I-V characteristics of a methanol concentration sensor for direct methanol fuel cell (DMFC) by using catalyst electrode of Pt dots
- I-V characteristics of a methanol concentration sensor for direct methanol fuel cell (DMFC) by using catalyst electrode of Pt dots
- 양진석; 박정호; 김성일; 김용태; 김영환
- Methanol sensor; DMFC; Pt dot; *2009년도 개인평가에 반영 완료
- Issue Date
- Current applied physics : the official journal of the Korean Physical Society
- VOL 10, NO 2, 370-372
- 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.
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