Abstract An FeCeOx solid solution with an Fe/Ce molar ratio of 1 was obtained via a modified sol-gel method. The promotional effect of Fe3+ ions in the lattice of cubic CeO2 for catalytic reduction of NO with NH3 was studied. The NO conversion over the FeCeOx catalyst was obviously higher than those over CeO2 and Fe2O3 catalysts. FeCeOx was characterized by using XRD, TEM, and XANES, etc. The experimental results revealed that Fe substituted Ce in CeO2 to form an Fe–O–Ce solid solution with high activity for catalytic reduction of NO. The atomic and electric structures of the FeCeOx catalyst were studied to explain the enhanced catalytic activity.

中文翻译：

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具有改进活性的 FeCeOx 用 NH3 催化还原 NO

摘要 采用改进的溶胶-凝胶法制备了Fe/Ce摩尔比为1的FeCeOx固溶体。研究了立方CeO2晶格中Fe3+离子对NH3催化还原NO的促进作用。FeCeOx 催化剂的 NO 转化率明显高于 CeO2 和 Fe2O3 催化剂。FeCeOx 通过XRD、TEM 和XANES 等进行表征。实验结果表明Fe 取代CeO2 中的Ce 形成Fe-O-Ce 固溶体，具有高催化还原NO 的活性。研究了 FeCeOx 催化剂的原子和电结构以解释增强的催化活性。