Nd2 − x Ca x CoO4 ± δ-based materials demonstrated high effectiveness in partial methane oxidation into synthesis gas with almost 100% selectivity. It has been determined that Nd2 − x Ca x CoO4 ± δ materials synthesized via the solid-state or cryochemical methods are single-phase in the range of 0.6 ≤ x ≤ 1 at a synthesis temperatures of 1100–1200°C. Synthesis at t ≤ 1100°C allows to prepare solid solutions in the range of 0.9 < x < 1.05.
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Дедов et al. (2014) studied this question.
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