Pt-based nanostructures with low Pt content are attractive electrocatalysts for high-efficiency hydrogen evolution reaction. It's a challenge to simultaneously tailor the structure and size of Pt-based alloys in a simple manner and boost their electrocatalytic efficiency. Here, we report the synthesis of high performance Fe₄₅Pt₃₅Cu₂₀ nanoparticles (NPs) with a well-controlled size and crystal structure by a simple organometallic method. Size control of the particles was realized in the range of 8 nm to 27 nm by simply varying the type of Fe precursor, and with the increase of particle size the Fe₄₅Pt₃₅Cu₂₀ alloys exhibited a higher degree of chemical ordering (fct phase, namely L1₀ structure). The FePtCu nanoparticles showed superior catalytic activity and stability towards the hydrogen evolution reaction with a notably low Tafel slope of 24 mV dec⁻¹ (0.5 M H₂SO₄) in comparison to commercial Pt/C catalysts. The work provides a simple strategy for tailoring the size and crystal phase of Pt based nanostructures to facilitate their promising application in catalytic reactions.

中文翻译：

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高性能制氢反应用FePtCu纳米催化剂的结构和尺寸控制

具有低Pt含量的Pt基纳米结构是高效氢析出反应的有吸引力的电催化剂。以简单的方式同时调整Pt基合金的结构和尺寸并提高其电催化效率是一个挑战。在这里，我们报告了通过简单的有机金属方法合成的具有良好控制的尺寸和晶体结构的高性能Fe ₄₅ Pt ₃₅ Cu ₂₀纳米颗粒（NPs）。只需改变Fe前驱体的类型，即可将颗粒的尺寸控制在8 nm至27 nm的范围内，并且随着颗粒尺寸的增加，Fe ₄₅ Pt ₃₅ Cu ₂₀合金表现出更高的化学有序度（fct相）。 ，即L1₀结构）。与商业化的Pt / C催化剂相比，FePtCu纳米颗粒表现出优异的催化活性和对氢释放反应的稳定性，Tafel斜率非常低，仅为24 mV dec ^-1（0.5 MH ₂ SO ₄）。这项工作为定制Pt基纳米结构的尺寸和晶相提供了一种简单的策略，以促进其在催化反应中的应用前景。