Thermal stability of monometallic Co-hydrotalcite

Beatriz Zapata; Pedro Bosch; Miguel A. Valenzuela; Geolar Fetter; Sergio O. Flores; Ivan R. Cordova

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Thermal stability of monometallic Co-hydrotalcite

机译：单金属共水滑石的热稳定性

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Monometallic Co_6~(2+) Co_2~(3+) (OH)~- _(16)(NO_3)~- _2·nH_2O hydrotalcite-like compound was prepared by a careful precipitation from an aqueous solution of Co(NO_3)_2·6H_2O in air atmosphere, followed by microwave irradiation. As comparison, an additional sample was prepared without microwave irradiation, employing aging in the crystallization step. Thermal evolution was studied by X-ray diffraction (XRD), FTIR, DTA/TGA and nitrogen physisorption. The microwaved sample (monometallic hydrotalcite) was stable up to 200℃. The nonirradiated sample only showed the Co_3O_4 spinel phase.

机译：通过从Co（NO_3）_2水溶液中小心沉淀制备单金属Co_6〜（2+）Co_2〜（3+）（OH）〜-（16）（NO_3）〜-_2·nH_2O类水滑石化合物·空气中的6H_2O，然后进行微波照射。作为比较，在结晶步骤中采用时效，在没有微波辐射的情况下制备了另外的样品。通过X射线衍射（XRD），FTIR，DTA / TGA和氮物理吸附研究了热演化。微波处理的样品（单金属水滑石）在200℃以下仍稳定。未经辐照的样品仅显示出Co_3O_4尖晶石相。

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来源
《Materials Letters》 |2002年第3期|p.679-683|共5页
作者
Beatriz Zapata; Pedro Bosch; Miguel A. Valenzuela; Geolar Fetter; Sergio O. Flores; Ivan R. Cordova;
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作者单位

Gerencia de Catalisis, Instituto Mexicano del Petroleo, Eje Central Lazaro Cardenas 152, 07730 Mexico, D.F., Mexico;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类工程材料学;
关键词
co-hydrotalcite; microwave irradiation; thermal properties; catalysts;

机译：共水滑石微波辐射热性能;催化剂;

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1. Coments on "Infrared emission spectroscopic studies of the thermal transformation of Mg-, Ni- and Co-hydrotalcite catalysts" [Appl. Catal. A: Gen. 184(1999) 61-71] [J] . J. Perez-Ramirez, G. Mul, F. Kapteijn, Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications . 2000,第2期

机译：关于“ Mg-，Ni-和Co-水滑石催化剂热转化的红外光谱研究”的评论。卡塔尔。 A：Gen。184（1999）61-71]
2. Reply on "Comments on 'Infrared emission spectroscopic studies of the thermal transformation of Mg-, Ni- and Co-hydrotalcite catalysts' by J. Perez-Ramirez, G. Mul, F. Kapteijn and J.A. Moulijn" [J] . Kloprogge JT., Frost RL. Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications . 2000,第2期

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Thermal stability of monometallic Co-hydrotalcite

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