WO3/W:BiVO4/BiVO4 graded photoabsorber electrode for enhanced photoelectrocatalytic solar light driven water oxidation

Junghyun Choi; Pitchaimuthu Sudhagar; Joo Hyun Kim; Jiseok Kwon; Jeonghyun Kim; Chiaki Terashima; Akira Fujishima; Taeseup Song; Ungyu Paik

doi:10.1039/c6cp08199a

WO₃/W:BiVO₄/BiVO₄ graded photoabsorber electrode for enhanced photoelectrocatalytic solar light driven water oxidation

Junghyun Choi, Pitchaimuthu Sudhagar, Joo Hyun Kim, Jiseok Kwon, Jeonghyun Kim, Chiaki Terashima, Akira Fujishima, Taeseup Song^*, Ungyu Paik

^*Corresponding author for this work

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

44 Citations (Scopus)

Abstract

We demonstrate the dual advantages of graded photoabsorbers in mesoporous metal oxide-based hetero interfacial photoanodes in improving photogenerated charge carrier (e^-/h⁺) separation for the solar light-driven water-oxidation process. The pre-deposition of sol-gel-derived, tungsten-doped bismuth vanadate (W:BiVO₄) onto a primary BiVO₄ water oxidation layer forms graded interfaces, which facilitate charge transfer from the primary photoabsorber to the charge transport layer, thereby superseding the thickness-controlled charge recombination at the BiVO₄ water oxidation catalyst. As a result, the WO₃/BiVO₄ hetero photoanode containing the photoactive W:BiVO₄ interfacial layer showed 130% higher photocurrent than that of the interfacial layer-free hetero photoelectrode owing to the enhanced charge separation led water oxidation process.

Original language	English
Pages (from-to)	4648-4655
Number of pages	8
Journal	Physical Chemistry Chemical Physics
Volume	19
Issue number	6
Early online date	9 Jan 2017
DOIs	https://doi.org/10.1039/c6cp08199a
Publication status	Published - 14 Feb 2017

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "WO3/W:BiVO4/BiVO4 graded photoabsorber electrode for enhanced photoelectrocatalytic solar light driven water oxidation",

abstract = "We demonstrate the dual advantages of graded photoabsorbers in mesoporous metal oxide-based hetero interfacial photoanodes in improving photogenerated charge carrier (e-/h+) separation for the solar light-driven water-oxidation process. The pre-deposition of sol-gel-derived, tungsten-doped bismuth vanadate (W:BiVO4) onto a primary BiVO4 water oxidation layer forms graded interfaces, which facilitate charge transfer from the primary photoabsorber to the charge transport layer, thereby superseding the thickness-controlled charge recombination at the BiVO4 water oxidation catalyst. As a result, the WO3/BiVO4 hetero photoanode containing the photoactive W:BiVO4 interfacial layer showed 130% higher photocurrent than that of the interfacial layer-free hetero photoelectrode owing to the enhanced charge separation led water oxidation process.",

author = "Junghyun Choi and Pitchaimuthu Sudhagar and Kim, {Joo Hyun} and Jiseok Kwon and Jeonghyun Kim and Chiaki Terashima and Akira Fujishima and Taeseup Song and Ungyu Paik",

note = "Funding Information: This work was supported by the Global Research Laboratory (GRL) Program (K20704000003TA050000310) through the National Research Foundation of Korea (KRF) funded by the Ministry of Science, ICT (Information and Communication Technologies) and Future Planning and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT (Information and Communication Technologies) and Future Planning (2016R1C1B2007299). Publisher Copyright: {\textcopyright} the Owner Societies 2017.",

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doi = "10.1039/c6cp08199a",

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T1 - WO3/W:BiVO4/BiVO4 graded photoabsorber electrode for enhanced photoelectrocatalytic solar light driven water oxidation

AU - Choi, Junghyun

AU - Sudhagar, Pitchaimuthu

AU - Kim, Joo Hyun

AU - Kwon, Jiseok

AU - Kim, Jeonghyun

AU - Terashima, Chiaki

AU - Fujishima, Akira

AU - Song, Taeseup

AU - Paik, Ungyu

N1 - Funding Information: This work was supported by the Global Research Laboratory (GRL) Program (K20704000003TA050000310) through the National Research Foundation of Korea (KRF) funded by the Ministry of Science, ICT (Information and Communication Technologies) and Future Planning and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT (Information and Communication Technologies) and Future Planning (2016R1C1B2007299). Publisher Copyright: © the Owner Societies 2017.

PY - 2017/2/14

Y1 - 2017/2/14

N2 - We demonstrate the dual advantages of graded photoabsorbers in mesoporous metal oxide-based hetero interfacial photoanodes in improving photogenerated charge carrier (e-/h+) separation for the solar light-driven water-oxidation process. The pre-deposition of sol-gel-derived, tungsten-doped bismuth vanadate (W:BiVO4) onto a primary BiVO4 water oxidation layer forms graded interfaces, which facilitate charge transfer from the primary photoabsorber to the charge transport layer, thereby superseding the thickness-controlled charge recombination at the BiVO4 water oxidation catalyst. As a result, the WO3/BiVO4 hetero photoanode containing the photoactive W:BiVO4 interfacial layer showed 130% higher photocurrent than that of the interfacial layer-free hetero photoelectrode owing to the enhanced charge separation led water oxidation process.

AB - We demonstrate the dual advantages of graded photoabsorbers in mesoporous metal oxide-based hetero interfacial photoanodes in improving photogenerated charge carrier (e-/h+) separation for the solar light-driven water-oxidation process. The pre-deposition of sol-gel-derived, tungsten-doped bismuth vanadate (W:BiVO4) onto a primary BiVO4 water oxidation layer forms graded interfaces, which facilitate charge transfer from the primary photoabsorber to the charge transport layer, thereby superseding the thickness-controlled charge recombination at the BiVO4 water oxidation catalyst. As a result, the WO3/BiVO4 hetero photoanode containing the photoactive W:BiVO4 interfacial layer showed 130% higher photocurrent than that of the interfacial layer-free hetero photoelectrode owing to the enhanced charge separation led water oxidation process.

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WO₃/W:BiVO₄/BiVO₄ graded photoabsorber electrode for enhanced photoelectrocatalytic solar light driven water oxidation

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