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利用穆斯堡尔谱在K2 O Fe2 O3催化剂中检出了α Fe2 O3(大晶粒及微晶 )、KFeO2 、K1+ XFe11O17、α FeOOH和γ FeOOH等物相 ,它们的相对含量取决于催化剂的含钾量及煅烧温度 ,相对含量的改变导致样品的穆斯堡尔谱图出现了复杂的变化 .与XRD相比 ,穆斯堡尔谱可对钾与氧化铁的相互作用进行更有效的表征 ,穆斯堡尔谱和TPR研究都表明钾可延缓催化剂中Fe(III)的被还原 .
The relative abundance of αFe2O3 (large grains and crystallites), KFeO2, K1 + XFe11O17, αFeOOH and γFeOOH was detected in the K2 O Fe2 O3 catalyst by Mossbauer spectroscopy. The relative content of these phases depends on the catalyst Changes in relative amounts of potassium and calcination temperatures lead to complex changes in the Mössbauer spectra of the samples, and Mössbauer spectra can be used to characterize the interaction of potassium with iron oxide more efficiently than with XRD , Mossbauer spectroscopy and TPR studies all show that potassium can delay the reduction of Fe (III) in the catalyst.