Effect of the dispersants on the performance of fuel cell type CO sensor with Pt-C/Nafion electrodes

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• 作者：Yehui GuanAuthor Vitae ; Mingjun DaiAuthor Vitae ; Tong LiuAuthor Vitae ; Yingwei LiuAuthor Vitae ; Fangmeng LiuAuthor Vitae ; Xishuang Liang ; ^{liangxs@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Hui SuoAuthor Vitae ; Peng SunAuthor Vitae ; Geyu Lu ; ^{lugy@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：CO sensor ; Nafion membrane ; Pt/C catalyst ; Organic dispersants ; Ethylene glycol
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：230
• 期：Complete
• 页码：61-69
• 全文大小：3285 K

文摘

A fuel-cell-type gas sensor based on the membrane electrode assemble (MEA) composed of proton exchange membrane (Nafion) and Pt/C sensing electrodes was fabricated for detection of CO at room temperature. The Pt/C electrodes materials were synthesized from Vulcan XC-72 carbon powders and hexachloroplatinic acid (H₂PtCl₆). This paper mainly focused on the effect of various dispersants (ethylene glycol (EG) tetraethyl orthosilicate (TEOS), glycerol and EG/polytetrafluoro-ethylene (PTFE)) on the performance of the presented sensor. Results revealed that the sensor utilizing EG as the dispersant elicited the highest response current toward 50 ppm CO. The current of the sensor was linearly correlated with CO concentration in the range of 1–200 ppm, which sensitivity was 88 nA/ppm. In addition, the 90% response and recovery times of the sensor toward 50 ppm CO were 22 and 24 s, respectively. Besides, the prepared CO sensor also had a good repeatability and acceptable selectivity.