pH-effect on oxygen reduction activity of Fe-based electro-catalysts
pH-effect on oxygen reduction activity of Fe-based electro-catalysts
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DOI：
10.1016/j.elecom.2009.08.035
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发表时间：
2009-10-01
影响因子：
5.4
通讯作者：
Dodelet, Jean-Pol
中科院分区：
文献类型：
--
作者：
Meng, Hui;Jaouen, Frederic;Dodelet, Jean-Pol
最近，我们的小组报告了一种创新的Fe/N/C催化剂的合成，大大提高了它们在质子交换膜燃料电池（PEMFC）中的氧还原反应（ORR）的活性。本工作研究了通过球磨制备的一种这样的新型Fe/N/C-催化剂在0.1 M KOH和0.1 M HClO 4中的ORR活性，并将其与通过浸渍制备的先前Fe/N/C-催化剂的ORR活性和46重量% Pt/C的ORR活性进行比较。在pH 13下，在0.9 V下相对于球磨Fe/N/C-催化剂的RHE的体积活性，浸渍Fe/N/C催化剂和46wt%Pt/C分别为3.2、0.3和14.8Acm（-3）。球磨法制备的Fe/N/C催化剂在碱性燃料电池中具有良好的应用前景。(C)2009 Elsevier B. V.保留所有权利。
Recently, our group reported on an innovative synthesis of Fe/N/C-catalysts that considerably increased their activity for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). This work investigates the ORR-activity in 0.1 M KOH and 0.1 M HClO4 of one such new Fe/N/C-catalyst prepared by ball-milling and compares it to that of a former Fe/N/C-catalyst prepared by impregnation and to that of 46 wt% Pt/C.At pH 13, the volumetric activities at 0.9 V vs. RHE of the ball-milling Fe/N/C-catalyst, the impregnation Fe/N/C-catalyst and 46 wt% Pt/C are 3.2, 0.3 and 14.8 A cm(-3), respectively. The ball-milling Fe/N/C-catalyst is promising for alkaline fuel cells. (C) 2009 Elsevier B.V. All rights reserved.