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Issue 6, 2016
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A 3D triple-deck photoanode with a strengthened structure integrality: enhanced photoelectrochemical water oxidation

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Abstract

WO3/BiVO4 is one of the attractive Type II heterojunctions for photoelectrochemical (PEC) water splitting due to its well-matched band edge positions and visible light harvesting abilities. However, two light absorption components generally suffer from poor charge collection and cannot be efficiently utilized because of non-ideal interfaces. Herein, a triple-deck three-dimensional (3D) architecture was designed through a one-step shaping process with an additional stress relaxation WO3 underlayer. The final photoanodes showed a promising photocurrent density of 5.1 mA cm−2 at 1.23 V vs. RHE under AM 1.5G illumination. Using the uniformly distributed oxygen evolution co-catalyst (OEC) layer as the outer most shell of the WO3/BiVO4/OEC triple-deck 3D structure with a dense WO3 underlayer, the water splitting efficiency was improved dramatically by facilitating the charge transfer process at the electrode/electrolyte interface.

Graphical abstract: A 3D triple-deck photoanode with a strengthened structure integrality: enhanced photoelectrochemical water oxidation

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Publication details

The article was received on 04 Dec 2015, accepted on 11 Jan 2016 and first published on 12 Jan 2016


Article type: Paper
DOI: 10.1039/C5NR08604C
Citation: Nanoscale, 2016,8, 3474-3481
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    A 3D triple-deck photoanode with a strengthened structure integrality: enhanced photoelectrochemical water oxidation

    M. Ma, X. Shi, K. Zhang, S. Kwon, P. Li, J. K. Kim, T. T. Phu, G. Yi and J. H. Park, Nanoscale, 2016, 8, 3474
    DOI: 10.1039/C5NR08604C

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