Defect-free single-layer graphene by 10 s microwave solid exfoliation and its application for catalytic water splitting
Author(s)
Type
Journal Article
Abstract
Mass production of defect-free single-layer graphene flakes (SLGFs) by a cost-effective approach is still very challenging. Here, we report such single-layer graphene flakes (SLGFs) (>90%) prepared by a nondestructive, energy-efficient, and easy up-scalable physical approach. These high-quality graphene flakes are attributed to a novel 10 s microwave-modulated solid-state approach, which not only fast exfoliates graphite in air but also self-heals the surface of graphite to remove the impurities. The fabricated high-quality graphene films (∼200 nm) exhibit a sheet resistance of ∼280 Ω/sq without any chemical or physical post-treatment. Furthermore, graphene-incorporated Ni–Fe electrodes represent a remarkable ∼140 mA/cm2 current for the catalytic water oxidation reaction compared with the pristine Ni–Fe electrode (∼10 mA/cm2) and a 120 mV cathodic shift in onset potential under identical experimental conditions, together with a faradic efficiency of >90% for an ideal ratio of H2 and O2 production from water. All these excellent performances are attributed to extremely high conductivity of the defect-free graphene flakes.
Date Issued
2021-06-10
Date Acceptance
2021-05-30
Citation
ACS Applied Materials and Interfaces, 2021, 13 (24), pp.28600-28609
ISSN
1944-8244
Publisher
American Chemical Society
Start Page
28600
End Page
28609
Journal / Book Title
ACS Applied Materials and Interfaces
Volume
13
Issue
24
Copyright Statement
Copyright © 2022 The Authors. Published by American Chemical Society. This publication is licensed under
CC-BY 4.0.
CC-BY 4.0.
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000667982100084&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
conductivity
defect-free single-layer graphene
EFFICIENCY
fast production
FILMS
GRAPHITE
INTERCALATION COMPOUNDS
Materials Science
Materials Science, Multidisciplinary
Nanoscience & Nanotechnology
OXYGEN
oxygen evolution reaction
RAMAN-SPECTROSCOPY
Science & Technology
Science & Technology - Other Topics
special mode microwave-intensified process
Technology
TRANSPARENT
water splitting
Publication Status
Published
Date Publish Online
2021-06-10