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Related Concept Videos

Van der Waals Interactions01:24

Van der Waals Interactions

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Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.
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Voltammetry: Stripping Methods01:13

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Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
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Van der Waals Equation01:10

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The ideal gas law is an approximation that works well at high temperatures and low pressures. The van der Waals equation of state (named after the Dutch physicist Johannes van der Waals, 1837−1923) improves it by considering two factors.
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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
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Water Splitting by C60 -Supported Vanadium Single Atoms.

Gao-Lei Hou1,2, Tao Yang2, Mengyang Li2

  • 1Quantum Solid-State Physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium.

Angewandte Chemie (International Ed. in English)
|October 5, 2021
PubMed
Summary

A C60-supported vanadium atom efficiently splits water into hydrogen, a clean energy source. The C60 support significantly lowers the reaction barrier, crucial for designing advanced single-atom catalysts.

Keywords:
C60metal-support interactionsingle atom catalysissingle vanadiumwater splitting

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Area of Science:

  • Catalysis
  • Materials Science
  • Renewable Energy

Background:

  • Water splitting is vital for producing hydrogen, a clean energy carrier.
  • Understanding catalyst mechanisms is key to improving water splitting efficiency.
  • Supported single metal atoms are promising catalysts for this process.

Purpose of the Study:

  • To investigate the mechanism of water splitting catalyzed by a C60-supported vanadium atom.
  • To probe the reaction intermediates and products using infrared spectroscopy.
  • To elucidate the role of the C60 support in facilitating the reaction.

Main Methods:

  • Infrared spectroscopy to study the C60 V+ + H2O reaction.
  • Density functional theory (DFT) calculations to explore the reaction pathway.
  • Analysis of reaction intermediates, products, and energy barriers.

Main Results:

  • Observed formation of H2 from water splitting assisted by C60-supported V+.
  • Identified the entrance channel complex C60 V+(H2O) and end product C60 VO+.
  • DFT calculations revealed a spin-crossing mechanism facilitating the reaction.
  • The C60 support lowered the reaction barrier by over 70 kJ/mol.

Conclusions:

  • C60-supported vanadium atoms are effective catalysts for water splitting.
  • The C60 support plays a critical role in lowering the activation energy barrier.
  • This study highlights the importance of supports in single-atom catalysis for optimizing reaction pathways.