fine-tuning the wall thickness of ordered mesoporous graphene by exploiting ligand exchange of colloidal nanocrystals

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2017
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Abstract
Because of their unique physical properties, three-dimensional (3D) graphene has attracted enormous attention over the past years. However, it is still a challenge to precisely control the layer thickness of 3D graphene. Here, we report a novel strategy to rationally adjust the wall thickness of ordered mesoporous graphene (OMG). By taking advantage of ligand exchange capability of colloidal Fe3O4 nanocrystals, we are able to fine-tune the wall thickness of OMG from 2 to 6 layers of graphene. When evaluated as electrocatalyst for oxygen reduction reaction upon S and N doping, the 4-layer OMG is found to show better catalytic performance compared with their 2- and 6-layer counterparts, which we attribute to the enhanced exposure of active sites arising from the thin wall thickness and high surface area.
Reference Key
han2017frontiersfine-tuning Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Dandan Han;Yancui Yan;Jishi Wei;Biwei Wang;Tongtao Li;Guannan Guo;Dong Yang;Songhai Xie;Angang Dong
Journal spatium
Year 2017
DOI
10.3389/fchem.2017.00117
URL
http://journal.frontiersin.org/article/10.3389/fchem.2017.00117/full
Keywords
self-assembly ligand exchange

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