The oxygen reduction reaction (ORR) is critically important in energy converting systems, and the advancement of a catalyst that accelerates the process is vital. Here, an ORR electrocatalyst was developed by the stoichiometric addition of Co(II) ions to a model composite (FePH) and termed as γ-CoFePH. The developed electrocatalyst shows a significant enhancement in ORR activity with improved E_onset and E_1/2 (3 mA cm^–2) values, where E_1/2 is −0.29 V as compared to −0.60 V for FePH, drifting toward Pt/C and exhibits a limiting current density of −6.3 mA cm^–2 which exceeds the commercially available Pt/C. The γ-CoFePH also displays superior resistance toward methanol poisoning and stability of over 40 000 s retaining 83.6% of the current density under alkaline medium.

中文翻译：

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使用选择性金属离子促进模型复合材料中的电催化氧还原

氧还原反应（ORR）在能量转换系统中至关重要，而促进该过程的催化剂的进步至关重要。在这里，通过将Co（II）离子化学计量添加到模型复合材料（FePH）中来开发ORR电催化剂，并将其称为γ-CoFePH。已开发的电催化剂显示出ORR活性显着增强，具有改善的E_起始和E _1/2（3 mA cm ^–2）值，其中E _1/2为-0.29 V，而FePH为-0.60 V，向Pt / C，极限电流密度为−6.3 mA cm ^–2超过了市售的Pt / C。γ-CoFePH还显示出优异的抗甲醇中毒性，并且在碱性介质下具有超过40 000 s的稳定性，保持了电流密度的83.6％。