Hollow Polyhedral Arrays Composed of a Co3 O4 Nanocrystal Ensemble on a Honeycomb-like Carbon Hybrid for Boosting Highly Active and Stable Evolution Oxygen

Inorganic Chemistry
Xuan KuangQin Wei

Abstract

We synthesize hollow polyhedral arrays composed of honeycomb-like nanosheets of Co3O4 nanocrystals imbedded on carbon quantum dots (CQDs)- and nitrogen-codoped carbon matrix via a facile in situ air oxidation pyrolysis for CQDs-incorporated metal-organic framework polyhedral arrays. The function of CQDs hollowing and forming porous nanosheet shells was found. The resulting hierarchical architecture displays excellent oxygen evolution reaction activity with a low overpotential of 301 mV to drive 100 mA cm-2 in 1.0 M KOH and long-playing durability in oxygen evolution. The high performance can be ascribed to its highly dispersed Co3O4 nanocrystals, CQDs and nitrogen codoping, internal cavities, and hierarchical pore system.

References

Jan 3, 2014·Angewandte Chemie·Changzhou YuanXiong Wen David Lou
Mar 10, 2016·Nature Communications·Elise M MinerMircea Dincă
Dec 22, 2016·Chemical Communications : Chem Comm·Hengcong TaoZhenyu Sun
Dec 28, 2016·Advanced Materials·Yusuf Valentino KanetiYusuke Yamauchi
Mar 27, 2018·Chemical Society Reviews·Mercy R BenzigarAjayan Vinu

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