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- W3153160836 abstract "Rational design of hierarchically structured carbon nanomaterials and also the facile regulation of their metal species decoration for enhanced oxygen reduction reaction (ORR) are urgently required. Herein, N-doped carbon nanospheres (N-MCN) with plentiful pyridinic and graphitized N-induced active sites were closely bridged with carbon nanotubes to remedy the conductivity loss of N-doping. The as-obtained [email protected] exhibited hierarchically porous structure with large surfaces area and good conductivity with small charge transfer resistance, which therefore had a superior ORR activity to the other carbon-base catalysts. Importantly, the metal species (M = Fe or Co) can be loaded in this porous [email protected] via a simple co-pyrolysis, where their numbers and shapes can be easily regulated. It was found the optimal adsorption of metal ions into the precursors produced both single atom and few carbon-coated nanoparticles in M/[email protected], which thus synergistically contributed the enhanced ORR performances, including large current density, low onset and half-wave potentials, as well as superior stability and methanol tolerance than those of commercial 20 wt% Pt/C. Moreover, M/[email protected] also demonstrated comparable oxygen evolution reaction activity to RuO2 possibly due to the regulated metal species. This work provided a strategy to regulate the nanostructure and intrinsic active sites of carbon-based electrocatalysts." @default.
- W3153160836 created "2021-04-26" @default.
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- W3153160836 date "2021-10-01" @default.
- W3153160836 modified "2023-10-17" @default.
- W3153160836 title "Carbon nanotube-bridged N-doped mesoporous carbon nanosphere with atomic and nanoscaled M (M = Fe, Co) species for synergistically enhanced oxygen reduction reaction" @default.
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- W3153160836 doi "https://doi.org/10.1016/j.cej.2021.129689" @default.
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