Abstract

Perovskite-type complex oxides GdFeO₃ and GdCo_0.5Fe_0.5O₃ synthesized by the sol–gel method and gadolinium ferrite modified with cobalt oxide (5 wt %) are studied as catalysts for the dry reforming of methane. Single-phase catalysts with the perovskite orthorhombic crystal structure and an average particle size of 100–200 nm are synthesized. Catalytic activity testing shows that the surface modification of gadolinium ferrite with cobalt, as well as the introduction of Co directly into the crystal structure to form a GdCo_0.5Fe_0.5O₃ solid solution, leads to the formation of new catalytically active sites and provides an increase in the activity of GdFeO₃. The sample with cobalt oxide deposited on the surface is highly resistant to coking.

中文翻译：

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GdFeO 3催化剂体系中钴对甲烷干重整制合成气活性的影响

摘要

研究了通过溶胶-凝胶法合成的钙钛矿型复合氧化物GdFeO ₃和GdCo _0.5 Fe _0.5 O ₃以及用氧化钴（5 wt％）改性的fer铁氧体作为甲烷干重整的催化剂。合成具有钙钛矿正交晶结构和平均粒径为100-200 nm的单相催化剂。催化活性测试表明，with对铁氧体进行钴表面改性，以及将Co直接引入晶体结构以形成GdCo _0.5 Fe _0.5 O ₃固溶体，导致形成新的催化活性位点，并提供GdFeO的活性增加₃。具有沉积在表面上的氧化钴的样品高度抗结焦。