Modified pulse electrodeposition of Pt nanocatalyst as high-performance electrode for PEMFC
Modified pulse electrodeposition of Pt nanocatalyst as high-performance electrode for PEMFC
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DOI：
10.1016/j.jpowsour.2014.08.031
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发表时间：
2014-12-20
影响因子：
9.2
通讯作者：
AlMayouf, A. M.
中科院分区：
文献类型：
--
作者：
Fouda-Onana, F.;Guillet, N.;AlMayouf, A. M.
在H2PtCl6电解液中，以炭黑为载体直接在GDL （Gas Diffusion Layer）上制备了低铂负载电极。沉积的SEM图像由50 nm的粗糙Pt颗粒组成，其比电化学表面积为53 m(2) g（-1）。尽管质子交换膜燃料电池（PEMFC）的颗粒尺寸大，阴极负载低，为0.12 mg cm(-2)，但在80℃、1.5绝对bar条件下加湿H-2和O-2的质子交换膜燃料电池（PEMFC）达到0.2 mA cm(Pt)(-2)，在0.9 VIA-free条件下达到0.1 a mg(-1)，比阴极负载为0.4 mgpt.cm（-2）的参考膜电极组件（MEA）高两倍。这种活性阴极电极可归因于通过电化学途径有效的催化剂沉积导致铂的较高利用率。(C) 2014年Elsevier B.V.出版
Low platinum loading electrode was successfully deposited by a modified pulse galvanic signal in H2PtCl6 electrolyte using carbon black as support directly on a GDL (Gas Diffusion Layer). SEM images of the deposition were composed by rough Pt particles of 50 nm leading to specific electrochemical surface area of 53 m(2) g(-1). In spite of large particle size and a low cathode loading of 0.12 mg cm(-2), the proton exchange membrane fuel cell (PEMFC) fed with humidified H-2 and O-2 at 80 degrees C, 1.5 absolute bar reached 0.2 mA cm(Pt)(-2) and 0.1 A mg(-1) at 0.9 VIA-free which were twice higher than a reference membrane electrodes assembly (MEA) with a cathode loaded at 0.4 mgpt.cm(-2). Such an active cathode electrode may be ascribed to a higher utilization rate of the platinum caused by an efficient catalyst deposition by electrochemical route. (C) 2014 Published by Elsevier B.V.