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

Lookup NU author(s): Dr Stevin PramanaORCiD

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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. © 2013 The Royal Society of Chemistry.

Publication metadata

Author(s): Lee R-L, Tran PD, Pramana SS, Chiam SY, Ren Y, Meng S, Wong LH, Barber J

Publication type: Article

Publication status: Published

Journal: Catalysis Science and Technology

Year: 2013

Volume: 3

Issue: 7

Pages: 1694-1698

Print publication date: 01/07/2013

Online publication date: 04/03/2013

ISSN (print): 2044-4753

ISSN (electronic): 2044-4761

Publisher: Royal Society of Chemistry

URL: https://doi.org/10.1039/c3cy00054k

DOI: 10.1039/c3cy00054k

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