Efficient water oxidation through strongly coupled graphitic C3N4 coated cobalt hydroxide nanowires

Muhammad Tahir; Nasir Mahmood; Lun Pan; Zhen Feng Huang; Zhe Lv; Jingwen Zhang; Faheem K. Butt; Guoqiang Shen; Xiangwen Zhang; Shi Xue Dou; Ji Jun Zou

doi:10.1039/c6ta05088c

Efficient water oxidation through strongly coupled graphitic C₃N₄ coated cobalt hydroxide nanowires

Muhammad Tahir, Nasir Mahmood, Lun Pan, Zhen Feng Huang, Zhe Lv, Jingwen Zhang, Faheem K. Butt, Guoqiang Shen, Xiangwen Zhang, Shi Xue Dou, Ji Jun Zou^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The development of low cost and durable electrocatalysts for the oxygen evolution reaction (OER) for water splitting remains a great challenge. Here, we developed strongly coupled hybrid nanowires (NWs) of anion (Cl^- and CO^-) doped cobalt hydroxide coated with nanosheets of graphitic carbon nitride (Co(OH)₂@g-C₃N₄) through an in situ hydrothermal method. With 5% g-C₃N₄ added in the synthesis, we obtained perfectly coated Co(OH)₂ by g-C₃N₄ nanosheets with an overall diameter of ∼110 nm and a coating layer of ∼10 nm. The structural and compositional analyses confirm the strong interaction between g-C₃N₄ and Co(OH)₂ that makes the hybrid highly effective for the OER. As a result Co(OH)₂@g-C₃N₄ NWs exhibit an excellent over-potential of 0.32 V at 10 mA cm^-2 as well as extraordinary stability, which are better than those of the state-of-the-art noble metals (IrO₂ and RuO₂) and most reported Co- and C₃N₄-based electrocatalysts although both Co(OH)₂ and g-C₃N₄ separately display very fair performance. Furthermore, a combination of Co(OH)₂@g-C₃N₄ and Pt/C delivers a current density of 80 mA cm^-2 at 1.9 V for overall water splitting.

Original language	English
Pages (from-to)	12940-12946
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	4
Issue number	33
DOIs	https://doi.org/10.1039/c6ta05088c
Publication status	Published - 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2018.

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/c6ta05088c

Cite this

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title = "Efficient water oxidation through strongly coupled graphitic C3N4 coated cobalt hydroxide nanowires",

abstract = "The development of low cost and durable electrocatalysts for the oxygen evolution reaction (OER) for water splitting remains a great challenge. Here, we developed strongly coupled hybrid nanowires (NWs) of anion (Cl- and CO-) doped cobalt hydroxide coated with nanosheets of graphitic carbon nitride (Co(OH)2@g-C3N4) through an in situ hydrothermal method. With 5\% g-C3N4 added in the synthesis, we obtained perfectly coated Co(OH)2 by g-C3N4 nanosheets with an overall diameter of ∼110 nm and a coating layer of ∼10 nm. The structural and compositional analyses confirm the strong interaction between g-C3N4 and Co(OH)2 that makes the hybrid highly effective for the OER. As a result Co(OH)2@g-C3N4 NWs exhibit an excellent over-potential of 0.32 V at 10 mA cm-2 as well as extraordinary stability, which are better than those of the state-of-the-art noble metals (IrO2 and RuO2) and most reported Co- and C3N4-based electrocatalysts although both Co(OH)2 and g-C3N4 separately display very fair performance. Furthermore, a combination of Co(OH)2@g-C3N4 and Pt/C delivers a current density of 80 mA cm-2 at 1.9 V for overall water splitting.",

author = "Muhammad Tahir and Nasir Mahmood and Lun Pan and Huang, \{Zhen Feng\} and Zhe Lv and Jingwen Zhang and Butt, \{Faheem K.\} and Guoqiang Shen and Xiangwen Zhang and Dou, \{Shi Xue\} and Zou, \{Ji Jun\}",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2018.",

year = "2016",

doi = "10.1039/c6ta05088c",

language = "English",

volume = "4",

pages = "12940--12946",

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T1 - Efficient water oxidation through strongly coupled graphitic C3N4 coated cobalt hydroxide nanowires

AU - Tahir, Muhammad

AU - Mahmood, Nasir

AU - Pan, Lun

AU - Huang, Zhen Feng

AU - Lv, Zhe

AU - Zhang, Jingwen

AU - Butt, Faheem K.

AU - Shen, Guoqiang

AU - Zhang, Xiangwen

AU - Dou, Shi Xue

AU - Zou, Ji Jun

PY - 2016

Y1 - 2016

N2 - The development of low cost and durable electrocatalysts for the oxygen evolution reaction (OER) for water splitting remains a great challenge. Here, we developed strongly coupled hybrid nanowires (NWs) of anion (Cl- and CO-) doped cobalt hydroxide coated with nanosheets of graphitic carbon nitride (Co(OH)2@g-C3N4) through an in situ hydrothermal method. With 5% g-C3N4 added in the synthesis, we obtained perfectly coated Co(OH)2 by g-C3N4 nanosheets with an overall diameter of ∼110 nm and a coating layer of ∼10 nm. The structural and compositional analyses confirm the strong interaction between g-C3N4 and Co(OH)2 that makes the hybrid highly effective for the OER. As a result Co(OH)2@g-C3N4 NWs exhibit an excellent over-potential of 0.32 V at 10 mA cm-2 as well as extraordinary stability, which are better than those of the state-of-the-art noble metals (IrO2 and RuO2) and most reported Co- and C3N4-based electrocatalysts although both Co(OH)2 and g-C3N4 separately display very fair performance. Furthermore, a combination of Co(OH)2@g-C3N4 and Pt/C delivers a current density of 80 mA cm-2 at 1.9 V for overall water splitting.

AB - The development of low cost and durable electrocatalysts for the oxygen evolution reaction (OER) for water splitting remains a great challenge. Here, we developed strongly coupled hybrid nanowires (NWs) of anion (Cl- and CO-) doped cobalt hydroxide coated with nanosheets of graphitic carbon nitride (Co(OH)2@g-C3N4) through an in situ hydrothermal method. With 5% g-C3N4 added in the synthesis, we obtained perfectly coated Co(OH)2 by g-C3N4 nanosheets with an overall diameter of ∼110 nm and a coating layer of ∼10 nm. The structural and compositional analyses confirm the strong interaction between g-C3N4 and Co(OH)2 that makes the hybrid highly effective for the OER. As a result Co(OH)2@g-C3N4 NWs exhibit an excellent over-potential of 0.32 V at 10 mA cm-2 as well as extraordinary stability, which are better than those of the state-of-the-art noble metals (IrO2 and RuO2) and most reported Co- and C3N4-based electrocatalysts although both Co(OH)2 and g-C3N4 separately display very fair performance. Furthermore, a combination of Co(OH)2@g-C3N4 and Pt/C delivers a current density of 80 mA cm-2 at 1.9 V for overall water splitting.

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