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Liquid Organic Hydrogen Carrier (LOHC) systems represent a promising option for hydrogen storage and transport in chemically bound and infrastructure-compatible form. For multiple use of the carrier liquid in repetitive...

Uniaxial-stress experiments have been performed for the 3287- and 2445-cm−1 local vibrational modes assigned to the positive charge state of interstitial hydrogen and deuterium , respectively, occurring in mono-crystalline rutile TiO2. The onset of the defect alignment under the stress applied perpendicular to the [001] axis is detected at 165 K (185 K), which corresponds to the activation energy of 0.53 eV (0.58 eV) for interstitial hydrogen (deuterium). Based on these findings the diffusion constants of and along the [001] axis of TiO2 are determined. The experimental data are complemented by density-functional theory calculations and compared with the earlier results on the diffusion of / at elevated temperatures up to 700 °C. It is found that the activation energy value deduced from our low-temperature stress measurements yields a very good agreement with the high-temperature data, covering a dynamic range of 12 orders of magnitude.

Enhanced indirect ferromagnetic p-d exchange coupling of Mn in oxygen rich ZnO:Mn nanoparticles synthesized by wet chemical method J. Appl. Phys. 111, 033503 (2012); 10.1063/1.3679129Time-delayed transformation of defects in zinc oxide layers grown along the zinc-face using a hydrothermal technique