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

Ming Ma; Xinjian Shi; Kan Zhang; Soonwoo Kwon; Ping Li; Jung Kyu Kim; Thanh Tran Phu; Gi Ra Yi; Jong Hyeok Park

doi:10.1039/c5nr08604c

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

Ming Ma, Xinjian Shi, Kan Zhang, Soonwoo Kwon, Ping Li, Jung Kyu Kim, Thanh Tran Phu, Gi Ra Yi, Jong Hyeok Park

Department of Chemical and Biomolecular Engineering

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

24 Citations (Scopus)

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.

Original language	English
Pages (from-to)	3474-3481
Number of pages	8
Journal	Nanoscale
Volume	8
Issue number	6
DOIs	https://doi.org/10.1039/c5nr08604c
Publication status	Published - 2016 Feb 14

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Publisher Copyright:
© 2016 The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

Materials Science(all)

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10.1039/c5nr08604c

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title = "A 3D triple-deck photoanode with a strengthened structure integrality: Enhanced photoelectrochemical water oxidation",

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.",

author = "Ming Ma and Xinjian Shi and Kan Zhang and Soonwoo Kwon and Ping Li and Kim, {Jung Kyu} and Phu, {Thanh Tran} and Yi, {Gi Ra} and Park, {Jong Hyeok}",

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doi = "10.1039/c5nr08604c",

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T2 - Enhanced photoelectrochemical water oxidation

AU - Ma, Ming

AU - Shi, Xinjian

AU - Zhang, Kan

AU - Kwon, Soonwoo

AU - Li, Ping

AU - Kim, Jung Kyu

AU - Phu, Thanh Tran

AU - Yi, Gi Ra

AU - Park, Jong Hyeok

PY - 2016/2/14

Y1 - 2016/2/14

N2 - 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.

AB - 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.

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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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