Solubility of deuterium in alumina nanopowders

Abstract

The paper presents data on the effect of surface oxygen deficiency in nanoparticles on the catalytic properties of oxide nanopowders. Data on the interaction of nanopowders with gaseous hydrogen are the test modeling catalytic properties. Alumina nanopowders synthesized using laser evaporation of a ceramic target dissolve deuterium during their annealing in gaseous deuterium. It is only the surface atomic layer of nanoparticles with very large oxygen deficiency that has the ability to dissolve deuterium. Oxygen deficiency and deuterium solubility are adjustable properties of nanoparticles. They can be changed by annealing nanopowders in oxygen. Vykhodets V.B., Jarvis E., Kurennykh T.E., Beketov I.V., Obukhov S.I., Samatov O.M., Medvedev A.I., Davletshin A.E., Whyte T. Inhomogeneous depletion of oxygen ions in oxide nanoparticles. Surface Science, 2016, vol. 644, pp. 41-147. DOI: 10.1016/j.susc.2015. Jarvis E.A.A., Carter E.A. Metallic Character of the Al 2 O 3 (0001)-( 31 x 31 )R  9° Surface Reconstruction. J. Phys. Chem B, 2001, vol. 105, iss. 18, pp. 4045-4052. DOI: 10.1021/jp003587c. 4.French T.M., Somorjai Gabor A. Composition and surface structure of the (0001) face of -alumina by low-energy electron diffraction. J. Phys. Chem., 1970, vol. 74, no. 12, pp. 2489-2495.Sundaresan A., Bhargavi R., Rangarajan N., Siddesh U., Rao C. N. R. Ferromagnetism as a universal feature of nanoparticles of the otherwise nonmagnetic oxides. Phys. Rev. B, 2006, vol. 74, iss. 16, pp. 161306(R). DOI: 10.1103/PhysRevB.74.161306. 6. Sudakar C., Kharel P., Suryanarayanan R., Thakurc J.S., Naikd V.M., Naika R., Lawes G. Room temperature ferromagnetism in vacuum-annealed TiO 2 thin films. JMMM, 2008, vol. 320, iss. 5, pp. L31-L36. DOI: 10.1016/j.jmmm.2007 Hong N., Sakai J., Poirot N., Brisé V. Room-temperature ferromagnetism observed in undoped semiconducting and insulating oxide thin films. Phys. Rev. B, 2006, vol. 73, iss. 13, pp. 132404. DOI: 10.1103 Coey J.M.D. High-temperature ferromagnetism in dilute magnetic oxides.