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Carbon nanomaterials with different morphologies were prepared by thermal treatment of a flexible graphite sheet in KNO3 molten salt. Transmission electron microscopy was used to observe the morphologies. Porous graphene, carbon nanocages and carbon nanospheres were obtained on increasing the temperature from 350 to 600 °C. The formation mechanisms of different carbon morphologies are discussed.
An N-doped carbide-derived carbon shell was in situ derived from the surface of SiC nanoparticle by a one-pot method. Characterizations and electrochemistry experiments demonstrate that the prepared particles have a shell/core structure and exhibit a four-electron transfer pathway for oxygen reduction reaction as well as a superior stability compared with Pt/C catalysts.
An epitaxial TiC/nanodiamond (ND) was used as novel support for Pt electrocatalysts to improve its durability in fuel cells. The TiC/ND was fabricated by a simple one-pot synthesis method. TiC/ND-supported Pt electrocatalysts were synthesized using a microwave-assisted ethylene glycol method. Pt nanoparticles (NPs) with a mean size of 4.4nm were highly dispersed on the TiC/ND’s surface. The Pt/TiC/ND...
A flexible electrode was prepared by microwave heating deposition of manganese oxide (MnO 2 ) on carbon nanotubes (CNTs) followed by electrophoretic deposition of the MnO 2 -coated CNTs on a flexible graphite sheet (FGS). The prepared MnO 2 -coated CNTs were characterized by scanning and transmission electron microscopy, and X-ray diffraction. A uniformly thin nano-scale MnO...
A core/shell structure nanodiamond/graphene (ND/G) was prepared by annealing ND in a vacuum at the temperatures of 1200 and 1500°C. ND/G with a controllable few-layer graphene covering on the ND surface was achieved. The prepared ND/G was used as a support for a platinum (Pt) electrocatalyst in direct methanol fuel cells. A higher dispersion of Pt nanoparticles was observed on ND/G compared to pristine...
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