Total Structure of Bimetallic Core–Shell [Au 42 Cd 40 (SR) 52 ] 2? Nanocluster and Its Implications

Key Words:bimetallic nanoclusters · cadmium · core–shell · gold · thiolate

Abstract:Bimetallic core–shell nanostructures hold great promise in elucidating the bimetallic synergism. However, it remains a challenge to construct atomically precise core–shell with high-valence active metals on the gold surface. In this work, we report the total structure of a [Au 42 Cd 40 (SR) 52 ] 2? core–shell nanocluster and multiple implications. Single crystal X-ray diffraction (SCXRD) reveals that the structure possesses a two-shelled Au 6 @Au 36 core and a closed cadmium shell of Cd 40 , and the core–shell structure is then protected by 52 thiolate (-SR) ligands. The composition of the nanocluster is further confirmed by electrospray ionization mass spectrom- etry (ESI-MS). A catalytic test for styrene oxidation and a comparison with relevant nanoclusters reveal the surface effect on the catalytic activity and selectivity.

Volume:60

Issue:33

Translation or Not:no