Pd–Pt alloy as a catalyst in gasochromic thin films for hydrogen sensors

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• 作者：Jae Young Shim ; Jae Dong Lee ; Jung Mo Jin ; Hyeonsik Cheong ; Se-Hee Lee
• 关键词：Palladium ; Platinum ; Hydrogen sensor ; Sputtering ; Raman spectroscopy
• 刊名：Solar Energy Materials and Solar Cells
• 出版年：2009
• 出版时间：December 2009
• 年：2009
• 卷：93
• 期：12
• 页码：2133-2137
• 全文大小：382 K

文摘

We have used Pd–Pt alloy as the catalyst in the hydrogen sensor thin film. Palladium and platinum were co-sputtered on top of a tungsten oxide layer grown by reactive sputtering. Both the sensitivity and the durability were dramatically improved over the case of a palladium single-component catalyst. The fractional change in the optical absorption on exposure to 1 % hydrogen gas was increased by a factor larger than 2, and the fractional change decreased only a little after more than 1000 cycles of repeated exposure to 1 % hydrogen and air. Moreover, the sensor film exhibited good selectivity to other organic vapors.