Porous carbon nanofibers doped with nickel (Ni) were successfully fabricated through electrospinning, carbonization, and CO2 activation techniques using polyacrylonitrile (PAN) petroleum pitch as sources acetate the dopant. During process, Ni was reduced dispersed in situ on matrix. The effects of doping content morphology structure systematically investigated SEM, TEM, XPS, XRD, Raman, BET ana...

Highly stable, cost-effective electrocatalysts facilitating oxygen reduction are crucial for the commercialization of membrane-based fuel cell and battery technologies. Herein, we demonstrate that protein-rich soya chunks with a high content of N, S and P atoms are an excellent precursor for heteroatom-doped highly graphitized carbon materials. The materials are nanoporous, with a surface area ...

Phase change and graphitization of diamonds from the Popigai impact crater (Krasnoyarsk Territory, Siberian platform, Russia) exposed to high-pressure high-temperature (HPHT) conditions 5.5 GPa 2000–2200 °C are studied by Raman spectroscopy X-ray diffractometry (XRD). Light-color type 1, free inclusions, with 0 10 % lonsdaleite, more resistant HPHT effects than dark 2 rich in lonsdaleite graphi...

A single-layer graphene has been uniformly grown on a Cu surface at elevated temperatures by thermal processing of a poly(methyl methacrylate) (PMMA) film in a rapid thermal annealing (RTA) system under vacuum. The detailed chemistry of the transition from solid-state carbon to graphene on the catalytic Cu surface was investigated by performing in situ residual gas analysis while PMMA/Cu-foil s...

This article reports on changes in electric double layer charge storage capacity as a function of surface chemistry and graphitic structure of porous carbon electrodes. By subjecting 20 nm to 2.0 μm sized carbide-derived carbons (CDCs) synthesized at 800 °C to high-temperature vacuum annealing at 700-1800 °C, we produce three-dimensional internal surface architectures with similar pore sizes an...

This paper investigated the wear mechanism of diamond during atomic force microscope (AFM) tip-based nanomachining Gallium Arsenide (GaAs) using molecular dynamics (MD) simulations. The elastic–plastic deformation at apex tip was observed Meanwhile, a transition from its initial cubic lattice structure sp3 hybridization to graphite sp2 revealed. Graphitization was, therefore, found be dominant ...

We present a novel and facile synthesis methodology for obtaining graphitic carbon structures from Fe(II) and Co(II) gluconates. The formation of graphitic carbon can be carried out in only one step by means of heat treatment of these organic salts at a temperature of 900 degrees C or 1000 degrees C under inert atmosphere. This process consists of the following steps: (a) pyrolysis of the organ...

Development of a transition metal based catalyst aiming at concomitant high activity and stability attributed to distinguished catalytic characteristics is considered as the bottleneck for dry reforming methane (DRM). This work highlights role modifying zirconia (ZrO2) alumina (Al2O3) supported nickel catalysts using lanthanum oxide (La2O3) varying from 0 20 wt% during methane. The mesoporous w...