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The nanometric Ln-Na-Cu-O (Ln=La, Pr, Nd, Sm, Gd) perovskite-like complex oxide catalysts were prepared by sol–gel auto-combustion method using citric acid as a ligand and an adjusting agent of particle-size and morphology. Their structures and physico-chemical properties were examined by chemical analysis, XRD, SEM, FT-IR, H 2 -TPR and MS-NO-TPD. The catalytic performances of these perovskite-like...
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