Investigation of IrO2 electrocatalysts prepared by a sulfite-couplex route for the O2 evolution reaction in solid polymer electrolyte water electrolyzers
Investigation of IrO2 electrocatalysts prepared by a sulfite-couplex route for the O2 evolution reaction in solid polymer electrolyte water electrolyzers
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DOI：
10.1016/j.ijhydene.2010.12.080
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发表时间：
2011-07-01
影响因子：
7.2
通讯作者：
Arico, A. S.
中科院分区：
文献类型：
--
作者：
Siracusano, S.;Baglio, V.;Arico, A. S.
制备了IrO 2电催化剂，并在固体聚合物电解质（SPE）电解槽中进行了析氧反应的电化学表征。通过使用基于亚硫酸盐络合物的制备程序，在80 ° C下获得无定形氧化铱前体，将其依次在不同温度（350 ° C、400 ° C和450 ° C）下煅烧。通过X射线衍射（XRD）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）对产物进行了表征。将各种IrO 2催化剂喷涂到Nafion 115膜上，负载量为2.5 mg cm（-2），以形成阳极。使用Pt/C催化剂（Pt负载量0.5mg cm-2）作为阴极。在350 ℃下焙烧的IrO 2电池的电化学性能最好。在高电位（1.8V）下的最大电流密度为约1.75A cm-2。在2 A cm-2的加速时间测试证明了在350 ℃煅烧的IrO 2的合适的稳定性;然而，固有的稳定性似乎随着煅烧温度的增加而增加。在400 ℃下煅烧的样品可以代表性能和固有稳定性之间的良好折衷。版权所有（C）2010，氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
IrO2 electrocatalysts were prepared and electrochemically characterized for the oxygen evolution reaction in a Solid Polymer Electrolyte (SPE) electrolyzer. By using a sulfite complex-based preparation procedure, an amorphous iridium oxide precursor was obtained at 80 degrees C, which was, successively, calcined at different temperatures: 350 degrees C, 400 degrees C and 450 degrees C. A physico-chemical characterization was carried out by X Ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and X-ray-photoelectron spectroscopy (XPS). The various IrO2 catalysts were sprayed onto a Nafion 115 membrane with a loading of 2.5 mg cm(-2) to form the anode. A Pt/C catalyst (Pt loading 0.5 mg cm-2) was used as cathode. The best electrochemical performance was obtained for the cell based on the IrO2 calcined at 350 degrees C. The maximum current density at high potentials (1.8 V) was about 1.75 A cm-2. Accelerated time-tests at 2 A cm-2 demonstrated a suitable stability of the IrO2 calcined at 350 degrees C; however, the intrinsic stability appeared to increase with the calcination temperature. The sample calcined at 400 degrees C could represent a good compromise between performance and intrinsic stability. Copyright (C) 2010, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.