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Selective hydrothermal method to create patterned and photoelectrochemically effective Pt/WO3 interfaces.

Michel G C Zoontjes1, Mark Huijben, Jonas Baltrusaitis

  • 1MESA+ Institute for Nanotechnology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands .

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Summary
This summary is machine-generated.

A new hydrothermal method selectively grows tungsten oxide (WO3) on platinum (Pt) films. This Pt/WO3 interface achieves high photocurrents for efficient photoelectrochemical water splitting.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Tungsten oxide (WO3) is a promising material for photoelectrochemical applications.
  • Developing efficient synthesis methods for WO3-based photoelectrodes is crucial.
  • Previous methods often resulted in lower performance or lacked selectivity.

Purpose of the Study:

  • To develop a selective hydrothermal method for growing homogeneous WO3 layers on platinum (Pt) films.
  • To investigate the catalytic role of Pt in WO3 precursor decomposition.
  • To evaluate the photoelectrochemical performance of the resulting Pt/WO3 interface for water splitting.

Main Methods:

  • A hydrothermal method utilizing hydrogen peroxide as a precursor was employed.
  • WO3 growth was performed on Pt films patterned on silicon wafers.
  • Photoelectrochemical water splitting tests were conducted using a solar simulator.

Main Results:

  • Homogeneous WO3 layers were successfully grown on Pt films.
  • Pt was found to selectively catalyze the decomposition of the WO3 precursor.
  • The Pt/WO3 interface achieved high photocurrents of 1.1 mA/cm(2) in photoelectrochemical water splitting.
  • Performance exceeded previously reported values for hydrothermally grown WO3 on other substrates.

Conclusions:

  • The described selective hydrothermal method enables efficient fabrication of Pt/WO3 photoelectrodes.
  • The Pt/WO3 interface demonstrates significant potential for enhanced photoelectrochemical water splitting.
  • This approach offers a new strategy for implementing WO3 in advanced photoelectrochemical devices.