Porous C3N4 nanolayers@n-graphene films as catalyst electrodes for highly efficient hydrogen evolution

Duan, Jingjing, Chen, Sheng, Jaroniec, Mietek and Qiao, Shi Zhang (2015) Porous C3N4 nanolayers@n-graphene films as catalyst electrodes for highly efficient hydrogen evolution. ACS Nano, 9 1: 931-940. doi:10.1021/nn506701x


Author Duan, Jingjing
Chen, Sheng
Jaroniec, Mietek
Qiao, Shi Zhang
Title Porous C3N4 nanolayers@n-graphene films as catalyst electrodes for highly efficient hydrogen evolution
Formatted title
Porous C3N4 nanolayers@n-graphene films as catalyst electrodes for highly efficient hydrogen evolution
Journal name ACS Nano   Check publisher's open access policy
ISSN 1936-086X
1936-0851
Publication date 2015-01-27
Year available 2015
Sub-type Article (original research)
DOI 10.1021/nn506701x
Volume 9
Issue 1
Start page 931
End page 940
Total pages 10
Place of publication Washington, DC United States
Publisher American Chemical Society
Collection year 2016
Language eng
Formatted abstract
Pt-free electrocatalysts for hydrogen evolution reaction (HER) with high activity and low price are desirable for many state-of-the-art renewable energy devices, such as water electrolysis and photoelectrochemical water splitting cells. However, the design and fabrication of such materials remain a significant challenge. This work reports the preparation of a flexible three-dimensional (3D) film by integrating porous C3N4 nanolayers with nitrogen-doped graphene sheets, which can be directly utilized as HER catalyst electrodes without substrates. This nonmetal electrocatalyst has displayed an unbeatable HER performance with a very positive onset-potential close to that of commercial Pt (8 mV vs 0 mV of Pt/C, vs RHE @ 0.5 mA cm–2), high exchange current density of 0.43 mA cm–2, and remarkable durability (seldom activity loss >5000 cycles). The extraordinary HER performance stems from strong synergistic effect originating from (i) highly exposed active sites generated by introduction of in-plane pores into C3N4 and exfoliation of C3N4 into nanosheets, (ii) hierarchical porous structure of the hybrid film, and (iii) 3D conductive graphene network.
Keyword Two-dimensional materials
Hydrogen evolution reaction
Varbon nitride nanolayers
Nitrogen doped graphene
Van der Waals heterostructure
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
Australian Institute for Bioengineering and Nanotechnology Publications
 
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