Abstract Pt-based ordered alloy catalysts have been extensively investigated to improve the catalytic performance for proton exchange membrane fuel cells. Herein, we report N-doped ordered Pt3Co nanoparticles supported on XC-72R carbon (O-Pt3CoN/C) for oxygen reduction reaction (ORR). Both the X-ray photoelectron spectroscopy and the energy-dispersive X-ray spectroscopy elemental mapping analyses confirm the successful N-doping within the Pt3Co intermetallic compound. Consequently, the N-doped catalyst exhibits a significantly higher ORR performance in comparison with Pt3Co and commercial Pt/C catalysts. Importantly, the ORR mass activity of N-doped Pt3Co intermetallic compound is almost 2.4 times of that obtained on commercial Pt/C. Moreover, after accelerated durability test over the potential range of 0.6 to 1.1 V (vs. RHE), ORR activity decay of N-doped Pt3Co/C is only 21.5%, lower than those of ordered Pt3Co and commercial Pt/C catalysts. Thus, N-doping could be utilized as an effective strategy for further improving the ORR performance of Pt-M/C catalysts.

中文翻译：

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氮掺杂的 Pt3Co 金属间化合物纳米粒子：一种耐用的氧还原电催化剂

摘要 Pt 基有序合金催化剂已被广泛研究以提高质子交换膜燃料电池的催化性能。在此，我们报告了负载在 XC-72R 碳（O-Pt3CoN/C）上用于氧还原反应（ORR）的 N 掺杂有序 Pt3Co 纳米颗粒。X 射线光电子能谱和能量色散 X 射线光谱元素映射分析证实了 Pt3Co 金属间化合物中的成功 N 掺杂。因此，与 Pt3Co 和商业 Pt/C 催化剂相比，N 掺杂催化剂表现出明显更高的 ORR 性能。重要的是，N 掺杂 Pt3Co 金属间化合物的 ORR 质量活性几乎是商业 Pt/C 上获得的 ORR 质量活性的 2.4 倍。此外，在 0.6 至 1.1 V（相对于 RHE）的电位范围内进行加速耐久性测试后，N掺杂的Pt3Co/C的ORR活性衰减仅为21.5%，低于有序Pt3Co和商业Pt/C催化剂的ORR活性衰减。因此，N掺杂可作为进一步提高 Pt-M/C 催化剂 ORR 性能的有效策略。