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- W3084753600 abstract "Complex electrolyte diffusion through the stacked graphene nanosheets limits their electrochemical performance. As a potential solution, this study explored the potential of nitrogen-doped graphene quantum dots (NGQDs) to induce 3D porous orientation of holey graphene oxide (hGO) nanosheets. The sizes of NGQDs and antisolvent for phase separation assisted assembly were optimized to achieve a 3D nanoporous network. This nano-network serves as a soft template for the porous orientation of hGO, forming a 3D hierarchically porous carbon architecture. Benefiting from the porosity of the 3D framework, π-π restacking was radically avoided, providing high electrolyte transport rates. In addition, doped nitrogen and J-type aggregation of NGQDs effectively tuned the band structure to realize charge transfer at low overpotential. The enhanced electrocatalytic activity and exceptionally low charge transfer resistance of the composite structure were attributed to the enhanced electrode/electrolyte interface and multidimensional charge & electrolyte transport. Porous composite structure based counter electrode showed 78% enhanced photovoltaic performance (compared to unmodified graphene) in the dye-sensitized solar cell, which is comparable to the performance of Pt electrode. The proposed 3D porous orientation can be utilized in emerging electrocatalytic applications, such as supercapacitors, water splitting, and battery electrodes." @default.
- W3084753600 created "2020-09-21" @default.
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- W3084753600 date "2021-01-01" @default.
- W3084753600 modified "2023-10-18" @default.
- W3084753600 title "Graphene quantum dots induced porous orientation of holey graphene nanosheets for improved electrocatalytic activity" @default.
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- W3084753600 doi "https://doi.org/10.1016/j.carbon.2020.09.031" @default.
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