Proposed Mechanisms for the Catalytic Activity of Ti in NaAlH4

被引：106

作者：

Frankcombe, Terry J. ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia

来源：

CHEMICAL REVIEWS | 2012年 / 112卷 / 04期

关键词：

REVERSIBLE HYDROGEN STORAGE; DENSITY-FUNCTIONAL THEORY; SODIUM ALUMINUM-HYDRIDE; X-RAY-DIFFRACTION; ZIRCONIUM-DOPED NAALH4; POINT-DEFECT DYNAMICS; TRANSITION-METAL; AB-INITIO; DEHYDROGENATION KINETICS; DESORPTION-KINETICS;

D O I：

10.1021/cr2001838

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A study was conducted to demonstrate titanium (Ti)-based doping in sodium alanate. Proposed mechanisms for Ti catalysis were proposed mechanisms for Ti catalysis in turn. A brief overview of the decomposition of sodium alanate, the nature of the additives investigated for catalyzing hydrogen storage in sodium alanate, and what happened to the Ti on doping into the material was also presented to definitively establish the context for the mechanistic proposals. It was observed that pure unit Ti, improvements in the kinetics of hydrogen release and uptake slowed with increasing amounts of added Ti. This was accompanied by the obvious decrease in the by-weight hydrogen storage capacity of the overall material, meaning that there was an optimum window of a few wt % Ti for mobile hydrogen storage.

引用

页码：2164 / 2178

页数：15

共 192 条

[1] Dehydrogenation kinetics of as-received and ball-milled LiAlH4 [J].

Andreasen, A ;

Vegge, T ;

Pedersen, AS .

JOURNAL OF SOLID STATE CHEMISTRY, 2005, 178 (12) :3672-3678

[2] Hydrogen desorption kinetics in transition metal modified NaAlH4 [J].

Anton, DL .

JOURNAL OF ALLOYS AND COMPOUNDS, 2003, 356 :400-404

[3] Vacancy-mediated hydrogen desorption in NaAlH4 -: art. no. 165101 [J].

Araújo, CM ;

Li, S ;

Ahuja, R ;

Jena, P .

PHYSICAL REVIEW B, 2005, 72 (16)

[4] Role of titanium in hydrogen desorption in crystalline sodium alanate -: art. no. 251913 [J].

Araújo, CM ;

Ahuja, R ;

Guillén, JMO ;

Jena, P .

APPLIED PHYSICS LETTERS, 2005, 86 (25) :1-3

[5] SIMPLE AND COMPLEX METAL-HYDRIDES OF THE MAIN GROUP-METALS - A PERSONAL ACCOUNT OF THE EARLY DAYS [J].

ASHBY, EC .

JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1980, 200 (01) :1-10

[6] Role of Ti in the reversible dehydrogenation of Ti-doped sodium alanate [J].

Bai, Kewu ;

Wu, Ping .

APPLIED PHYSICS LETTERS, 2006, 89 (20)

[7] Reversible Catalytic Reactions and the Stability of Ti Surface Defects in NaAlH4 [J].

Bai, Kewu ;

Yeo, Pei Shan Emmeline ;

Wu, Ping .

CHEMISTRY OF MATERIALS, 2008, 20 (24) :7539-7544

[8] On the local structure of Ti during in situ desorption of Ti(OBu)4 and TiCl3 doped NaAlH4 [J].

Balde, Cornelis P. ;

van der Eerden, Ad M. J. ;

Stil, Hans A. ;

de Groot, Frank M. F. ;

de Jong, Krijn P. ;

Bitter, Johannes H. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 446 :232-236

[9] Active Ti species in TiCl3-doped NaAlH4.: Mechanism for catalyst deactivation [J].

Balde, Cornelis P. ;

Stil, Hans A. ;

van der Eerden, Ad M. J. ;

de Jong, Krijn P. ;

Bitter, Johannes H. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (06) :2797-2802

[10] Rapid solid-state transformation of tetrahedral [AlH4]- into octahedral [AlH6]3- in lithium aluminohydride [J].

Balema, VP ;

Dennis, KW ;

Pecharsky, VK .

CHEMICAL COMMUNICATIONS, 2000, (17) :1665-1666

← 1 2 3 4 5 6 7 8 9 10 →