Issue 8, 1983

Reduced forms of LaNiO3 perovskite. Part 1.—Evidence for new phases: La2Ni2O5 and LaNiO2

Abstract

Low-temperature reduction of LaNiO3 under hydrogen leads to new compounds such as La2Ni2O5 and LaNiO2 before total reduction. Hydrogen consumption, X-ray diffraction and XANES demonstrate the presence of these new phases. Ni3+ in LaNiO3 becomes Ni2+ in La2Ni2O5, and a pure monovalent nickel phase is obtained in LaNiO2. After this stage nickel leaves the structure as nickel metal. Before total reduction, reversible reoxidation of La2Ni2O5 and LaNiO2 leads to the original structure of the LaNiO3 perovskite.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 2, 1983,79, 1181-1194

Reduced forms of LaNiO3 perovskite. Part 1.—Evidence for new phases: La2Ni2O5 and LaNiO2

M. Crespin, P. Levitz and L. Gatineau, J. Chem. Soc., Faraday Trans. 2, 1983, 79, 1181 DOI: 10.1039/F29837901181

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