A library of carbon-supported ultrasmall bimetallic nanoparticles
bimetallic nanoparticles, sulfur doped carbon, catalysis, ultrasmall, metal-support interaction
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.
Tsinghua University Press
Shi-Long Xu,Shan-Cheng Shen,Ze-Yue Wei,Shuai Zhao,Lu-Jie Zuo,Ming-Xi Chen,Lei Wang,Yan-Wei Ding,Ping Chen,Sheng-Qi Chu,Yue Lin,Kun Qian,Hai-Wei Liang, A library of carbon-supported ultrasmall bimetallic nanoparticles. NanoRes.2020, 13(10): 2735–2740