New materials for catalysis and energy storage devices

Abstract

surfactant molecule possessing a cleavable carbamate bond; B. Micelle formed from A; C. Resulting nanocage with tethered interior amino groups after cleavage of carbamate bond and release of cleaved fragments. (D-E): D. Fourth generation dendrimer using cleavable carbamate bond for generation growth; inset shows the repeating units on the left and the periphery unit on the right; E. Nanoparticle formed by cross-linking the periphery C5C bond in D by hydrosilylation; F. Nanocage with interior alcohol groups after cleaving the carbamate bonds in E. (G-I): G. Core containing silyl ester bonds only at the periphery; H. Nanoparticle formed by cross-linking the periphery C5C bonds in G; inset shows the silane cross-linking agent; I. A segment of the core-shell nanocage after cleaving the silyl ester bonds in H; core remained, resulting in carboxylic acid-silanol pairs in the cavity. a Reaction conditions: Catalyst weight 5 350 mg except 5.5 mg Au/TiO 2 , C 3 H 8 :O 2 :H 2 :He 5 5:5:5:85, total flow rate 5 30 mL min 21 , data shown were collected after 4.5 h time-on-stream at 2208C. Ti (wt %) were determined by ICP-AES. b (MO x )/[Au/SiO 2 ] denotes MO x patches decorating a Au/SiO 2 catalyst. Au loading 0.5 wt %, Ti loadings for the three samples were 0, 0.7, and 1.5 wt %. c Average Au particle diameter after catalytic testing estimated from STEM images. d Small amounts (4-6%) each of isopropanol and acetaldehyde also detected, but no propene. e From Ref. 26. f 11% acetaldehyde also detected.

Molecular simulations on the hydration and underwater oleophobicity of zwitterionic self‐assembled monolayers

“…It is found that zwitterionic materials show highly fouling resistance due to its strong hydration capability via electrostatic interactions 2‐4 . They have been widely used in anticoagulant, 5 drug delivery systems, 6 antifogging, 7 antifouling, 8 fuel cells, 9 oil–water separation 10 and underwater self‐cleaning, 11 and so forth.…”

Nanospace‐confined synthesis of coconut‐like SnS/C nanospheres for high‐rate and stable lithium‐ion batteries

“…With the rapid development of portable electronic devices and electric vehicles, it is imperative to exploit higher energy/power densities and longer cycle life energy storage devices, for example, lithium‐ion batteries (LIBs) . However, as a momentous component, their anode materials have been greatly restricted by the low theoretical capacity (372 mAh g −1 ) of the conventional graphite anode . Tin (Sn)‐based materials including Sn, SnO 2 , SnS, and SnS 2 show the incredible potential as its alternative because they can store plentiful Li + by conversion reaction and alloying reaction .…”