کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5148129 | 1497376 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication and characterization of thermochemical hydrogen sensor with laminated structure
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, we reported the simple and cost-effective fabrication of thermochemical hydrogen (TCH) sensors composed of chalcogenide thin films and Pt/Al2O3 powders. Chalcogenide thin films of two types, composed of Bi2Te3 (monomorphic-type) and Bi2Te3Sb2Te3 (four-leg PN junction-type), were prepared by electrochemical deposition. The Pt/Al2O3 powder, which acts as a heating catalyst, was synthesized by impregnation of an Al2O3 powder with an aqueous solution of platinum (IV) chloride pentahydrate. Its heating process was optimized via a hydrogen-sensing evaluation to control the size of the Pt particles. The monomorphic-type TCH sensor showed an output signal of 14.2 μV in response to 10 vol% hydrogen gas, whereas an output signal of 39.6 μV was obtained from a four-leg PN junction-type TCH sensor. Even though the n-p junction-type had the same deposition area as that of the monomorphic-type, the output signal of the n-p junction TCH sensor was greater by a factor of 2.8. In addition, the monomorphic-type TCH sensor had an inferior response time (T90) of 31 s and a longer recovery time (D10) of 38 s; the four-leg PN junction-type TCH sensor had a lowest response time of 27 s and a fastest recovery time of 9 s (in 3% H2/air at room temperature).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 1, 5 January 2017, Pages 749-756
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 1, 5 January 2017, Pages 749-756
نویسندگان
Seil Kim, Yoseb Song, Hyo-Ryoung Lim, Young-Tae Kwon, Tae-Yeon Hwang, Eunpil Song, Songjun Lee, Young-In Lee, Hong-Baek Cho, Yong-Ho Choa,