Herein, a simple synthesis method was used to prepare an active oxygen reduction reaction (ORR) electrocatalyst based on iron and nitrogen co‐doped graphene for polymer electrolyte fuel cell applications. For the synthesis of the ORR catalysts, two different graphene‐based materials, commercially available graphene (Gra) and graphene oxide (GO), were used as carbon source. The half‐cell experiments conducted by rotating disc electrode (RDE) method revealed that Fe‐N‐Gra showed much higher ORR electrocatalytic activity than Fe‐N‐GO in alkaline medium. This is attributed to the higher surface area, micro/mesoporous nature and larger amount of Fe‐N x /amines moieties present in Fe‐N‐Gra compared to Fe‐N‐GO, as shown by different physico‐chemical methods. Almost half of the iron was confirmed to be in highly active Fe‐N x form by 57 Fe Mössbauer spectroscopy. Thus, the Fe‐N‐Gra as ORR catalyst was further selected to apply this for both, proton exchange membrane (PEM) and anion exchange membrane (AEM) fuel cell tests.

中文翻译：

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铁和氮掺杂的石墨烯基催化剂在燃料电池中的应用

本文中，一种简单的合成方法用于制备基于铁和氮共掺杂石墨烯的活性氧还原反应（ORR）电催化剂，用于聚合物电解质燃料电池应用。为了合成ORR催化剂，使用了两种不同的基于石墨烯的材料，即市售的石墨烯（Gra）和氧化石墨烯（GO）作为碳源。通过旋转圆盘电极（RDE）方法进行的半电池实验表明，Fe-N-Gra在碱性介质中显示出比Fe-N-GO更高的ORR电催化活性。与不同的物理化学方法相比，这归因于与Fe-N-GO相比，Fe-N-Gra中具有较高的表面积，微/中层性质以及大量的Fe-N x /胺部分。57 FeMössbauer光谱法确认了几乎一半的铁为高活性Fe‐N x形式。因此，Fe-N-Gra作为ORR催化剂被进一步选择用于质子交换膜（PEM）和阴离子交换膜（AEM）燃料电池测试。