Synthesis and crystal structure of a new heteronuclear complex of Fe(iii)-K designed to produce effective catalysts for CO hydrogenation

Razmara Zohreh; Janczak Jan

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Synthesis and crystal structure of a new heteronuclear complex of Fe(iii)-K designed to produce effective catalysts for CO hydrogenation

机译：Fe（III）-K新型异核络合物的合成和晶体结构，用于生产用于共氢化的有效催化剂

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A new paramagnetic heteronuclear complex formulated as [K3Fe(mu-ox)(3)(H2O)(3)](n)(1), where ox(2-)is oxalate, has been synthesized under hydrothermal condition. The molecular structure of complex1was characterized by elemental analysis, Fourier-transform infrared spectroscopy (FT-IR) and single-crystal X-ray diffraction (SCXRD). The results of SC-XRD analysis revealed that complex1crystallizes in the centrosymmetric space groupP2(1)/cof a monoclinic system with cell dimensiona= 7.7175 (4) angstrom,b= 19.8009 (7) angstrom,c= 10.2623 (5) angstrom, and beta= 107.634 (5)degrees at 100 K. The thermal behavior of complex1was studied by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The magnetic behavior of complex1was studied at room temperature by a vibration sample magnetometer (VSM). Thermal decomposition of the silica and alumina supports of complex1at 650 degrees C resulted in the main catalysts, Fe2O3-K2O/SiO(2)and Fe2O3-K2O/Al2O3. The catalytic activity of the main catalysts was evaluated for CO hydrogenation. For comparative purposes, the reference catalysts of Fe2O3-K2O/SiO(2)and Fe2O3-K2O/Al(2)O(3)were prepared by the impregnation method. The structure and composition of the catalysts were investigated by FT-IR spectroscopy, powder X-ray diffraction (PXRD), N(2)adsorption-desorption analysis, scanning electron microscopy (SEM), inductively coupled plasma atomic emission spectroscopy (ICP-AES) and energy dispersive X-ray analysis (EDX). We tested all catalysts for hydrogenation of CO at 5 bar of pressure in the temperature range of 593-673 K. It was found that the main catalysts have better CO conversion and selectivity to desired products, such as light olefins, than the reference catalysts.

机译：一种新的顺磁性异核复合物配制为[k3Fe（mu-ox）（3）（3）（3）（3）（3）]（n）（n）（1），其中牛（2-）是草酸盐，在水热条件下合成。复合物的分子结构，其特征在于元素分析，傅里叶变换红外光谱（FT-IR）和单晶X射线衍射（SCXRD）。 SC-XRD分析的结果显示，在Cellosymmetric Spacep2（1）/ COF中的复合体1crystalliz化，具有细胞维度α= 7.7175（4）埃，B = 19.8009（7）埃，C = 10.2623（5）埃，和β= 107.634（5）次以100k。通过热重分析（TGA）和差分热分析（DTA）研究了复合物的热行为。通过振动样品磁力计（VSM）在室温下研究复合物的磁性。二氧化硅和氧化铝载体的热分解650℃得到的主要催化剂，Fe2O3-k 2 O / SiO（2）和Fe 2 O 3-K 2 O / Al 2 O 3。评价主要催化剂的催化活性用于共氢化。出于比较目的，通过浸渍方法制备Fe 2 O 3-K 2 O / SiO（2）和Fe 2 O 3 -K 2 O / Al（2）O（3）的参考催化剂。通过FT-IR光谱研究催化剂的结构和组合物，粉末X射线衍射（PXRD），N（2）吸附 - 解吸分析，扫描电子显微镜（SEM），电感耦合等离子体原子发射光谱（ICP-AES ）和能量分散X射线分析（EDX）。我们在593-673k的温度范围内以5巴的压力测试了用于氢化CO的所有催化剂。发现主催化剂具有更好的CO转化和选择性，比参考催化剂如光烯烃。

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《Dalton transactions: An international journal of inorganic chemistry》 |2020年第30期|共11页
作者
Razmara Zohreh; Janczak Jan;
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Univ Zabol Dept Chem POB 98613-35856 Zabol Iran;

Polish Acad Sci Inst Low Temp &

Struct Res POB 1410 Okolna 2 Str PL-50950 Wroclaw Poland;

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1. Synthesis and crystal structure of a new heteronuclear complex of Fe(iii)-K designed to produce effective catalysts for CO hydrogenation [J] . Razmara Zohreh, Janczak Jan Dalton transactions: An international journal of inorganic chemistry . 2020,第30期

机译：Fe（III）-K新型异核络合物的合成和晶体结构，用于生产用于共氢化的有效催化剂
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Synthesis and crystal structure of a new heteronuclear complex of Fe(iii)-K designed to produce effective catalysts for CO hydrogenation

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