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Anodic synthesis and XPS analysis of La 1‐x .Na x Cu 2 O 4
Author(s) -
Zhao LiangZheng,
Zhang JinRiao,
Xu CuiYing,
Liu ShiHong
Publication year - 1999
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19990170207
Subject(s) - chemistry , x ray photoelectron spectroscopy , covalent bond , molten salt , electrochemistry , crystallography , metal , crystal structure , precipitation , single crystal , salt (chemistry) , phase (matter) , analytical chemistry (journal) , inorganic chemistry , chemical engineering , electrode , organic chemistry , physics , meteorology , engineering
The single phase La 1‐x Na x Cu 2 O 4 crystals were synthesized by an electrochemical method from molten KOH/NaOH/KNO 3 at 280–300°C while La 2‐y Na y CuO 4 were prepared by precipitation from the same molten salt. The resulting crystals were characterized by using SEM, XRD, EDX and XPS. XPS analysis revealed that the La3d satellite structures of La 1‐x Na x Cu 2 O 4 were quite different from those of La 2‐y Na y CuO 4 . These differences have been attributed tyo the changes in crystal structures, bond lengths and covalent character of the metal‐ligand bonds.