Graphene quantum dots induced porous orientation of holey graphene nanosheets for improved electrocatalytic activity
نویسندگان
چکیده
Complex electrolyte diffusion through the stacked graphene nanosheets limits their electrochemical performance. As a potential solution, this study explored of nitrogen-doped quantum dots (NGQDs) to induce 3D porous orientation holey oxide (hGO) nanosheets. The sizes NGQDs and antisolvent for phase separation assisted assembly were optimized achieve nanoporous network. This nano-network serves as soft template hGO, forming hierarchically carbon architecture. Benefiting from porosity framework, ?-? restacking was radically avoided, providing high transport rates. In addition, doped nitrogen J-type aggregation effectively tuned band structure realize charge transfer at low overpotential. enhanced electrocatalytic activity exceptionally resistance composite attributed electrode/electrolyte interface multidimensional & transport. Porous based counter electrode showed 78% photovoltaic performance (compared unmodified graphene) in dye-sensitized solar cell, which is comparable Pt electrode. proposed can be utilized emerging applications, such supercapacitors, water splitting, battery electrodes.
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ژورنال
عنوان ژورنال: Carbon
سال: 2021
ISSN: ['0008-6223', '1873-3891']
DOI: https://doi.org/10.1016/j.carbon.2020.09.031