Small-sized bimetallic nanoparticles that possess numerous accessible metal sites and optimal geometric/electronic structures show great promise for advanced synergetic catalysis but remain synthetic challenge so far. Here, an universial synthetic method is developed for building a library of bimetallic nanoparticles on mesoporous sulfur-doped carbon supports, consisting of 24 combinations of 3 noble metals (that is, Pt, Rh, Ir) and 7 other metals, with average particle sizes ranging from 0.7 to 1.4 nm. The synthetic strategy is based on the strong metal-support interaction arising from the metal-sulfur bonding, which suppresses the metal aggregation during the H₂-reduction at 700 °C and ensure the formation of small-sized and alloyed bimetallic nanoparticles. The enhanced catalytic properties of the ultrasmall bimetallic nanoparticles are demonstrated in the dehydrogenation of propane at high temperature and oxidative dehydrogenations of N-heterocycles.

具有许多可及的金属位点和最佳的几何/电子结构的小尺寸双金属纳米颗粒显示了先进的协同催化的巨大希望，但到目前为止仍然是合成难题。在此，开发了一种通用的合成方法，用于在介孔硫掺杂碳载体上构建双金属纳米颗粒库，该库由3种贵金属（即Pt，Rh，Ir）和7种其他金属的24种组合组成，平均粒径范围从0.7到1.4 nm。合成策略基于金属-硫键产生的强金属-载体相互作用，从而抑制了H ₂期间的金属聚集-在700°C下还原并确保形成小尺寸合金双金属纳米颗粒。在高温下丙烷脱氢和N-杂环的氧化脱氢中证明了超小双金属纳米颗粒的增强的催化性能。