耐久性
电解质
涂层
催化作用
化学工程
材料科学
膜
聚合物
壳体(结构)
碳纤维
燃料电池
复合材料
化学
电极
有机化学
物理化学
工程类
复合数
生物化学
作者
Wonchan Hwang,Hyunjoon Lee,Chi‐Yeong Ahn,Yong‐Hun Cho,Yung‐Eun Sung
标识
DOI:10.1016/j.jiec.2023.12.014
摘要
Construction of a physical protective layer on the catalyst surface of platinum-based catalysts in fuel cells to increase their durability has attracted attention of researchers. In particular, the carbon shell is suitable as a coating material because it covers relatively few active sites of Pt compared to other coating materials. However, the conventional carbon shell formation method is complex, time-consuming, and does not form a uniform layer easily. In this study, a new method for attaching a poly(diallyldimethylammonium chloride)(PDDA) polymer to the catalyst surface and forming a carbon shell through heat treatment was proposed. This method can easily forms a thin and uniform carbon shell with a thickness of ≤1 nm, minimizes performance reduction, and maintains superior durability of catalyst. For the 120-h single cell durability test, the current density at 0.6 V and maximum power density of Pt/C without carbon shell decreased by 32.3 % and 26.5 %, respectively, compared to the initial performance, whereas it was confirmed that 5.9 % and 9.0 % were reduced, respectively, in the case of carbon-shelled Pt/C manufactured in this study. This new method of carbon shell formation is expected to be easily applicable to various nanoparticle-based catalysts that require a physical protective layer to ensure durability.
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