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

研究成果: Article同行評審

39 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)153-160
頁數8
期刊Nano Energy
23
DOIs
出版狀態Published - 2016 5月 1

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 一般材料科學
  • 電氣與電子工程

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