Graphitic carbon nitrides are investigated for developing highly durable Pt electrocatalyst supports for polymer electrolyte fuel cells (PEFCs). Three different graphitic carbon nitride materials were synthesized with the aim to address the effect of crystallinity, porosity, and composition on the catalyst support properties: polymeric carbon nitride (gCNM), poly(triazine) imide carbon nitride ...

In this work, a nitrogen-containing bidentate ligand named 5,5′-(9-octyl-9H-carbazole2,7-diyl)bis(1,10-phenanthroline) (OCBP) was synthesized as a nitrogen precursor for making an oxygen reduction catalyst. The 1,10-phenanthroline unit provides a coordination site for copper ions, and the resulting Cu-Nx unit may be responsible for the catalytic activities of the catalyst. Carbon black was sele...

Pd nanoparticles deposited by sol-immobilization on N-doped nanocarbon (carbon nanotube-like from Pyrograf Products; N-CNT-like) is studied in the direct synthesis of H2O2 and compared with those of the undoped catalysts or prepared by the same Pd deposition method on active carbon (Vulcan XC-72) as the support. The catalytic tests were carried out using a slurry batchor semi-continuous reactor...

Using density functional theory with local and non-local exchange and correlation (XC) functionals, as well as the Green’s function quasiparticle (GW) approach, we study the electronic structure of hexagonal boron nitride (h-BN) sheets, both pristine and doped with carbon. We show that the fundamental band gap in two-dimensional h-BN is different from the gap in the bulk material, and that in t...

XC cells, derived from a Rous sarcoma virus-induced Wistar strain rat tumor, form syncytia when cultured in the presence of murine leukemia virus-producing mouse cells. However, one XC cell culture (designated as XC-v cells), found to produce type C virus particles, fails to form syncytia in the presence of murine leukemia virus-producing mouse cells. Coculture of XC-v cells and XC cells negati...

Platinum (Pt)-based electrocatalysts supported by reduced graphene oxide (RGO) were synthesized using two different methods, namely: (i) a conventional two-step polyol process RGO as the substrate, and (ii) modified implicating simultaneous reduction of Pt nanoparticle precursor (GO). The structure, morphology, electrochemical performances obtained Pt/RGO catalysts studied compared with referen...

We report a detailed experimental study of peculiar thixotropic dynamics carbon black (CB, Vulcan XC-72) suspensions in mineral oil, specifically the observation sequential stress increase then decrease at fixed shear rate step-down test. verify that such dynamics, though peculiar, come from true material response rather than artifacts. also reveal how this long-time decay is associated with an...

XC cells, derived from a Rous sarcoma virus-induced Wistar strain rat tumor, form syncytia when cultured in the presence of murine leukemia virus-producing mouse cells. However, one XC cell culture (designated as XC-v cells), found to produce type C virus particles, fails to form syncytia in the presence of murine leukemia virus-producing mouse cells. Coculture of XC-v cells and XC cells negati...

BACKGROUND The purpose of this observational study was to investigate the relationship between splanchnic and renal blood flow during infrarenal aortic cross-clamp (XC) and postoperative gastrointestinal perfusion and function. METHODS Descending aortic blood flow (DABF) was continuously monitored with an oesophageal Doppler monitor (Cardio-Q, Deltex Ltd, Chichester, UK) in 31 patients underg...