Heat of Adsorption of Propyne on Cu(111) from Isotherms Measured by Reflection Absorption Infrared Spectroscopy

Heat of Adsorption of Propyne on Cu(111) from Isotherms Measured by Reflection Absorption Infrared Spectroscopy
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反射吸收红外光谱测定等温线中丙炔对 Cu(111) 的吸附热

DOI:
10.1021/acs.jpcc.1c06750
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发表时间:
2021
期刊:
The Journal of Physical Chemistry C
影响因子:
--
通讯作者:
Trenary, Michael
Trenary, Michael
中科院分区:
--
文献类型:
--
作者:
Islam, Arephin;Abdel-Rahman, Mohammed K.;Trenary, Michael

文献摘要

参考文献

相似文献

反射吸收红外光谱(RAIRS)表明,在5-100 nTorr的压力下,丙炔在室温下可逆地吸附在Cu(111)表面。基于rirs峰面积,发现丙炔覆盖的压力依赖性遵循Langmuir等温线。根据等温线的拟合,确定了在300.0 ~ 307.5 K范围内吸附的平衡常数。根据平衡常数温度依赖性的范霍夫图,测定了吸附热为- 120±27 kJ mol - 1,吸附熵变为- 171±88 J mol - 1。这些值与同类系统的相应文献值一致。
Reflection absorption infrared spectroscopy (RAIRS) has been used to show that under pressures of 5–100 nTorr, propyne adsorbs reversibly at room temperature on the Cu(111) surface. The pressure dependence of the propyne coverage, based on RAIRS peak areas, was found to follow a Langmuir isotherm. From fits of the isotherms, the equilibrium constants for the adsorption were determined at temperatures from 300.0 to 307.5 K. From van’t Hoff plots of the temperature dependence of the equilibrium constant, a heat of adsorption of −120 ± 27 kJ mol–1and an entropy change of adsorption of −171 ± 88 J mol–1K–1were determined. These values are consistent with the corresponding literature values of similar systems.
丙炔在 Cu(111) 上的红外光谱的理论解释
DOI: --
发表时间: 2004
期刊:
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A. Valcárcel;J. Ricart;F. Illas;A. Clotet
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