I–V characteristics of a methanol sensor for direct methanol fuel cell (DMFC) as a function of deposited platinum (Pt) thickness

✍ Scribed by Jin Seok Yang; Jung Ho Park; Seong-Il Kim; Seo Young Kim; Yong Tae Kim; Il Ki Han

• Book ID: 104051458
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 620 KB
• Volume: 39
• Category: Article
• ISSN: 0026-2692
• DOI: 10.1016/j.mejo.2007.12.023

✦ Synopsis

We have fabricated methanol sensor for monitoring the methanol concentration in direct methanol fuel cells. A thin composite nafion membrane was used as an electrolyte. We have analyzed the I-V characteristic of the fabricated methanol sensor as functions of methanol concentration, catalyst electrode and platinum (Pt) thickness. When we measured the sensor with 10 nm Pt and at 1 V, the current value was 1.30 Â 10 À6 , 1.96 Â 10 À6 , and 2.80 Â 10 À6 A for three methanol concentration of 1, 2, and 3 M, respectively. And when the methanol concentration was fixed at 2 M, the current value of the fabricated device with Pt of 5, 10 and 15 nm was 3.06 Â 10 À6 , 1.96 Â 10 À6 , and 1.00 Â 10 À6 A, respectively.