| 論文名 |
Direct calorimetric measurement of enthalpy of adsorption of carbon dioxide on CD-MOF-2, a green metal-organic framework. |
| 著者 |
Di Wu
Jeremiah J Gassensmith
Douglas Gouv?a
Sergey Ushakov
J Fraser Stoddart
Alexandra Navrotsky
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| キーワード |
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| 出版年月 |
1970年1月 |
| 発表先 |
J Am Chem Soc. 2013 May 8;135(18):6790-3. |
| WEBサイト |
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| 論文概要（和文） |
緑の金属有機フレームワークであるCD-MOF-2への二酸化炭素の吸着エンタルピーの直接熱量測定。 |
| 論文概要（英文） |
The enthalpy of adsorption of CO2 on an environmentally friendly metal-organic framework, CD-MOF-2, has been determined directly for the first time using adsorption calorimetry at 25 °C. This calorimetric methodology provides a much more accurate and model-independent measurement of adsorption enthalpy than that obtained by calculation from the adsorption isotherms, especially for systems showing complex and strongly exothermic adsorption behavior. The differential enthalpy of CO2 adsorption shows enthalpy values in line with chemisorption behavior. At near-zero coverage, an irreversible binding event with an enthalpy of -113.5 kJ/mol CO2 is observed, which is followed by a reversible -65.4 kJ/mol binding event. These enthalpies are assigned to adsorption on more and less reactive hydroxyl groups, respectively. Further, a second plateau shows an enthalpy of -40.1 kJ/mol and is indicative of physisorbed CO2. The calorimetric data confirm the presence of at least two energetically distinct binding sites for chemisorbed CO2 on CD-MOF-2. |
