I-V characteristics of a methanol concentration sensor for direct methanol fuel cell (DMFC) by using catalyst electrode of Pt dots

Title
I-V characteristics of a methanol concentration sensor for direct methanol fuel cell (DMFC) by using catalyst electrode of Pt dots
Authors
양진석박정호김성일김용태김영환
Keywords
Methanol sensor; DMFC; Pt dot; *2009년도 개인평가에 반영 완료
Issue Date
2010-03
Publisher
Current applied physics : the official journal of the Korean Physical Society
Citation
VOL 10, NO 2, 370-372
Abstract
In this work, the methanol sensors were fabricated by using Pt dot catalyst electrode and the level of electrochemical response was analyzed. This kind of sensors can be applicable to sensing the methanol concentration in real-time. When we measured the methanol sensor with 5 nm of Pt dot, we could get 2.00 x 10-6, 3.06 x 10-6 and 6.25 x 10-6 A of electric current value for the methanol concentration of 1, 2 and 3 mole, respectively. The measured voltage was 1 V. To optimize the sensitivity level of Pt dot catalyst electrode, the electrodes were made in H-grid shape. The distance between electrode branches was designed to be 80, 150 and 300 lm, respectively. When we measured the electric current–voltage characteristics of methanol sensor with 2 M of methanol, it was 3.06 x 10-6, 2.02 x 10-6 and 1.50 x 10-6 A, for 80, 150 and 200 ㎛, respectively. Thus it is suggested that more efficient response of methanol sensing is possible when the distance between electrodes is reduced.
URI
http://pubs.kist.re.kr/handle/201004/36666
ISSN
1567-1739
Appears in Collections:
KIST Publication > Article
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