Silica‐Enveloped 2D‐Sheet‐to‐Nanocrystals Conversion for Resilient Catalytic Dry Reforming of Methane. Issue 34 (15th July 2021)

• Record Type: Journal Article
• Authors: Jang, Sun Woo; Dutta, Soumen; Kumar, Amit; Kim, Soo Min; You, Young‐Woo; Lee, In Su
• Is Part Of: Small. Volume 17:Issue 34(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-07-15
• Subjects: 2D nanostructures -- dry reforming of methane -- nanocatalysts -- nanocrystal conversion chemistry -- nanospace confinement; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202102851
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Here, lamellar confinement strategy is introduced for "sheet‐to‐nanocrystals (NCs)" conversion within a 2D‐SiO2 envelope, which constructs a catalytic nanocartridge holding a platoon of isolated and in‐plane‐aligned ultrasmall Ni‐NCs, performing as a robust and coking‐resistant catalytic system for dry reforming of methane. Overcoming the problem of unavoidable bulk crystal growth from multiple sheets‐stack or sheet‐on‐open‐support, silica bilayer‐encasing tightly clamps the atomic‐thin Ni(OH)2 ‐nanosheet during thermal conversion and further hinders the migratory fusion of the resultant Ni‐NCs. Upon heating‐cooling cycle, the flapping silica envelope clutches the Ni‐NCs like "eggs in a carton, " subsequently, ensuring their thermal stability. Owing to the unique 2D‐enveloped rigid architecture, Ni‐NCs can circumvent sintering and coke deposition while tolerating the high temperatures (>700 °C) for long operation (>100 h), affording high conversions to syngas. Abstract : Lamellar confined conversion strategy with a Ni(OH)2 nanosheet within a 2D‐SiO2 envelope constructs a catalytic nanocartridge holding a platoon of isolated and in‐plane‐aligned ultrasmall Ni‐nanocrystals (NCs), performing as robust and coking‐resistant dry reforming of methane (DRM) catalysis.