Graphene oxide induced assembly and crumpling of Co3O4 nanoplates
- 24 July 2020
- journal article
- research article
- Published by IOP Publishing in Nanotechnology
- Vol. 31 (30), 305601
- https://doi.org/10.1088/1361-6528/ab841f
Abstract
Cobalt (II, III) oxide (Co3O4) has been widely studied and applied in various fields, however, it suffers from slow mass and electron transfer during applications. Herein, crumpled Co3O4 and Co3O4/reduced graphene oxide (rGO) with tunable 2D-in-3D structures were prepared by combining spray pyrolysis with a graphene oxide (GO) template. The 2D Co3O4 nanoplates were interconnected with each other to form a 3D ball with many wrinkles, resulting in defect enrichment on the abundant boundaries of the nanosheets, which provided more active sites for catalytic reactions. In addition, the unique 2D-in-3D structure allowed fast mass transfer and structural stability. Furthermore, the assembled structure could be understood as being composed of uniformly distributed oxygen-containing functional groups pinning metal cations on the GO surface through electrostatic interaction, and the 2D structure of the GO enabled the in situ converted Co3O4 to grow along the GO surface with excellent dispersion. Taking advantage of the above, the Co3O4/rGO balls demonstrated an excellent oxygen evolution reaction performance, an overpotential of 298 mV at a current density of 10.0 mA cm(-2) and a current density of 115.9 mA cm(-2) at the overpotential of eta = 500 mV.Funding Information
- Basic Research Program of Shanghai (19JC1410402)
- Shanghai talents
- Shanghai Education Commission (2019-01-07-00-07-E00015)
This publication has 52 references indexed in Scilit:
- Two-Dimensional Porous Micro/Nano Metal Oxides Templated by Graphene OxideACS Applied Materials & Interfaces, 2015
- Monolithic Metal Oxide TransistorsACS Nano, 2015
- Pure and Palladium‐Loaded Co3O4 Hollow Hierarchical Nanostructures with Giant and Ultraselective Chemiresistivity to Xylene and TolueneChemistry – A European Journal, 2015
- Template-Free Synthesis of Hollow-Structured Co3O4 Nanoparticles as High-Performance Anodes for Lithium-Ion BatteriesACS Nano, 2015
- Graphene with three-dimensional architecture for high performance supercapacitorCarbon, 2014
- Electrodeposition of Crystalline Co3O4—A Catalyst for the Oxygen Evolution ReactionChemistry of Materials, 2012
- Compression and Aggregation-Resistant Particles of Crumpled Soft SheetsACS Nano, 2011
- Magnetite/graphene nanosheet composites: interfacial interaction and its impact on the durable high-rate performance in lithium-ion batteriesRSC Advances, 2011
- Kinetic Study of the Graphite Oxide Reduction: Combined Structural and Gravimetric Experiments under Isothermal and Nonisothermal ConditionsThe Journal of Physical Chemistry C, 2010
- Graphite Oxides Obtained from Porous Graphite: The Role of Surface Chemistry and Texture in Ammonia Retention at Ambient ConditionsAdvanced Functional Materials, 2010