Development of adiabatic calorimetry system for enthalpy of gas absorption/adsorption and its application to H2/D2 absorption into palladium nanoparticles

被引：5

作者：

Akiba, Hiroshi ^{[1
]}

Hashimoto, Naoki ^{[1
]}

Kofu, Maiko ^{[1
,3
]}

Kobayashi, Hirokazu ^{[2
]}

Kitagawa, Hiroshi ^{[2
]}

Yamamuro, Osamu ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, 5-1-5 Kashiwartoha, Kashiwa, Chiba 2778581, Japan

[2] Kyoto Univ, Grad Sch Sci, Dept Chem, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto 6068502, Japan

[3] J PARC Ctr, Mat & Life Sci Div, Tokai, Ibaraki 3191195, Japan

来源：

THERMOCHIMICA ACTA | 2018年 / 670卷

基金：

日本科学技术振兴机构;

关键词：

Adiabatic calorimetry; Enthalpy of hydrogen absorption; Pd nanoparticle; Isotope effect; THERMODYNAMIC PROPERTIES; HYDROGEN; ADSORPTION; HEATS; TRANSITION; DEUTERIUM; ENERGIES; NITROGEN; SITES; ARGON;

D O I：

10.1016/j.tca.2018.10.013

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

We have developed a new adiabatic calorimetry system for enthalpy of gas absorption/adsorption process. The sample cell is designed to be extremely small as a calorimeter cell with a resistance thermometer; mass: 4.34 g, inner volume: 1.06 cc. A thin stainless steel tube is connected at the lid of the cell to introduce a gas. A gas handling system was also constructed to introduce a gas slowly and measure the amounts of the absorbed/adsorbed gas precisely via a pVT method. As the first work on this system, we measured the enthalpies of H-2/D-2 absorption into Pd nanoparticles with an average diameter of ca. 8 nm. The obtained values are Delta H-abs (H) = -(18.15 +/- 0.87) kJmol(-1) and Delta absH(D) = -(18.17 +/- 0.38) kJmol(-1) at 298 K. These values are considerably smaller than those of bulk Pd. The isotope effect are discussed semi-quantitatively on the basis of the potential energy surfaces at the H/D sites.

引用

页码：87 / 91

页数：5

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