The role of water in gasochromic WO3 films

Georg, Andreas

doi:10.1016/s0040-6090(00)01865-4

Cited by 83 publications

(35 citation statements)

References 8 publications

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“…Gasochromic windows have been introduced based on the chromic properties of WO 3 (Schweiger et al 1998;Georg et al 1998Georg et al , 2000aGeorg et al , 2000bGeorg et al , 2001aGeorg et al , 2001bGeorg et al , 2002Georg et al , 2008Opara-Krašovec et al 2000, 2002Wittwer et al 2001Wittwer et al , 2004Yaacob et al 2009) and palladium doped WO 3 (Zayat et al 1998, 2002 as stated previously in Ch.3.1. Due to its high redox potential, it is possible to colour WO 3 with hydrogen gas H 2 which is not possible for most other electrochromic materials.…”

Section: Wo3-based Gasochromic Windowsmentioning

confidence: 99%

Properties, requirements and possibilities of smart windows for dynamic daylight and solar energy control in buildings: A state-of-the-art review

Bætens

Jelle

Gustavsen

2010

Solar Energy Materials and Solar Cells

1,140

591

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A survey on prototype and currently commercial dynamic tintable smart windows has been carried out. The technologies of electrochromic, gasochromic, liquid crystal and electrophoretic or suspended-particle devices were examined and compared for dynamic daylight and solar energy control in buildings. Presently, state-of-the art commercial electrochromic windows seem most promising to reduce cooling loads, heating loads and lighting energy in buildings, where they have been found most reliable and able to modulate the transmittance up to 68 percent of the total solar spectrum. Their efficiency has already been proven in hot Californian climates, but more research is necessary to validate the products for colder climates, and to improve furthermore the commercial products in order to control the indoor climate in a more energy efficient way by reducing both heating and cooling loads.

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Section: Wo3-based Gasochromic Windowsmentioning

confidence: 99%

Properties, requirements and possibilities of smart windows for dynamic daylight and solar energy control in buildings: A state-of-the-art review

Bætens

Jelle

Gustavsen

2010

Solar Energy Materials and Solar Cells

1,140

591

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“…Georg et al had been report that the water in the film promoted the diffusion of hydrogen and improved the hydrogen gas sensing property. 15) It was reported that the water vapor also enhances the sensitivity of against the hydrogen with an increase of humidity. 16) In contrast, there is the report that the optical hydrogen gas sensing property of Pt/WO 3 declined with an increase of humidity.…”

Section: )mentioning

confidence: 99%

“…Pt catalyst loaded WO 3 thin film was prepared by the solgel process using tungsten hexachloride (WCl 6 ) and hydrogen hexachloroplatinate (H 2 PtCl 6 ·6H 2 O) as starting materials [14,15,21].…”

Section: Sample Preparationmentioning

confidence: 99%

Influence of temperature and humidity on the electrical sensing of Pt/WO<sub>3</sub> thin film hydrogen gas sensor

Yamaguchi

Imamura

Nishio

et al. 2016

J. Ceram. Soc. Japan

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Platinum catalyst loaded tungsten oxide (Pt/WO 3 ) is a promising candidate as a hydrogen gas sensor material, which can detect it through optical and electrical sensing. The sensor, which can detect the hydrogen gas stably in various environments, is strongly demanded. In this study, we prepared the Pt/WO 3 thin film by the solgel method and evaluate the dependence of the hydrogen gas sensing property on measuring temperature and humidity. Hydrogen gas sensing property of Pt/WO 3 thin film was evaluated by measuring the electrical conductivity with humid (0100% of relative humidity) hydrogen gas exposure at various temperatures. The sensing property was declined in humid atmospheres because the water molecule adsorbing on the film surface disturbed the catalytic reaction between hydrogen and Pt surface. In addition, the catalytic combustion of hydrogen molecule on Pt was also disturbed by the adsorbed water. However, the heating at 60°C can remove the effect of water molecule and the film can detect hydrogen gas stably. From these results, it was considered that the degradation of sensor response in humid atmosphere was mainly dominated by adsorbing water on Pt catalyst surface.

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“…Available switchable glazings are either (i) electrically controllable including electrochromic (EC) [22][23][24][25], liquid crystal (LC) [26][27][28], suspended particle device (SPD) [29][30][31][32][33][34][35][36] or (ii) not controllable but rather switch state when specific conditions are present, these include gasochrormic [37][38][39][40][41], thermochromic [42][43][44], thermotropic [45,46] and phase change material [47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Behaviour of a SPD switchable glazing in an outdoor test cell with heat removal under varying weather conditions

Ghosh¹,

Norton²,

Duffy³

2016

Applied Energy

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The role of water in gasochromic WO3 films

Cited by 83 publications

References 8 publications

Properties, requirements and possibilities of smart windows for dynamic daylight and solar energy control in buildings: A state-of-the-art review

Properties, requirements and possibilities of smart windows for dynamic daylight and solar energy control in buildings: A state-of-the-art review

Influence of temperature and humidity on the electrical sensing of Pt/WO<sub>3</sub> thin film hydrogen gas sensor

Behaviour of a SPD switchable glazing in an outdoor test cell with heat removal under varying weather conditions

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