Ultrathin 2D metal nanostructures have sparked a lot of research interest because of their improved electrocatalytic properties for fuel cells. So far, no effective technique for preparing ultrathin 2D Pd-based metal nanostructures with more than three compositions has been published. Herein, a new visible-light-induced template technique for producing PdAuBiTe alloyed 2D ultrathin nanosheets is developed. The mass activity of the PdAuBiTe nanosheets against the oxygen reduction reaction (ORR) is 2.48 A mg_Pd⁻¹, which is 27.5/17.7 times that of industrial Pd/C/Pt/C, respectively. After 10 000 potential cyclings, there is no decrease in ORR activity. The PdAuBiTe nanosheets exhibit high methanol tolerance and in situ anti-CO poisoning properties. The PdAuBiTe nanosheets, as cathode electrocatalysts in direct methanol fuel cells, can thus give significant improvement in terms of power density and durability. In O₂/air, the power density can be increased to 235.7/173.5 mW cm⁻², higher than that reported in previous work, and which is 2.32/3.59 times higher than Pt/C.

中文翻译：

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超薄 PdAuBiTe 纳米片作为直接甲醇燃料电池装置的高性能氧还原催化剂

超薄二维金属纳米结构因其改进的燃料电池电催化性能而引起了很多研究兴趣。到目前为止，还没有公开制备具有超过三种成分的超薄 2D Pd 基金属纳米结构的有效技术。在此，开发了一种新的可见光诱导模板技术，用于生产 PdAuBiTe 合金化二维超薄纳米片。PdAuBiTe 纳米片对氧还原反应 (ORR) 的质量活性为 2.48 A mg _Pd ^-1，分别是工业 Pd/C/Pt/C 的 27.5/17.7 倍。10 000 次潜在循环后，ORR 活性没有降低。PdAuBiTe 纳米片表现出高甲醇耐受性和原位抗 CO 中毒特性。PdAuBiTe 纳米片作为直接甲醇燃料电池中的阴极电催化剂，因此可以显着提高功率密度和耐久性。在O ₂ /空气中，功率密度可提高至235.7/173.5 mW cm ^-2，高于先前工作中报道的功率密度，是Pt/C的2.32/3.59倍。