Pt Single Atoms Embedded in the Surface of Ni Nanocrystals as Highly Active Catalysts for Selective Hydrogenation of Nitro Compounds

• DOI: 10.1021/acs.nanolett.8b01059
• Publication Date: 2018-05-21T21:14:04Z
• Authors: Yuhan Peng; Zhigang Geng; Songtao Zhao; Liangbing Wang; Hongliang Li; Xu Wang; Xusheng Zheng; Junfa Zhu; Zhenyu Li; Rui Si; Jie Zeng
• Keywords: 02 engineering and technology; 0210 nano-technology

Single-atom catalysts exhibit high selectivity in hydrogenation due to their isolated active sites, which ensure uniform adsorption configurations of substrate molecules. Compared with the achievement catalytic selectivity, there is still a long way go exploiting activity single-atom catalysts. Herein, we developed highly and selective by embedding Pt single atoms surface Ni nanocrystals (denoted as Pt1/Ni nanocrystals). During 3-nitrostyrene, TOF numbers based on reached ∼1800 h–1 under 3 atm H2 at 40 °C, much higher than that supported carbon, TiO2, SiO2, ZSM-5. Mechanistic studies reveal remarkable derived from sufficient hydrogen supply because spontaneous dissociation both well facile diffusion H nanocrystals. Moreover, ensemble composed atom nearby leads configuration 3-nitrostyrene favorable for activation nitro groups, accounting 3-vinylaniline.