Abstract Pd nanoparticles dispersed WO3 (Pd-WO3) gasochromic switchable films were prepared using our method combining UV irradiation and H2 gas flow at room temperature. Structural, chemical and optical switching properties of the films were evaluated and compared with those of the Pt-WO3 films prepared using the same method. It was found that the distribution of catalysts in the Pd-WO3 films was different from that in the Pt-WO3 films. The Pd-WO3 films exhibited large difference in optical transmittance in their colored and bleached states, which was similar to that of the Pt-WO3 films. However, the coloring of the Pd-WO3 films by H2 gas was a little slower than that of the Pt-WO3 films, although the bleaching of these films by air was similarly fast. It was speculated that the difference in the gasochromic properties between the Pd-WO3 and the Pt-WO3 films is likely due to the difference in the distributions of catalysts between the Pd-WO3 and the Pt-WO3 films.

中文翻译：

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WO3 气致变色薄膜的低温化学制备：基于 Pd 和 Pt 纳米颗粒分散 WO3 薄膜的结构和化学性质的比较研究

摘要 使用我们在室温下结合紫外线照射和氢气流的方法制备了 Pd 纳米颗粒分散的 WO3 (Pd-WO3) 气致变色可转换薄膜。评估了薄膜的结构、化学和光学开关特性，并与使用相同方法制备的 Pt-WO3 薄膜进行了比较。发现催化剂在 Pd-WO3 薄膜中的分布与在 Pt-WO3 薄膜中的分布不同。Pd-WO3 薄膜在其着色和漂白状态下表现出很大的光学透射率差异，这与 Pt-WO3 薄膜相似。然而，氢气对 Pd-WO3 薄膜的着色比 Pt-WO3 薄膜稍慢，尽管空气对这些薄膜的漂白同样快。