Multimetallic Pt-based alloys with excavated structures have attracted great interest owing to their compositional and morphological tunability, high specific surface areas, and impressive electro-catalytic activities. Herein, we report the first facile one-pot synthesis of trimetallic Pt-Ni-Cu highly excavated rhombic dodecahedrons (ERDs) with a yield approaching 100%. More importantly, these highly uniform nanocrystals have three-dimensionally accessible excavated surfaces, where abundant stepped atoms are observed. Benefiting from the highly excavated rhombic dodecahedral structures, electronic and synergistic effects within the trimetallic alloy, and abundant stepped atoms, the as-prepared trimetallic Pt-Ni-Cu ERDs exhibit an enhanced electro-catalytic performance for the electro-oxidation of methanol compared to commercial Pt/C and bimetallic Pt-Cu ERDs and Pt-Ni-Cu solid rhombic dodecahedrons solid rhombic dodecahedrons (SRDs).

中文翻译：

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同时形成三金属Pt-Ni-Cu挖出的菱形十二面体，具有增强的甲醇氧化反应催化性能

具有开挖结构的多金属Pt基合金由于其组成和形态可调谐性，高比表面积和令人印象深刻的电催化活性而引起了人们的极大兴趣。在这里，我们报道了三金属Pt-Ni-Cu高开挖菱形十二面体（ERDs）的第一个简便的一锅法合成，收率接近100％。更重要的是，这些高度均匀的纳米晶体具有三维可接近的开挖表面，在该表面上观察到大量阶梯状原子。得益于高度挖掘的菱形十二面体结构，三金属合金内的电子和协同效应以及丰富的阶梯状原子，