Direct preparation of core-shell platinum cathode in membrane electrode assembly catalyst layer for polymer electrolyte fuel cell
Direct preparation of core-shell platinum cathode in membrane electrode assembly catalyst layer for polymer electrolyte fuel cell
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DOI：
10.1016/j.ijhydene.2020.03.180
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发表时间：
2020-05-21
影响因子：
7.2
通讯作者：
Sugimoto, Wataru
中科院分区：
文献类型：
--
作者：
Fukunaga, Hiroshi;Kachi, Kazuhiro;Sugimoto, Wataru
核壳型催化剂作为一种低铂含量的PEFC阴极催化剂受到人们的关注。但其大规模生产方法尚未建立。本文提出了一种适用于PEFC低铂催化层连续制备的新方法。碳载Pd@Pt核壳催化剂（Pd@Pt/C）的催化剂层是通过铜欠电位沉积（UPD）然后表面限制氧化还原置换（SLRR）直接制备到由钯核（Pd/C）制成的多孔催化剂层上。Pt和Pd在整个催化剂层中的分布很好地对应，表明在整个催化剂层中发生核-壳反应。Pd@Pt/C显示出比Pt/C高1.8倍的质量活性，这与通过常规微克级方法制备的Pd@Pt/C相当。(C)2020年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。
Core-shell catalyst has been attracting attention as a low-Pt catalyst for PEFC cathode. However, its mass production method has not yet been established. In this paper, a novel method suitable for continuous production of low-platinum catalyst layer for PEFC is proposed. Catalyst layer of carbon-supported Pd@Pt core-shell catalyst (Pd@Pt/C) is fabricated by using Cu underpotential deposition (UPD) followed by surface-limited redox replacement (SLRR) directly to the porous catalyst layer made of Pd core (Pd/C). The distribution of Pt corresponded well with that of Pd throughout the catalyst layer, indicating that the core-shell reaction occurs in the entire catalyst layer. Pd@Pt/C shows 1.8 times higher mass activity than Pt/C, which is comparable to Pd@Pt/C prepared by conventional microgram-scale method. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.