Abstract
Optimization of Hydrogen Sensing Performance of Pt/WO3 Gasochromic Film Fabricated by the Sol–Gel Method
Highlights
As a countermeasure against global warming, a clean energy system using hydrogen has been attracting much attention
The coloration and bleaching of films upon exposure to a certain gas is defined as gasochromism, which recently have generated considerable attention for applications to smart windows[12] and gas sensors.[9]. Tungsten trioxide using palladium or platinum as the catalyst for the dissociation of the hydrogen molecule is a typical candidate for a gasochromic material.[13]. These films are nearly transparent in air atmosphere
They change to a dark blue color with exposure to hydrogen gas.[13]. At room temperature, the gasochromic color reaction of a Pd- or Pt-loaded WO3 film readily proceeds when the film is exposed to hydrogen gas.[12]. The authors have been developing a hydrogen sensor device based on the sol–gel-derived platinum-supported tungsten trioxide (Pt/WO3) thin film and have demonstrated its performance as a sensor.[9]
Summary
As a countermeasure against global warming, a clean energy system using hydrogen has been attracting much attention. The coloration and bleaching of films upon exposure to a certain gas is defined as gasochromism, which recently have generated considerable attention for applications to smart windows[12] and gas sensors.[9] Tungsten trioxide using palladium or platinum as the catalyst for the dissociation of the hydrogen molecule is a typical candidate for a gasochromic material.[13] These films are nearly transparent in air atmosphere They change to a dark blue color with exposure to hydrogen gas.[13] At room temperature, the gasochromic color reaction of a Pd- or Pt-loaded WO3 film readily proceeds when the film is exposed to hydrogen gas.[12] The authors have been developing a hydrogen sensor device based on the sol–gel-derived platinum-supported tungsten trioxide (Pt/WO3) thin film and have demonstrated its performance as a sensor.[9]. Sensing performance in response to various conditions involving hydrogen gas was assessed
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