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Efficient Water-Splitting Electrodes Based on Laser-Induced Graphene.

Jibo Zhang, Chenhao Zhang, Junwei Sha1,2

  • 1School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University , Tianjin 300072, China.

ACS Applied Materials & Interfaces
|July 29, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed laser-induced graphene (LIG) electrodes for efficient, stable, and cost-effective water splitting. This method produces hydrogen and oxygen without carbon dioxide emissions, offering a promising energy storage solution.

Keywords:
HEROERhydrogen evolution reactionlaser-induced grapheneoxygen evolution reaction

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Electrically splitting water into hydrogen (H2) and oxygen (O2) is a key sustainable energy storage method.
  • Carbon dioxide (CO2)-free energy input is crucial for environmentally friendly water splitting.

Purpose of the Study:

  • To fabricate efficient catalytic electrodes for simultaneous H2 and O2 generation using laser-induced graphene (LIG).
  • To demonstrate a simple, stable, and effective method for complete water splitting.

Main Methods:

  • Fabrication of catalytic electrodes on a plastic sheet using laser-induced graphene (LIG).
  • Electrochemical testing of LIG electrodes for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER).
  • Assembly of electrodes in an O-ring setup for simultaneous gas generation.

Main Results:

  • LIG electrodes exhibit high porosity and electrical conductivity, facilitating efficient charge transfer.
  • High performance for HER and OER with excellent long-term stability.
  • Achieved low overpotentials for HER (100 mA/cm2) and OER (214 and 380 mV) with low Tafel slopes (54 and 49 mV/dec).
  • Simultaneous H2 and O2 generation at 10 mA/cm2 and 1.66 V with selective gas capture.

Conclusions:

  • LIG is a promising material for efficient and stable electrocatalytic electrodes.
  • The developed method offers a simple and effective route for CO2-free hydrogen and oxygen production.
  • This technology presents a viable pathway for complete water splitting and energy storage.