Preparation of Self-doped La1-x MnO3+δ Polycrystalline by Electrochemical Deposition

Abstract

Abstract: The perovskite-type self doped La_1-x MnO ³⁺ δ was prepared by heat treatment of the gel precursor deposited on a Pt electrode in solutions containing both La ³⁺ and Mn ²⁺ ions using catholic reduction electrochemical method. The influence of molar ratio of La ³⁺ and Mn ²⁺ in solution, deposition potential and current density on product composition was investigated. Our results indicate that varying the ratio of La ³⁺ and Mn ²⁺ in solution, deposition potential or current density can conveniently control the product composition, lattice deficiencies and hence the self-doping level x. In addition, the transport properties are mainly influenced by Mn ⁴⁺ content and ion vacancies for the self-doped manganites.

Key words: Perovskite, Electrochemical preparation, Synthesis mechanism, Transport property

CLC Number:

O611.4

TrendMD:

HUANG Yun-Hui, WANG Zhe-Ming, ZHU Tao, CHEN Xing, LIAO Chun-Sheng, YAN Chun-Hua . Preparation of Self-doped La_1-x MnO_3+δ Polycrystalline by Electrochemical Deposition[J]. Chem. J. Chinese Universities, 2001, 22(1): 6.

References

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