Influence of Solution pH on Pt Anode Catalyst in Direct Formic Acid Fuel Cells

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• 作者：Jiyong Joo ; Myounghoon Choun ; Jaehoon Jeong ; Jaeyoung Lee
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：November 6, 2015
• 年：2015
• 卷：5
• 期：11
• 页码：6848-6851
• 全文大小：275K
• ISSN：2155-5435

文摘

Formic acid has great potential for use as fuel in direct formic acid fuel cells (DFAFC). Because the catalytic activity of Pt for formate oxidation is sluggish in alkaline media, researchers have focused on using acid media in DFAFC technology. Recently, Osawa鈥檚 group demonstrated that the best reaction performance can be achieved at pH 鈮?pK_a. A systematic investigation of the HCOOH/HCOO^{鈥?/sup> oxidation in an actual single cell over a wide pH range has not yet been performed. Here, single-cell experiments confirm the direct formate pathway in HCOOH/HCOO鈥?/sup> oxidation, which leads to better oxidation kinetics at the optimal pH.}