双金属核壳[Au Cd (SR) ]纳米团簇的整体结构及其意义
Total Structure of Bimetallic Core-Shell [Au Cd (SR) ] Nanocluster and Its Implications.
作者信息
Tang Li, Ma Along, Zhang Cheng, Liu Xuguang, Jin Rongchao, Wang Shuxin
机构信息
College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui, 230601, P. R. China.
出版信息
Angew Chem Int Ed Engl. 2021 Aug 9;60(33):17969-17973. doi: 10.1002/anie.202106804. Epub 2021 Jul 16.
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 Cd (SR) ] core-shell nanocluster and multiple implications. Single crystal X-ray diffraction (SCXRD) reveals that the structure possesses a two-shelled Au @Au core and a closed cadmium shell of Cd , 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.
双金属核壳纳米结构在阐明双金属协同作用方面具有巨大潜力。然而，在金表面构建具有高价活性金属的原子精确核壳结构仍然是一项挑战。在这项工作中，我们报告了[Au Cd (SR) ]核壳纳米团簇的完整结构及其多重意义。单晶X射线衍射（SCXRD）表明，该结构具有双壳层的Au@Au核以及由Cd构成的封闭镉壳层，并且核壳结构由52个硫醇盐（-SR）配体保护。通过电喷雾电离质谱（ESI-MS）进一步证实了纳米团簇的组成。对苯乙烯氧化的催化测试以及与相关纳米团簇的比较揭示了表面对催化活性和选择性的影响。
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