Incorporating nitrogen-doped graphene oxide dots with graphene oxide sheets for stable and effective hydrogen production through photocatalytic water decomposition

Liang Che Chen, Te Fu Yeh, Yuh-Lang Lee, Hsisheng Teng

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

This study proposes incorporating nitrogen-doped graphene oxide dots (NGODs) with graphene oxide (GO) sheets to form a stable and effective NGOD:GO composite for photocatalytic H2 production through water splitting under visible light illumination. Although Pt-deposited NGOD catalysts were active in the photocatalytic H2 production reaction, they were only moderately stable. Introducing GO sheets in light-absorbing NGODs effectively mediated the transfer of photogenerated electrons from the NGODs to the GO sheets. This vectorial electron transfer, confirmed by a photoluminescence spectroscopy analysis, led to the relocation of the reaction sites from the NGODs to the GO sheets, protecting the NGODs from attack by reaction intermediates. Moreover, the GO sheets acted as an electron sink, facilitating charge separation in the NGODs. When 3 wt% Pt was deposited on the developed NGOD:GO catalyst, the catalyst steadily catalyzed H2 production from a 10 vol% aqueous solution of triethanolamine under visible light illumination for 96 h, unlike a NGOD catalyst that exhibited an activity decay of 50% within 96 h. The apparent quantum yield of H2 under 420-nm light irradiation was 16.0%, demonstrating the high activity of the NGOD:GO catalyst.

Original languageEnglish
Pages (from-to)118-124
Number of pages7
JournalApplied Catalysis A: General
Volume521
DOIs
Publication statusPublished - 2016 Jul 5

Fingerprint

Graphite
Hydrogen production
Oxides
Graphene
Nitrogen
Decomposition
Water
Catalysts
Electrons
Lighting
Triethanolamine
Reaction intermediates
Relocation
Photoluminescence spectroscopy

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology

Cite this

@article{76531af084ed4f078d42798ec8da1255,
title = "Incorporating nitrogen-doped graphene oxide dots with graphene oxide sheets for stable and effective hydrogen production through photocatalytic water decomposition",
abstract = "This study proposes incorporating nitrogen-doped graphene oxide dots (NGODs) with graphene oxide (GO) sheets to form a stable and effective NGOD:GO composite for photocatalytic H2 production through water splitting under visible light illumination. Although Pt-deposited NGOD catalysts were active in the photocatalytic H2 production reaction, they were only moderately stable. Introducing GO sheets in light-absorbing NGODs effectively mediated the transfer of photogenerated electrons from the NGODs to the GO sheets. This vectorial electron transfer, confirmed by a photoluminescence spectroscopy analysis, led to the relocation of the reaction sites from the NGODs to the GO sheets, protecting the NGODs from attack by reaction intermediates. Moreover, the GO sheets acted as an electron sink, facilitating charge separation in the NGODs. When 3 wt{\%} Pt was deposited on the developed NGOD:GO catalyst, the catalyst steadily catalyzed H2 production from a 10 vol{\%} aqueous solution of triethanolamine under visible light illumination for 96 h, unlike a NGOD catalyst that exhibited an activity decay of 50{\%} within 96 h. The apparent quantum yield of H2 under 420-nm light irradiation was 16.0{\%}, demonstrating the high activity of the NGOD:GO catalyst.",
author = "Chen, {Liang Che} and Yeh, {Te Fu} and Yuh-Lang Lee and Hsisheng Teng",
year = "2016",
month = "7",
day = "5",
doi = "10.1016/j.apcata.2015.11.037",
language = "English",
volume = "521",
pages = "118--124",
journal = "Applied Catalysis A: General",
issn = "0926-860X",
publisher = "Elsevier",

}

TY - JOUR

T1 - Incorporating nitrogen-doped graphene oxide dots with graphene oxide sheets for stable and effective hydrogen production through photocatalytic water decomposition

AU - Chen, Liang Che

AU - Yeh, Te Fu

AU - Lee, Yuh-Lang

AU - Teng, Hsisheng

PY - 2016/7/5

Y1 - 2016/7/5

N2 - This study proposes incorporating nitrogen-doped graphene oxide dots (NGODs) with graphene oxide (GO) sheets to form a stable and effective NGOD:GO composite for photocatalytic H2 production through water splitting under visible light illumination. Although Pt-deposited NGOD catalysts were active in the photocatalytic H2 production reaction, they were only moderately stable. Introducing GO sheets in light-absorbing NGODs effectively mediated the transfer of photogenerated electrons from the NGODs to the GO sheets. This vectorial electron transfer, confirmed by a photoluminescence spectroscopy analysis, led to the relocation of the reaction sites from the NGODs to the GO sheets, protecting the NGODs from attack by reaction intermediates. Moreover, the GO sheets acted as an electron sink, facilitating charge separation in the NGODs. When 3 wt% Pt was deposited on the developed NGOD:GO catalyst, the catalyst steadily catalyzed H2 production from a 10 vol% aqueous solution of triethanolamine under visible light illumination for 96 h, unlike a NGOD catalyst that exhibited an activity decay of 50% within 96 h. The apparent quantum yield of H2 under 420-nm light irradiation was 16.0%, demonstrating the high activity of the NGOD:GO catalyst.

AB - This study proposes incorporating nitrogen-doped graphene oxide dots (NGODs) with graphene oxide (GO) sheets to form a stable and effective NGOD:GO composite for photocatalytic H2 production through water splitting under visible light illumination. Although Pt-deposited NGOD catalysts were active in the photocatalytic H2 production reaction, they were only moderately stable. Introducing GO sheets in light-absorbing NGODs effectively mediated the transfer of photogenerated electrons from the NGODs to the GO sheets. This vectorial electron transfer, confirmed by a photoluminescence spectroscopy analysis, led to the relocation of the reaction sites from the NGODs to the GO sheets, protecting the NGODs from attack by reaction intermediates. Moreover, the GO sheets acted as an electron sink, facilitating charge separation in the NGODs. When 3 wt% Pt was deposited on the developed NGOD:GO catalyst, the catalyst steadily catalyzed H2 production from a 10 vol% aqueous solution of triethanolamine under visible light illumination for 96 h, unlike a NGOD catalyst that exhibited an activity decay of 50% within 96 h. The apparent quantum yield of H2 under 420-nm light irradiation was 16.0%, demonstrating the high activity of the NGOD:GO catalyst.

UR - http://www.scopus.com/inward/record.url?scp=84949009485&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84949009485&partnerID=8YFLogxK

U2 - 10.1016/j.apcata.2015.11.037

DO - 10.1016/j.apcata.2015.11.037

M3 - Article

AN - SCOPUS:84949009485

VL - 521

SP - 118

EP - 124

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

SN - 0926-860X

ER -