Assembling graphitic-carbon-nitride with cobalt-oxide-phosphate to construct an efficient hybrid photocatalyst for water splitting application

Rui Lin Lee; Phong D. Tran; Stevin S. Pramana; Sing Yang Chiam; Yi Ren; Siyuan Meng; Lydia H. Wong; James Barber

doi:10.1039/c3cy00054k

Assembling graphitic-carbon-nitride with cobalt-oxide-phosphate to construct an efficient hybrid photocatalyst for water splitting application

Rui Lin Lee, Phong D. Tran^*, Stevin S. Pramana, Sing Yang Chiam, Yi Ren, Siyuan Meng, Lydia H. Wong, James Barber

^*Corresponding author for this work

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

58 Citations (Scopus)

Abstract

A scalable method to load a cobalt-oxide-phosphate (CoPi) water oxidation electrocatalyst onto the surface of a mesoporous graphitic-carbon-nitride (mpg-CN_x) semiconductor is reported. This procedure resulted in significant enhancement of photocatalytic activity of the mpg-CN_x in water oxidation. The optimal loading gave an oxygen evolution rate of up to approximately 1 mmol O₂ g_cat^-1 h^-1 under 100 mW cm^-2 visible light illumination in a pH 7 phosphate buffer containing Ag⁺ or Na₂S₂O₈ as an electron scavenger which was 400 times faster compared with that of the untreated mpg-CN_x catalyst. Under visible light illumination and by employing a hole scavenger e.g. methanol, CoPi was converted into a H ₂-CoCat HER electrocatalyst which significantly promoted the H ₂ generation photocatalytic activities of mpg-CN_x. Without any electron/hole scavengers, the mpg-CN_x-CoPi-H₂-CoCat composite was able to catalyse the overall water splitting process.

Original language	English
Pages (from-to)	1694-1698
Number of pages	5
Journal	Catalysis Science and Technology
Volume	3
Issue number	7
DOIs	https://doi.org/10.1039/c3cy00054k
Publication status	Published - Jul 2013
Externally published	Yes

ASJC Scopus Subject Areas

Catalysis

UN SDGs

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

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title = "Assembling graphitic-carbon-nitride with cobalt-oxide-phosphate to construct an efficient hybrid photocatalyst for water splitting application",

abstract = "A scalable method to load a cobalt-oxide-phosphate (CoPi) water oxidation electrocatalyst onto the surface of a mesoporous graphitic-carbon-nitride (mpg-CNx) semiconductor is reported. This procedure resulted in significant enhancement of photocatalytic activity of the mpg-CNx in water oxidation. The optimal loading gave an oxygen evolution rate of up to approximately 1 mmol O2 gcat-1 h-1 under 100 mW cm-2 visible light illumination in a pH 7 phosphate buffer containing Ag+ or Na2S2O8 as an electron scavenger which was 400 times faster compared with that of the untreated mpg-CNx catalyst. Under visible light illumination and by employing a hole scavenger e.g. methanol, CoPi was converted into a H 2-CoCat HER electrocatalyst which significantly promoted the H 2 generation photocatalytic activities of mpg-CNx. Without any electron/hole scavengers, the mpg-CNx-CoPi-H2-CoCat composite was able to catalyse the overall water splitting process.",

author = "Lee, {Rui Lin} and Tran, {Phong D.} and Pramana, {Stevin S.} and Chiam, {Sing Yang} and Yi Ren and Siyuan Meng and Wong, {Lydia H.} and James Barber",

year = "2013",

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doi = "10.1039/c3cy00054k",

language = "English",

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journal = "Catalysis Science and Technology",

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T1 - Assembling graphitic-carbon-nitride with cobalt-oxide-phosphate to construct an efficient hybrid photocatalyst for water splitting application

AU - Lee, Rui Lin

AU - Tran, Phong D.

AU - Pramana, Stevin S.

AU - Chiam, Sing Yang

AU - Ren, Yi

AU - Meng, Siyuan

AU - Wong, Lydia H.

AU - Barber, James

PY - 2013/7

Y1 - 2013/7

N2 - A scalable method to load a cobalt-oxide-phosphate (CoPi) water oxidation electrocatalyst onto the surface of a mesoporous graphitic-carbon-nitride (mpg-CNx) semiconductor is reported. This procedure resulted in significant enhancement of photocatalytic activity of the mpg-CNx in water oxidation. The optimal loading gave an oxygen evolution rate of up to approximately 1 mmol O2 gcat-1 h-1 under 100 mW cm-2 visible light illumination in a pH 7 phosphate buffer containing Ag+ or Na2S2O8 as an electron scavenger which was 400 times faster compared with that of the untreated mpg-CNx catalyst. Under visible light illumination and by employing a hole scavenger e.g. methanol, CoPi was converted into a H 2-CoCat HER electrocatalyst which significantly promoted the H 2 generation photocatalytic activities of mpg-CNx. Without any electron/hole scavengers, the mpg-CNx-CoPi-H2-CoCat composite was able to catalyse the overall water splitting process.

AB - A scalable method to load a cobalt-oxide-phosphate (CoPi) water oxidation electrocatalyst onto the surface of a mesoporous graphitic-carbon-nitride (mpg-CNx) semiconductor is reported. This procedure resulted in significant enhancement of photocatalytic activity of the mpg-CNx in water oxidation. The optimal loading gave an oxygen evolution rate of up to approximately 1 mmol O2 gcat-1 h-1 under 100 mW cm-2 visible light illumination in a pH 7 phosphate buffer containing Ag+ or Na2S2O8 as an electron scavenger which was 400 times faster compared with that of the untreated mpg-CNx catalyst. Under visible light illumination and by employing a hole scavenger e.g. methanol, CoPi was converted into a H 2-CoCat HER electrocatalyst which significantly promoted the H 2 generation photocatalytic activities of mpg-CNx. Without any electron/hole scavengers, the mpg-CNx-CoPi-H2-CoCat composite was able to catalyse the overall water splitting process.

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Assembling graphitic-carbon-nitride with cobalt-oxide-phosphate to construct an efficient hybrid photocatalyst for water splitting application

Abstract

ASJC Scopus Subject Areas

UN SDGs

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