In Situ X-ray Diffraction Studies on the De/rehydrogenation Processes of the K2[Zn(NH2)4]-8LiH System

被引：9

作者：

Cao, Hujun ^{[1
]}

Pistidda, Claudio ^{[1
]}

Richter, Theresia M. M. ^{[2
]}

Santoru, Antonio ^{[1
]}

Milanese, Chiara ^{[3
]}

Garroni, Sebastiano ^{[4
]}

Bednarcik, Jozef ^{[5
]}

Chaudhary, Anna-Lisa ^{[1
]}

Gizer, Goekhan ^{[1
]}

Liermann, Hanns-Peter ^{[5
]}

Niewa, Rainer ^{[2
]}

Ping, Chen ^{[6
]}

Klassen, Thomas ^{[1
]}

Dornheim, Martin ^{[1
]}

机构：

[1] Helmholtz Zentrum Geesthacht GmbH, Inst Mat Res, Mat Technol, Max Planck Str 1, D-21502 Geesthacht, Germany

[2] Univ Stuttgart, Inst Inorgan Chem, Pfaffenwaldring 55, D-70569 Stuttgart, Germany

[3] Univ Pavia, Dept Chem, Chem Phys Sect, Pavia Lab H2, VialeTaramelli 16, I-27100 Pavia, Italy

[4] INSTM, Dept Chem & Pharm, Via Vienna 2, I-07100 Sassari, Italy

[5] Helmholtz Assoc, Deutsch Elektronen Synchrotron Res Ctr, Notkestr 85, D-22607 Hamburg, Germany

[6] Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2017年 / 121卷 / 03期

关键词：

HYDROGEN STORAGE MATERIALS; N-H SYSTEM; METAL-HYDRIDES; THERMODYNAMIC PROPERTIES; DEHYDROGENATION/HYDROGENATION; PERFORMANCE; LINH2-MGH2; DESORPTION; KINETICS; CATALYST;

D O I：

10.1021/acs.jpcc.6b12095

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, the hydrogen absorption and desorption properties of the system K-2[Zn(NH2)(4)]-8LiH are investigated in detail via in situ synchrotron radiation powder X-ray diffraction (SR-PXD), Fourier transform infrared spectroscopy (FT-IR), and volumetric methods. Upon milling, K-2[Zn(NH2)(4)] and 8LiH react to form 4LiNH(2)-4LiH-K2ZnH4, and then 4LiNH(2)-4LiH-K2ZnH4 releases H-2 in multiple steps. The final products of the desorption reaction are KH, LiZn13, and Li2(N)H. During rehydrogenation, KH reacts with LiZn13 under 50 bar of hydrogen producing K3ZnH5. This phase appears to enhance the hydrogenation process which after its formation at ca. 220 degrees C takes place in only 30 s. The system 4LiNH(2)-4LiH-IC2ZnH4 is shown to be reversible under the applied conditions of vacuum at 400 degrees C for desorption and 50 bar of H-2 at 300 degrees C for absorption.

引用

页码：1546 / 1551

页数：6

共 48 条

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