Croissance cristalline et étude structurale de Co3O4

Growth and characterization of thin epitaxial Co3O4(1Vaz1, Henrich2, Ahn3 et al. 2009Journal of Crystal Growth32150View full textAdd to dashboardCite

“…Of the three known cobalt oxides, the mixed valence compound, Co 2þ Co 3þ 2 O 4 , is stable at ambient pressure and temperature and crystallizes in the cubic spinel structure (with lattice constant a ¼ 8:086Å [1]), while the high temperature CoO phase crystallizes in the rock salt structure. Also reported in the literature is a sesquioxide of cobalt, Co 2 O 3 , crystalizing in the corundum structure [2,3] (ab initio calculations suggest this phase to be a stable energy minimum [4]).…”

Mono‐ and Bimetallic Ni−Co Catalysts in Dry Reforming of Methane

“…The XRD peaks in Co 3 O 4 spinel are overlapping with those of θ‐Al 2 O 3 , [19,22] except at ca. 20° for Co 3 O 4 which can be better separated from θ‐Al 2 O 3 (Figure 1 and Figure S1).…”

Sodium Transition Metal Vanadates from Hydrothermal Brines: Synthesis and Characterization of NaMn4(VO4)3, Na2Mn3(VO4)3, and Na2Co3(VO4)2(OH)2

“…Initially, cobalt (II, III) oxide (0.082 g, 0.340 mmol) and vanadium(V) oxide (0.088 g, 0.485 mmol) in a 0.7:1 molar ratio, along with 3 m NaOH/1 m NaCl mineralizer were reacted as described above. Small dark blue tabular crystals of 3 were identified in very low yield along with black crystals of Co 3 O 4 . However, when the reaction was changed to react cobalt(II) oxide (0.036 g, 0.485 mmol) and V 2 O 5 (0.088 g, 0.485 mmol) in a 1:1 ratio with 5 m NaOH as the mineralizer, large dark blue rods of 3 were isolated in higher yield, but still only comprise about 40 % of the product.…”