Absolute ground state atomic hydrogen densities were measured, by the utilization of two-photon absorption laser induced fluorescence, in a low-pressure electron cyclotron resonance plasma as function nitrogen admixtures—0 to 5000 ppm. At admixtures 1500 ppm and higher, spectral distribution fluorescence changes from single Gaussian double distribution; this is due separate, nascent contributio...

Abstract First‐principles computations are performed to investigate the catalytic oxidation of CO on a Ti‐decorated Cr 2 TiC O MXene monolayer, through comprehensive analysis charge transfer, electronic density states, and difference interacting systems. By comparing reaction energy barriers, it is found that, rather than traditional Langmuir–Hinshelwood, Eley–Rideal, Mars‐van Krevelen (MvK) me...

To study the role of MgO in reduction N2O circulating fluidized bed boilers, density functional theory was used to evaluate heterogeneous decomposition. The interference SO2 and CO on considered. (100) is a two-step process that includes O transfer surface recovery processes. rate-determining step with barrier energy 1.601 eV, while for Langmuir–Hinshelwood Eley–Rideal mechanisms, energies are ...

In situ broad band sum frequency generation (SFG) spectroscopy was applied to clarify the oxidation mechanism of adsorbed CO on Pt(1 1 1) electrode in alkaline solution comparison with that acidic solution. A single SFG peak due on-top site observed region 1950 – 2150 cm−1. While proceeded a nucleation-growth mode via Langmuir–Hinshelwood (L-H) by reacting OH main 0.1 M HClO4 solution, oxidized...

Moore, G. R., Huang, Z.-X., Eley, C. G. S., Barker, H. A., Williams, G., Robinson, M. N. & Williams, R. J. P. (1982) Furuduy Discuss. Chem. SOC. 74, 31 1-329 Papa, S. (1976) Biochim. Biophys. Acta 456, 39-84 Slater, E. C. (1983) Trends Biochem. Sci. 8, 239-245 Wikstrom, M. K. F. & Krebs, K. (1979) Biochim. Biophys. Acta 549, 177-222 Williams, R. J. P. (1961) J. Theor. Biol. 1, 1-17 Williams, R....

Abundant molecular oxygen was discovered in the coma of comet 67P/Churyumov-Gerasimenko. Its origin was ascribed to primordial gaseous O2 incorporated into the nucleus during the comet's formation. This thesis was put forward after discounting several O2 production mechanisms in comets, including photolysis and radiolysis of water, solar wind-surface interactions and gas-phase collisions. Here ...

This article reports a model study aimed at the detailed description of the mechanism of formation of molecular hydrogen onto dust grain surfaces in the interstellar medium. Using classical trajectories (CT) and quasi-classical trajectories (QCT) calculations, the H2 recombination from the Eley-Rideal process has been studied. This reactive process, involving the collision between one gas phase...

The mechanism of the CO oxidation promoted by a neutral Ag(55) cluster was investigated extensively, using density functional theory calculations. The CO oxidation process catalyzed by anionic and cationic Ag(55) clusters was also studied, to clarify the effects of the charge state. The Eley-Rideal (ER) and Langmuir-Hinshelwood (LH) mechanisms were discussed in detail. Six reaction pathways wer...

Quasiclassical trajectory studies have been performed for the reaction between an H ~or D! atom incident from the gas phase and a H ~or D! atom adsorbed onto a Cu~111! surface. Results from a density functional calculation of the interaction between H and a Cu~111! surface are used to construct a detailed potential energy surface which contains all six nuclear degrees of freedom. Impacts of the...