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Related Concept Videos

Hydrogen Bonds00:26

Hydrogen Bonds

109.6K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
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Reduction of Alkenes: Catalytic Hydrogenation02:13

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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
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An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
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Direct Hydrogen Production Promoted by Laser-Induced Water Plasma.

Qunfang Gu1,2, Yimin Zhang3, Daqiang Chen1,2

  • 1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

Nano Letters
|October 3, 2024
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Researchers explored laser-induced water plasma for clean hydrogen production. This method bypasses extreme conditions, offering a novel pathway for efficient, optically controlled energy generation.

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hydrogen productionlaser-induced water plasmanonadiabatic molecular dynamicsultrafast annealing

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Area of Science:

  • Plasma Physics
  • Materials Science
  • Computational Chemistry

Background:

  • Hydrogen is a crucial clean energy carrier for environmental sustainability.
  • Conventional hydrogen production methods often demand high temperatures, pressures, and catalysts.
  • Developing efficient and accessible hydrogen production techniques is essential.

Purpose of the Study:

  • To investigate the microscopic mechanisms of laser-induced water plasma.
  • To understand subsequent hydrogen (H2) production pathways.
  • To explore the potential for optically controllable hydrogen generation.

Main Methods:

  • Real-time time-dependent density functional theory (TD-DFT) simulations.
  • Ab initio molecular dynamics (AIMD) simulations.
  • Analysis of laser excitation, plasma generation, and particle recombination.

Main Results:

  • Intense lasers create nonequilibrium plasma in warm-dense liquid water, providing a unique reaction environment.
  • Subsequent annealing facilitates the recombination of energetic particles into H2, O2, and H2O2.
  • Energy conversion efficiency reached approximately 9.2%, influenced by annealing rate and laser wavelength.

Conclusions:

  • The study reveals atomistic mechanisms for hydrogen production via laser-induced water plasma.
  • Nonequilibrium plasma offers a viable alternative to conventional hydrogen production conditions.
  • Findings have significant implications for developing advanced, optically controlled hydrogen technologies.