Small-sized bimetallic nanoparticles that integrate the advantages of efficient exposure of the active metal surface and optimal geometric/electronic effects are of immense interest in the field of catalysis, yet there are few universal strategies for synthesizing such unique structures. Here, we report a novel method to synthesize sub-2 nm bimetallic nanoparticles (Pt–Co, Rh–Co, and Ir–Co) on mesoporous sulfur-doped carbon (S–C) supports. The approach is based on the strong chemical interaction between metals and sulfur atoms that are doped in the carbon matrix, which suppresses the metal aggregation at high temperature and thus ensures the formation of small-sized and well alloyed bimetallic nanoparticles. We also demonstrate the enhanced catalytic performance of the small-sized bimetallic Pt–Co nanoparticle catalysts for the selective hydrogenation of nitroarenes.

中文翻译：

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强大的金属-硫相互作用合成碳载亚2纳米双金属催化剂

集成了有效金属表面的有效暴露和最佳几何/电子效应的优点的小尺寸双金属纳米颗粒在催化领域引起了极大的兴趣，但合成这种独特结构的通用策略很少。在这里，我们报告了一种在介孔硫掺杂碳（SC）载体上合成亚2 nm双金属纳米颗粒（Pt-Co，Rh-Co和Ir-Co）的新颖方法。该方法基于金属与掺杂在碳基质中的硫原子之间的强化学相互作用，从而抑制了高温下的金属聚集，从而确保了小尺寸合金化的双金属纳米颗粒的形成。