Superior photoelectrochemical activity of self-assembled NiWO4-WO3 heteroepitaxy

Thi Hien Do, Chien Nguyen Van, Kai An Tsai, Le Thi Quynh, Jhih Wei Chen, Yan Cheng Lin, Yi Chun Chen, Wu Ching Chou, Chun Lin Wu, Yung Jung Hsu, Ying Hao Chu

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Self-assembled nanocomposites with a high interface-to-volume ratio offer tremendous opportunities of tailoring functionalities by a proper combination of components. In this study, we report the first fabrication of self-assembled NiWO4-WO3 heteroepitaxy and its excellent performance on photoelectrochemical water splitting. The heteroepitaxy is evidenced by a combination of x-ray diffraction and transmission electron microscopy. The energy band diagram of NiWO4-WO3 heterostructure probed by x-ray photoelectron spectroscopy suggests an efficient charge separation at their interface by injecting photo-generated electrons from NiWO4 to WO3 and holes from WO3 to NiWO4. Therefore, a great improvement in the photoelectrochemical activity of self-assembled NiWO4-WO3 heteroepitaxy was achieved (1400 μA cm-2 at 0.7 V vs. Ag/AgCl). This work delivers a new category of composite materials for promising photoelectrode in photoelectrochemical cells.

Original languageEnglish
Pages (from-to)153-160
Number of pages8
JournalNano Energy
Volume23
DOIs
Publication statusPublished - 2016 May 1

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Epitaxial growth
Photoelectrochemical cells
X rays
Photoelectron spectroscopy
Band structure
Heterojunctions
Nanocomposites
Diffraction
Transmission electron microscopy
Fabrication
Electrons
Water
Composite materials

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Do, T. H., Nguyen Van, C., Tsai, K. A., Quynh, L. T., Chen, J. W., Lin, Y. C., ... Chu, Y. H. (2016). Superior photoelectrochemical activity of self-assembled NiWO4-WO3 heteroepitaxy. Nano Energy, 23, 153-160. https://doi.org/10.1016/j.nanoen.2016.03.021
Do, Thi Hien ; Nguyen Van, Chien ; Tsai, Kai An ; Quynh, Le Thi ; Chen, Jhih Wei ; Lin, Yan Cheng ; Chen, Yi Chun ; Chou, Wu Ching ; Wu, Chun Lin ; Hsu, Yung Jung ; Chu, Ying Hao. / Superior photoelectrochemical activity of self-assembled NiWO4-WO3 heteroepitaxy. In: Nano Energy. 2016 ; Vol. 23. pp. 153-160.
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Do, TH, Nguyen Van, C, Tsai, KA, Quynh, LT, Chen, JW, Lin, YC, Chen, YC, Chou, WC, Wu, CL, Hsu, YJ & Chu, YH 2016, 'Superior photoelectrochemical activity of self-assembled NiWO4-WO3 heteroepitaxy', Nano Energy, vol. 23, pp. 153-160. https://doi.org/10.1016/j.nanoen.2016.03.021

Superior photoelectrochemical activity of self-assembled NiWO4-WO3 heteroepitaxy. / Do, Thi Hien; Nguyen Van, Chien; Tsai, Kai An; Quynh, Le Thi; Chen, Jhih Wei; Lin, Yan Cheng; Chen, Yi Chun; Chou, Wu Ching; Wu, Chun Lin; Hsu, Yung Jung; Chu, Ying Hao.

In: Nano Energy, Vol. 23, 01.05.2016, p. 153-160.

Research output: Contribution to journalArticle

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AU - Do, Thi Hien

AU - Nguyen Van, Chien

AU - Tsai, Kai An

AU - Quynh, Le Thi

AU - Chen, Jhih Wei

AU - Lin, Yan Cheng

AU - Chen, Yi Chun

AU - Chou, Wu Ching

AU - Wu, Chun Lin

AU - Hsu, Yung Jung

AU - Chu, Ying Hao

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