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Ni-Fe hydrotalcites with Ni/Fe molar ratios of 1, 2, 3, 6 and 10 were prepared by coprecipitation. TG-DTA results showed that the hydrotalcites decomposed in two stages, corresponding to two endothermic peaks around 200 and 300°C. After calcination at 400°C, the hydrotalcites were converted to NiFeO mixed oxides with high surface areas around 100 m 2 /g, which exhibited the XRD pattern of...
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