Metallo-supramolecular polymer engineered porous carbon framework encapsulated stable ultra-small nanoparticles: a general approach to construct highly dispersed catalysts. Issue 34 (16th August 2018)

• Record Type: Journal Article
• Authors: Ai, Yongjian; He, Mengqi; Zhang, Feng; Long, Yang; Li, Yunzheng; Han, Qiang; Ding, Mingyu; Sun, Hong-bin; Liang, Qionglin
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 34(2018)
• Page Start: 16680
• Page End: 16689
• Publication Date: 2018-08-16
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta05369c
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : We developed an organometallic conjunction strategy for the scalable fabrication of porous carbon framework encapsulated sub-3 nm ultra-small nanoparticles. Abstract : The development of a general approach for fabricating stable ultra-small heterogeneous nanocatalysts has been intensively pursued. However, issues related to complex synthesis processes and structural stability have restricted their investigation and application. Here we report a facile organometallic conjunction strategy for the large-scale fabrication of porous carbon framework encapsulated highly dispersed sub-3 nm ultra-small nanoparticles (USMNPs@PCF). This methodology is based on the convenient aldol condensation reaction to manufacture a metallo-supramolecular polymer precursor and then consequent annealing to form the target nanocomposite. This technique was successfully applied to the preparation of varieties of USMNPs@PCF, including Fe, Co, Ni, Mo, Ru, Rh, Pd and Pt. As a representative application, the PCF encapsulated sub-3 nm Pd nanoparticles demonstrated remarkable durability and efficiency for chemoselective hydrogenation of nitroarenes to their corresponding anilines under ambient conditions with low catalyst loading. All hydrogenation reactions can complete in 4 min with >99% conversion and >99% chemoselectivity. The turnover frequency (TOF) was up to 11 400 h −1 for p -nitrophenol. This work provides a general, scalable and economical route for the manufacture of sub-3 nm and highly dispersed nanocomposites, which can be used in many other important fields, such as electrochemistry, energy science and environmental protection.