstrated that altering site separation reverts the system to single-site mechanisms, emphasizing intermediate transport.
  • Engineered bifunctional catalysts for both oxygen evolution reaction (OER) and HER, achieving efficient neutral water splitting.

Conclusions:

  • The developed platform enables the design and optimization of advanced multisite catalysts.
  • This work provides direct evidence of intermediate exchange and its importance in multisite catalysis.
  • The findings pave the way for catalytic cascade design and complex electrochemical synthesis.