The critical importance of ionomers on the electrochemical activity of platinum and platinum-free catalysts for anion-exchange membrane fuel cells,Sustainable Energy & Fuels

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The critical importance of ionomers on the electrochemical activity of platinum and platinum-free catalysts for anion-exchange membrane fuel cells
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-05-18 , DOI: 10.1039/d0se00483a
Pietro G. Santori _{1,

2,

3,

4,

5} , Abhishek N. Mondal _{6,

7,

8,

9} , Dario R. Dekel _{6,

7,

8,

9,

10} , Frédéric Jaouen _{1,

2,

3,

4,

5}

Affiliation

Anion-exchange membrane fuel cells (AEMFCs) show remarkable and rapid progress in performance, significantly increasing the relevance for research on electrocatalysis of the oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR) for this technology. Since much of the recent progress in AEMFC performance can be tied to the improved interface between anion-exchange ionomers (AEIs) and catalysts, this topic deserves specific attention. This work reports the ORR and HOR activity measured in rotating disk electrodes for several ionomer–catalyst combinations, involving five different AEIs and Nafion® and four ORR and HOR catalysts selected from the best-in-class PGM-based and PGM-free catalytic materials. The results show little impact of the ionomers on the ORR and HOR activity of Pt/C and PtRu/C catalysts, respectively; however, the choice of the AEI has critical importance on the ORR activity of Fe–N–C and significant effect on the HOR activity of Pd–CeO₂/C.

中文翻译：

离聚物对用于阴离子交换膜燃料电池的铂和无铂催化剂的电化学活性至关重要

阴离子交换膜燃料电池（AEMFC）在性能上取得了显着且快速的进步，大大提高了对该技术进行氧还原反应（ORR）和氢氧化反应（HOR）的电催化研究的相关性。由于AEMFC性能的最新进展可以与阴离子交换离聚物（AEI）和催化剂之间的界面改善相关，因此该主题值得特别关注。这项工作报告了旋转圆盘电极中几种离聚物-催化剂组合的ORR和HOR活性，涉及五种不同的AEI和Nafion®以及从同类最佳的基于PGM和无PGM的催化材料中选择的四种ORR和HOR催化剂。结果表明，离聚物对Pt / C和PtRu / C催化剂的ORR和HOR活性影响很小。然而，₂ /℃。

更新日期：2020-06-30

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