Abstract Designing highly active and durable oxygen reduction reaction (ORR) electrocatalysts is essential for developing efficient proton-exchange membrane fuel cells (PEMFCs). In this work, ordered PtCuNi/C nanoparticles (NPs) were synthesized using an impregnation reduction method. This study shows that the incorporation of Ni in ordered PtCu/C can effectively adjust the electronic structure of Pt, thereby optimizing oxygen binding energy for the ORR. The obtained intermetallic ordered PtCuNi/C NPs significantly improved ORR activity and durability compared to ordered PtCu/C. Specifically, PtCu0·5Ni0·5/C-700 shows a mass activity of 1.29 A mg Pt−1 at 0.9 V vs. reversible hydrogen electrode (RHE), which is about 9.2 times higher than that of commercial Pt/C. PtCu0.5Ni0.5/C-700 is also shown to be competent cathode catalyst for a single-cell system exhibiting high power density (461 mW cm−2). This work demonstrates that ordered PtCu0·5Ni0·5/C-700 can be used as a highly active and durable ORR catalyst in PEMFCs.

中文翻译：

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镍引入结构有序的 PtCuNi/C 作为氧还原反应的高性能电催化剂

摘要 设计高活性和耐用的氧还原反应 (ORR) 电催化剂对于开发高效的质子交换膜燃料电池 (PEMFC) 至关重要。在这项工作中，使用浸渍还原法合成了有序的 PtCuNi/C 纳米粒子 (NPs)。该研究表明，在有序 PtCu/C 中掺入 Ni 可以有效调整 Pt 的电子结构，从而优化 ORR 的氧结合能。与有序 PtCu/C 相比，获得的金属间有序 PtCuNi/C NPs 显着提高了 ORR 活性和耐久性。具体而言，PtCu0·5Ni0·5/C-700 在 0.9 V 下对可逆氢电极 (RHE) 显示出 1.29 A mg Pt-1 的质量活度，是商业 Pt/C 的约 9.2 倍。PtCu0.5Ni0. 5/C-700 也被证明是具有高功率密度 (461 mW cm-2) 的单电池系统的合格阴极催化剂。这项工作表明，有序 PtCu0·5Ni0·5/C-700 可用作 PEMFC 中高活性和耐用的 ORR 催化剂。