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- W3009371195 abstract "A new micro-nanostructured composite ([email protected]) of Ni-encapsulated and N-doped carbon nanotubes ([email protected]) pinned on N-doped ordered mesoporous carbon (NOMC) is constructed by a two-step synthesis strategy. The strategy involves the self-assembly preparation of water-soluble phenolic resin/F127 colloid by a hydrothermal route and the subsequent catalytic pyrolysis of as-prepared phenolic resin/F127 copolymer and melamine with nickel acetate as Ni source and self-generated catalyst, leading to the in situ growth of dispersive [email protected] pinned on NOMC through the Ni junction. In the resultant [email protected], the NOMC shows reduced particle size and shortened mesopore channel length of 15–30 μm compared to 850 μm-2 mm of pristine NOMC. The pinned [email protected] constructs a 3D conductive scaffold in the composite and the conductivity is correspondingly raised from 20.4 S cm−1 of pristine NOMC to 254.1 S cm−1 of [email protected] The particle size, mesoporosity and surface area of [email protected] composite are also flexibly regulated by tailoring the relative content of [email protected] and NOMC. The new-structured [email protected] composites are developed as counter electrode (CE) materials for DSSCs, which demonstrates an excellent catalytic activity towards I3- reduction. The optimum [email protected] CE delivers a low charge-transfer resistance of 2.21 Ω and the assembled DSSC achieves a high power conversion efficiency of 8.39%. Moreover, the [email protected] CE based DSSC also manifests a preeminent electrochemical stability in corrosiveI-/I3- electrolyte with a remnant efficiency of 7.82% after 72 h of illumination. The outstanding electrocatalytic performance is mainly correlated with their unique architecture, in which the pinned [email protected] conductive substrate accelerates the electron transportation among NOMC micron-particles, and the amorphous NOMC with short-range mesopores accelerates the electrolyte diffusion and supplies abundant ions-accessible defects for I3- reduction." @default.
- W3009371195 created "2020-03-13" @default.
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- W3009371195 date "2020-06-01" @default.
- W3009371195 modified "2023-10-13" @default.
- W3009371195 title "In situ growth of Ni-encapsulated and N-doped carbon nanotubes on N-doped ordered mesoporous carbon for high-efficiency triiodide reduction in dye-sensitized solar cells" @default.
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- W3009371195 doi "https://doi.org/10.1016/j.cej.2020.124633" @default.
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