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Pristine Graphene Electrode in Hydrogen Evolution Reaction.

Aozhen Xie1, Ningning Xuan1, Kun Ba1

  • 1Department of Chemistry, Fudan University , Shanghai 200433, P. R. China.

ACS Applied Materials & Interfaces
|January 13, 2017
PubMed
Summary
This summary is machine-generated.

A new PMMA-assisted transfer method creates pristine graphene electrodes for enhanced hydrogen evolution reaction (HER) performance and durability. This technique improves graphene

Keywords:
atomic barrierflipped transfer methodhydrogen evolution reactionhydrophobicpristine graphene electrodesemitransparency

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Nanotechnology

Background:

  • Graphene, a 2D material, shows promise in electrochemistry but suffers from surface contamination and poor endurance.
  • Existing fabrication methods often compromise graphene's pristine surface and long-term stability.

Purpose of the Study:

  • To develop a novel method for fabricating graphene electrodes with improved surface quality and electrochemical stability.
  • To investigate the hydrogen evolution reaction (HER) performance of graphene on various substrates.
  • To explore the potential of 2D materials as protective and coupling layers for catalysts.

Main Methods:

  • A PMMA-assisted, flipped transfer technique was employed to fabricate graphene electrodes.
  • Single-layer graphene (SLG) HER performance was evaluated on substrates like SiO2, polymers, SLG, HOPG, and copper.
  • Electrochemical analysis, including Tafel slope measurements, was conducted.

Main Results:

  • The PMMA-assisted transfer method yielded graphene electrodes with pristine surfaces and prolonged lifetimes for HER.
  • Graphene, bilayer graphene (BLG), and HOPG exhibited parallel Tafel slopes, indicating shared sp2 carbon basal plane activity.
  • Single-layer graphene (SLG) and single-layer hexagonal boron nitride (SLBN) acted as semi-transparent barriers for HER on copper.

Conclusions:

  • The developed transfer method effectively overcomes graphene surface contamination and enhances electrochemical endurance.
  • Graphene's intrinsic electrochemical activity is comparable to HOPG for HER.
  • 2D materials like SLG and SLBN can serve as protective and coupling layers, opening new avenues for catalyst design.