Total Structure of Bimetallic Core-Shell [Au42Cd40(SR)52]2- Nanocluster and Its Implications

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 [Au42Cd40(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 spectrometry (ESI-MS). A catalytic test for styrene oxidation and a comparison with relevant nanoclusters reveal the surface effect on the catalytic activity and selectivity.

Automated summary

This study successfully reported the complete structure of a [Au42Cd40(SR)52](2-) core-shell nanocluster, revealing its composition and the way it is protected, and demonstrated the surface effect on catalytic activity and selectivity through catalytic tests and comparative studies with relevant nanoclusters.