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Nanostructured α- and β-cobalt hydroxide thin films

“…Hence, the reported structures are likely not metal hydroxides of octahedral coordination with metal/hydroxide stoichiometry of 1:2, and as such are not polymorphs of ␤-Co(OH) 2 . Rather, the alpha phase(s) suggest cobalt hydrotalcite-like (Co-HT) structure as observed in layered double hydroxides, having a net positive charge between brucite-like layers and charge compensation balanced by anions such as nitrate, carbonate, or chloride in the interlayer space [12][13][14][15][16][17][18][19][20]. The net charge imbalance in these cobalt hydroxides can be established by two mechanisms: hydroxyl deficiencies, or polyvalent cobalt ions in the layers [13,14,[17][18][19].…”

“…Rather, the alpha phase(s) suggest cobalt hydrotalcite-like (Co-HT) structure as observed in layered double hydroxides, having a net positive charge between brucite-like layers and charge compensation balanced by anions such as nitrate, carbonate, or chloride in the interlayer space [12][13][14][15][16][17][18][19][20]. The net charge imbalance in these cobalt hydroxides can be established by two mechanisms: hydroxyl deficiencies, or polyvalent cobalt ions in the layers [13,14,[17][18][19]. In the former case the structure is related to formal layered double hydroxides, but contains only divalent cations with vacancies in the brucite layers, and has also been reported occurring in zinc and nickel salts [14,[19][20][21].…”

“…The net charge imbalance in these cobalt hydroxides can be established by two mechanisms: hydroxyl deficiencies, or polyvalent cobalt ions in the layers [13,14,[17][18][19]. In the former case the structure is related to formal layered double hydroxides, but contains only divalent cations with vacancies in the brucite layers, and has also been reported occurring in zinc and nickel salts [14,[19][20][21]. In the latter case, the ␣-Co(OH) 2 is isostructural with the mineral hydrotalcite (Mg 6 Al 2 (OH) 16 [17][18][19].…”

A Facile Hydrothermal Route to Flower‐Like Cobalt Hydroxide and Oxide

“…[9,10] In particular, Kurmoo has reported the incorporation of different anions into the interlayers of cobalt hydroxide to form organic magnetic materials. [11] The preparation of single-crystalline β-Co(OH) 2 nanosheets is easily achieved because of their intrinsic lamellar structures.…”

Cobalt Electrodeposition Onto Stainless Steel 304 From Ammoniacal Solutions

“…Several studies suggest that the cobalt films can be electrodeposited onto an SSE, if the deposition time and the cobalt concentration in solution can be controlled 2,3,4 . Thus, in such studies the thickness of the deposited film and the rate of mass deposition are the main parameters to analyze 1,2,[4][5][6][7] . Cobalt electrodeposition onto SSE has been analyzed from sulfate and nitrate solutions 3 while containing boric acid, ammonium citrate, tartaric acid and sodium chloride have been studied for cobalt plating baths 4 .…”