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Search for "graphitized carbon" in Full Text gives 8 result(s) in Beilstein Journal of Nanotechnology.
A novel approach to pulsed laser deposition of platinum catalyst on carbon particles for use in polymer electrolyte membrane fuel cells
Beilstein J. Nanotechnol. 2023, 14, 190–204, doi:10.3762/bjnano.14.19
- from the platinum target to eliminate the chemical functionalization of the carbon substrate and the chemical synthesis of PtNPs. The Pt catalyst was deposited on synthesized highly graphitized carbon particles and XC-72R commercial carbon support using PLD with a specially designed electromechanical
- system for carbon support mixing during PLD deposition. The highly graphitized carbon particles used as support were synthesized using metallothermic reduction. We additionally investigated the influence of deposition process parameters on the morphology of the fabricated Pt/C catalysts. Structure
- , morphology, and chemical composition of the fabricated catalysts were investigated using TEM, SEM, EDX, XPS, and Raman spectroscopy. Electrochemical measurements determined the performance of the fabricated catalysts. Results and Discussion Synthesis of a highly graphitized carbon material The synthesis of
An advanced structural characterization of templated meso-macroporous carbon monoliths by small- and wide-angle scattering techniques
Beilstein J. Nanotechnol. 2020, 11, 310–322, doi:10.3762/bjnano.11.23
- °C, for which in situ SANS experiments were performed comparing the evacuated samples with the filled state. A temperature of 3000 °C was chosen, because at this treatment temperature graphitized carbon forms, which possesses advantageous properties such as high electronic conductivity. The porosity
Synthesis of amorphous and graphitized porous nitrogen-doped carbon spheres as oxygen reduction reaction catalysts
Beilstein J. Nanotechnol. 2020, 11, 1–15, doi:10.3762/bjnano.11.1
- microporosity of the materials is critical for an efficient ORR. Keywords: amorphous carbon; graphitized carbon; hydrothermal carbonization; nitridation; nitrogen doping; oxygen reduction reaction (ORR); porosity; Introduction Fuel cells and metal–air batteries are important renewable energy technologies
- similar trend is found for the N-doped/nitrided graphitized carbon spheres, which show a higher content of graphitic N for the samples treated at 850 °C and 1000 °C, while mainly the amount of pyrrolic N decreases slightly. Here we want to mention that the N 1s signal of the catalysts nitrided at high
- present findings underline that the metal (oxy)nitride shell of the composite catalysts does not lead to a general improvement of their ORR performance. Within the present series of catalysts, the non-graphitized carbon spheres nitrided at 1000 °C are the most suitable Pt-free ORR catalysts. Further work
Uniform cobalt nanoparticles embedded in hexagonal mesoporous nanoplates as a magnetically separable, recyclable adsorbent
Beilstein J. Nanotechnol. 2018, 9, 1770–1781, doi:10.3762/bjnano.9.168
- corresponding to the plane of a fcc Co crystal can be observed clearly, which is consistent with the XRD data in Figure 1. The Co nanoparticles are surrounded by a CoAl2O4 phase and a thin graphitized carbon layer, implying that the PDA@LDH composite is converted completely to the hexagonal NPLs-2.5-800
Sheet-on-belt branched TiO2(B)/rGO powders with enhanced photocatalytic activity
Beilstein J. Nanotechnol. 2018, 9, 1550–1557, doi:10.3762/bjnano.9.146
- vibrational modes of the TiO2(B) phase [28], which is in agreement with the XRD and HRTEM results. A weak Raman peak located at 1657 cm−1 can be discerned in the TGN sample, which corresponds to the G band (graphitized carbon), confirming the existence of graphene in the powders [31]. The peak intensity
Structural transitions in electron beam deposited Co–carbonyl suspended nanowires at high electrical current densities
Beilstein J. Nanotechnol. 2015, 6, 1298–1305, doi:10.3762/bjnano.6.134
- opaque portion on the left is polycrystalline cobalt while the transparent region on the right is graphitized carbon. The SAED pattern taken on the big central grain (55 nm wide and 65 nm long, blue circled), after a tilt of the sample, is shown in the upper panel. The spots arranged in a diamond lattice
- electromigration), but also geometrical factors represented by the suspended geometry and nanosize dimension of the conductor, and the highly-resistive nanogranular material. Let us first consider the materials obtained at the end of the electrical measurements: polycrystalline FCC cobalt and graphitized carbon
- nanoparticles and nanowires in the diameter range of tens of nanometers [33]. Concerning graphitized carbon, this material is formed around the Co grains, acting as catalyzers, under the combined action of high temperature and nanograin motion, as reported in similar amorphous C nanowires loaded with Fe
Magnesium batteries: Current state of the art, issues and future perspectives
Beilstein J. Nanotechnol. 2014, 5, 1291–1311, doi:10.3762/bjnano.5.143
- fascinating advancements in Li-ion batteries have resulted in a state of the art battery which uses graphitized carbon as the anode, a transition metal oxide as the cathode, coupled such that 240 Wh kg−1, 640 Wh L−1 are provided for thousands of cycles [1]. The wide spread use of Li-ion battery, has been and
Design criteria for stable Pt/C fuel cell catalysts
Beilstein J. Nanotechnol. 2014, 5, 44–67, doi:10.3762/bjnano.5.5
- graphitized carbon support. Indeed, it can be qualitatively seen in the IL-TEM micrographs (Figure 9) that the largest initial inter-particle distances are observed for the Pt/C 5 nm, followed by the Pt/C 3 nm catalyst, and only very small inter-particle distances are present for the Pt/LSA-C II and the Pt
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