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- W4281661579 abstract "The fabrication of highly dense atomically dispersed platinum (Pt) on a carbon matrix increases the catalytic sites and is one of the ways to utilize Pt to make inexpensive and highly efficient electrocatalysts. We have employed a three-dimensional hierarchical porous carbon (3D-HPC) substrate and nanocrystal co-existed highly dense Pt single atoms deposited by the incipient wetness impregnation method. The special structure of the 3D-HPC substrate favors the homogeneous dispersion of Pt all over the 3D-HPC, leading to nanocrystal co-existed highly dense atomically disperse [email protected] The as-prepared [email protected] shows outstanding catalytic properties towards tri-iodide and oxygen reduction reactions (ORR). The [email protected] electrode shows lower charge transfer resistance (Rct) at the electrode/electrolyte interface with narrow peak-to-peak separation (△Epp) and higher peak current density during the tri-iodide reduction reaction (IRR). The DSSC fabricated with a [email protected] electrode shows improved performance compared to the reference Pt counter electrode (CE). Furthermore, CV and LSV demonstrate the better catalytic activity of [email protected] towards ORR, with higher onset potential (Eonset), half-wave potential (E1/2), and current density (j) compared to the reference 20% Pt/C electrode. Furthermore, impressive mass activity was observed by the [email protected] catalyst compared to 20% Pt/C and other recently reported single atom-based catalysts. The [email protected] catalyst also shows improved stability towards IRR and ORR. This simple strategy to fabricate nanocrystal co-existed highly disperse [email protected] catalysts with outstanding electrocatalytic performance and stability paves the way for its practical application and provides insights into a new approach to the design of electrocatalysts applicable to energy-related devices." @default.
- W4281661579 created "2022-06-13" @default.
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- W4281661579 date "2022-10-01" @default.
- W4281661579 modified "2023-10-15" @default.
- W4281661579 title "Nanocrystal co-existed highly dense atomically disperse Pt@3D-hierarchical porous carbon electrocatalysts for tri-iodide and oxygen reduction reactions" @default.
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- W4281661579 doi "https://doi.org/10.1016/j.cej.2022.137249" @default.
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