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Effect of Pt/alumina catalyst preparation method on sensing performance of thermoelectric hydrogen sensor

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Abstract

We fabricated three different Pt/alumina catalysts for micro-thermoelectric hydrogen sensor (micro-THS). In the three Pt/alumina catalysts, two were prepared by impregnation of a commercial alumina with an aqueous solution of platinum (IV) chloride pentahydrate, and the third was prepared by impregnation of commercial alumina and nano-Pt with isobornyl acetate solution. To fabricate the micro-THS, the three Pt/alumina catalysts were integrated on thin membrane of the micro-THS, and its hydrogen sensing properties were investigated. The micro-THS with nano-Pt loaded alumina catalyst showed better sensing performance than those with Pt/alumina catalysts prepared by an aqueous solution of platinum (IV) chloride pentahydrate, because of effectively dispersed nano-Pt metal grain on the surface alumina grain observed by TEM. Its voltage signal was 15.7 mV for hydrogen concentration of 1% in dry air at catalyst temperature of 100°C.

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Authors and Affiliations

  1. National Institute of Advanced Industrial Science and Technology, Nagoya, 463-8560, Japan

    Y. Choi, K. Tajima, W. Shin, N. Izu, I. Matsubara & N. Murayama

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  1. Y. Choi
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  2. K. Tajima
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  3. W. Shin
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  4. N. Izu
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  5. I. Matsubara
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  6. N. Murayama
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Correspondence to W. Shin.

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Choi, Y., Tajima, K., Shin, W. et al. Effect of Pt/alumina catalyst preparation method on sensing performance of thermoelectric hydrogen sensor. J Mater Sci 41, 2333–2338 (2006). https://doi.org/10.1007/s10853-006-7154-y

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  • DOI: https://doi.org/10.1007/s10853-006-7154-y

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