ANALYSIS OF SPECIFIC N_2 ADSORPTION SITE BY PHOTO-EXCITATION METHOD
ANALYSIS OF SPECIFIC N_2 ADSORPTION SITE BY PHOTO-EXCITATION METHOD
光激发法对N_2特定吸附位点的分析
批准号：
08640750
负责人：
KURODA Yasushige
金额：
$1.41万
依托单位：
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
项目状态：
已结题
起止时间：
1996 至 1997
中文摘要
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英文摘要
There has been consoderable interest in the specific interaction between a dinitrogen molecule and solid materials, from the viewpoints of dinitrogen-fixation. Of particular interest has been the characterization of the chemical bonding nature between dinitrogen and the active center existing on surfaces of such solid materials. We have found that a copper-ion-excahnged ZSM-5-type zeolite strongly adsorbs N_2 at room temperature, givign the intence infrared absorption band at 2295 cm^<-1>. The focus of the present investigation is on understanding the state of N_2 adsorption sites and also the bonding state between copper ion and N_2 in more detail. Through this investigation, we have a potential to use this material as N_2-separation, -fixation, and -activation catalysts.It is also found tha the amount of N_2adsorbed, as well as CO amount, is increased with increasing exchange capacity of copper ion in this zeolite. The behavior of monolayr capcity of N_2 with ion exchange capacity ha … More s the same tendency with the area of 2151 cm^<-1> band resulting from the interaction with CO molecule. The IR spectra of the sample on which N_2 gas was introduced are measured after the adsorption and desorption of CO on cooper-ion-exchanged ZSM-type zeolite which was previously evacuated at 873 K.Photoemission spectra are also measured in N_2 adsorption stages, and it is found that the observed emission band due to Cu^4 decend its intencity with increasing N_2 pressures. These results are explained by considering that the monovalent copper ion formed in the evacuation process in vacuo is the important site for N_2 adsorption. Furthermore, the site giving an IR band at 2151 cm^<-1> through the interaction with CO molecules, as well as 540 nm-band in emission spectra, can be important one in the N_2 adsorption. Taking account of the XAFS results reported previously, it can be tentatively said that this site takes a gcometrical structure of the three- or four-coordinated one around copper through the interaction with CO or N_2 molecule Less
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Y.Kuroda et al.: "Characterization of Active Sites on Copper Ion-exchanged Mordenite for Dinitrogen Adsorption by Using CO as a Probe Molecule." Journal of Physical Chemistry. 101(in press). (1997)
Y.Kuroda 等人：“使用 CO 作为探针分子表征铜离子交换丝光沸石上二氮吸附的活性位点。”
Y.Kuroda 等人：“使用 CO 作为探针分子表征铜离子交换丝光沸石上二氮吸附的活性位点。”
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通讯作者：
Y.Kuroda, K.Yagi et al.: "Development of Site-Selective Copper-ion-exchanging Method f HZSM-5 by the Vaporization of Hexafluoroacetyoacetonato-copper Complex." J.Chem.Soc., Chem., Commun.2241-2242 (1997)
Y.Kuroda、K.Yagi 等人：“通过六氟乙酰丙酮铜配合物的汽化开发 HZSM-5 的位点选择性铜离子交换方法。”
Y.Kuroda、K.Yagi 等人：“通过六氟乙酰丙酮铜配合物的汽化开发 HZSM-5 的位点选择性铜离子交换方法。”
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Y.Kuroda, T.Watanabe et al.: "Specific Feature of Dielectric Behavior of Water Adsorbed on Ag_2O Surface." Langmuir. 13 (14). 3823-3826 (1997)
Y.Kuroda、T.Watanabe 等人：“Ag_2O 表面吸附水介电行为的具体特征”。
Y.Kuroda、T.Watanabe 等人：“Ag_2O 表面吸附水介电行为的具体特征”。
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黒田泰重: "Stabilization of Copper Metal Clusters in Mordenite Micropores : Water Treatment of Evacuated Copper Ion-exchanged Mordenite at 300K." J.Chem.Soc.,Faraday Trans.93・11. 2125-2130 (1997)
Yasushige Kuroda：“丝光沸石微孔中铜金属簇的稳定化：300K 下真空铜离子交换丝光沸石的水处理”，J.Chem.Soc.，Faraday Trans.93・11 (1997)。
Yasushige Kuroda：“丝光沸石微孔中铜金属簇的稳定化：300K 下真空铜离子交换丝光沸石的水处理”，J.Chem.Soc.，Faraday Trans.93・11 (1997)。
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黒田 泰重: "Stabilizaion of Copper Metal Clusters in Mordenite Micropores : Water Treatment of Evacuated Copper Ion-exchanged Mordenite at 300K." J.Chem.Soc.,Faraday Trans.93 (11). 2125-2130 (1997)
Yasushige Kuroda：“丝光沸石微孔中铜金属簇的稳定：300K 下真空铜离子交换丝光沸石的水处理”，J.Chem.Soc.，Faraday Trans.93 (11)。
Yasushige Kuroda：“丝光沸石微孔中铜金属簇的稳定：300K 下真空铜离子交换丝光沸石的水处理”，J.Chem.Soc.，Faraday Trans.93 (11)。
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共 18 条
Specific Adsorption of Dinitrogen Molecule at Room Temperature in Zeolite Nanospace
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批准号：06640748
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项目类别：Grant-in-Aid for General Scientific Research (C)
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资助金额：$1.34万
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财政年份：1994
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负责人：KURODA Yasushige
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依托单位：
海外基金