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Title: Investigation of the hydrogen capacity of composites based on ZnOCu

Abstract

The composites ZnOCuH(D) saturated with hydrogen (deuterium) to a content of {approx}1 wt % are investigated by the neutron scattering methods. Upon cooling of the samples (the ZnO matrix containing Cu crystals {approx}10 nm in size) from 300 to 4 K, hydrogen (deuterium) is condensed on the cluster surface and penetrates inside the clusters in which the atomic hydrogen content with respect to copper can be as high as 30% at 20 K. Simultaneously, hydrogen fills nanopores of the ZnO matrix. It is revealed that, at temperatures of 90-300 K, approximately one-third of the hydrogen amount participates in the fast diffusion (the diffusion constant is approximately equal to 8 x 10{sup -5} cm{sup 2}/s) and the other two-thirds are immobilized. At 20 K, the fraction of mobile hydrogen decreases to {approx}10%. An analysis of the results obtained demonstrates that the energy barriers retaining hydrogen in defect regions are relatively low.

Authors:
; ; ;  [1];  [2]; ;  [3]; ;  [4]
  1. Russian Academy of Sciences, Petersburg Nuclear Physics Institute (Russian Federation)
  2. Research Institute for Solid State Physics and Optics (Hungary)
  3. University of Amsterdam, Department of Chemical Engineering (Netherlands)
  4. Russian Academy of Sciences, Boreskov Institute of Catalysis, Siberian Division (Russian Federation)
Publication Date:
OSTI Identifier:
21090911
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 52; Journal Issue: 3; Other Information: DOI: 10.1134/S1063774507030248; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CAPACITY; COPPER COMPOUNDS; CRYSTALS; DEFECTS; DIFFUSION; HYDRIDES; HYDROGEN; NEUTRON DIFFRACTION; SURFACES; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; ZINC OXIDES

Citation Formats

Trounov, V. A., E-mail: Trounov@pnpi.spb.ru, Lebedev, V. T., Sokolov, A. E., Grushko, Yu. S., Toeroek, Gy., Heuvel, J. C. van den, Batyrev, E., Yurieva, T. M., and Plyasova, L. M.. Investigation of the hydrogen capacity of composites based on ZnOCu. United States: N. p., 2007. Web. doi:10.1134/S1063774507030248.
Trounov, V. A., E-mail: Trounov@pnpi.spb.ru, Lebedev, V. T., Sokolov, A. E., Grushko, Yu. S., Toeroek, Gy., Heuvel, J. C. van den, Batyrev, E., Yurieva, T. M., & Plyasova, L. M.. Investigation of the hydrogen capacity of composites based on ZnOCu. United States. doi:10.1134/S1063774507030248.
Trounov, V. A., E-mail: Trounov@pnpi.spb.ru, Lebedev, V. T., Sokolov, A. E., Grushko, Yu. S., Toeroek, Gy., Heuvel, J. C. van den, Batyrev, E., Yurieva, T. M., and Plyasova, L. M.. Tue . "Investigation of the hydrogen capacity of composites based on ZnOCu". United States. doi:10.1134/S1063774507030248.
@article{osti_21090911,
title = {Investigation of the hydrogen capacity of composites based on ZnOCu},
author = {Trounov, V. A., E-mail: Trounov@pnpi.spb.ru and Lebedev, V. T. and Sokolov, A. E. and Grushko, Yu. S. and Toeroek, Gy. and Heuvel, J. C. van den and Batyrev, E. and Yurieva, T. M. and Plyasova, L. M.},
abstractNote = {The composites ZnOCuH(D) saturated with hydrogen (deuterium) to a content of {approx}1 wt % are investigated by the neutron scattering methods. Upon cooling of the samples (the ZnO matrix containing Cu crystals {approx}10 nm in size) from 300 to 4 K, hydrogen (deuterium) is condensed on the cluster surface and penetrates inside the clusters in which the atomic hydrogen content with respect to copper can be as high as 30% at 20 K. Simultaneously, hydrogen fills nanopores of the ZnO matrix. It is revealed that, at temperatures of 90-300 K, approximately one-third of the hydrogen amount participates in the fast diffusion (the diffusion constant is approximately equal to 8 x 10{sup -5} cm{sup 2}/s) and the other two-thirds are immobilized. At 20 K, the fraction of mobile hydrogen decreases to {approx}10%. An analysis of the results obtained demonstrates that the energy barriers retaining hydrogen in defect regions are relatively low.},
doi = {10.1134/S1063774507030248},
journal = {Crystallography Reports},
number = 3,
volume = 52,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}
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