Lookup NU author(s): Dr Stevin Pramana
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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.
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
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
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