Developing a feasible method to massively fabricate low-cost and efficient oxygen reduction reaction (ORR) catalysts is highly anticipated to the commercialization of fuel cells. In this work, N atoms were doped into inert sp² configuration to alter the spin and charge distribution in the carbon matrix. The Pt/H₂–N–C catalyst was successfully prepared by embedding ultralow Pt nanoparticles on N-based carbon. Results indicated that the protonated N-groups at edge sites efficiently regulated the absorption of the PtCl₆^2– anion and widely limited the migration of Pt species at 1000 °C. The acquired Pt/H₂–N–C electrocatalyst exhibited high ORR performance in the acidic electrolyte. The high-temperature proton exchange membrane fuel cell (HT-PEMFC) measurement illustrated that the open-circuit voltage and power density of the Pt/H₂–N–C catalyst were higher than those of the commercial 20% Pt/C at 150 °C. This work provided a facile strategy to obtain efficient and low-cost Pt catalysts for ORR and HT-PEMFCs.

中文翻译：

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超低 Pt 掺杂在 N 基碳上作为高温质子交换膜燃料电池的有前途的电催化剂

开发一种可行的方法来大规模制造低成本和高效的氧还原反应（ORR）催化剂，对燃料电池的商业化寄予厚望。在这项工作中，N 原子被掺杂到惰性 sp ²配置中，以改变碳基质中的自旋和电荷分布。Pt/H ₂ -N-C 催化剂是通过将超低 Pt 纳米粒子嵌入 N 基碳上而成功制备的。结果表明，边缘位置的质子化 N 基团有效地调节了 PtCl ₆ ^2-阴离子的吸收，并广泛限制了 Pt 物种在 1000 °C 时的迁移。获得的Pt/H ₂-N-C 电催化剂在酸性电解质中表现出高 ORR 性能。高温质子交换膜燃料电池 (HT-PEMFC) 测量表明，Pt/H ₂ –N–C 催化剂的开路电压和功率密度高于商业 20% Pt/C 在 150 ℃。这项工作为获得用于 ORR 和 HT-PEMFC 的高效且低成本的 Pt 催化剂提供了一种简便的策略。