G.: A measurement of the diffusion coefficient of hydrogen peroxide vapor into air, J. Am. Chem. Soc., 70(11), 3755-3758, 1948.McMurtrie, R. L., and Keyes, F. G.: A measurement of the diffusion coefficient of 25 hydrogen peroxide vapor into air, J. Am. Chem. Soc., 70, ...
Presents a study in which an assessment is made of single and double potential step chronoamperometry (SPSC and DPSC, respectively) at Pt disk ultramicroelectrodes (UMEs) as methods for determining the value of the diffusion coefficient of hydrogen in aqueous solutions. How currents for the oxi...
, and it has a large flamepropagation velocity[9]. Also, it can easily leak out of containers because of its ultra-small molecule size, causing sudden explosions due to its high diffusion coefficient in air (0.6 cm2/s)[10,11]. Even though it is non-toxic, it can lead to asphyxia ...
Additionally, higher martensite content decreases the hydrogen diffusion coefficient in both as-quenched and tempered conditions. In slow strain rate tests, DP-LASs samples with approximately 50% tempered martensite exhibited the highest HE resistance. These findings offer new insights into the ...
(9)–(12)), which was close to the reported value of oxygen diffusion coefficient in air (2 × 10−1 cm2 s−1)35. In contrast, microporous diffusion layer of traditional GDE is densely structured, and the pore structures for O2 diffusion are very scarce (Supplementary Fig. ...
Measurement of the Diffusion Coefficient and Solubility of Hydrogen in Solid Aluminum For the specimen melted in air and solidified in a metal mold, it was found to decrease the diffusivity and to increase the solubility as compared with... M Ichimura,M Imabayashi,M Hayakawa - 《Journal of th...
The proton insertion/extraction kinetics was assessed using the equation: i = aνb, where i is the current response, a is an adjustment coefficient, ν is the sweep rate and the power exponent b is a parameter to analyze the kinetics50,51. A b value of 0.5 means diffusion-...
Herein we propose a superhydrophobic natural air diffusion electrode (NADE) to greatly improve the oxygen diffusion coefficient at the cathode about 5.7 times as compared to the normal gas diffusion electrode (GDE) system. NADE allows the oxygen to be naturally diffused to the reaction interface, ...
We first look into the interface–Pd bulk regime, which can evaluate the impact of ZIF-8 coating on hydrogen spillover and diffusion into Pd bulk, using Au/Pd/ZIF-8 as a model (Fig.2a). In this modular construction, Au/Pd/ZIF-8 is a core–shell structure based on Au nanorods (Supp...
By combining the experimental data and state-of-the-art models, we discuss the recent progress in understanding crossover mechanisms. The dominant mechanism for hydrogen crossover is the diffusion driven by both the high hydrogen partial pressures at the cathode and supersaturation in the catalyst ...