Physico-chemical properties of unusual Ga2O3 polymorphs

被引：19

作者：

Penner, Simon ^{[1
]}

Zhuo, Chen ^{[1
]}

Thalinger, Ramona ^{[1
]}

Gruenbacher, Matthias ^{[1
]}

Hejny, Clivia ^{[2
]}

Vanicek, Stefan ^{[3
]}

Noisternig, Michael ^{[4
]}

机构：

[1] Univ Innsbruck, Inst Phys Chem, Innrain 80-82, A-6020 Innsbruck, Austria

[2] Univ Innsbruck, Inst Mineral & Petrog, Innrain 52d, A-6020 Innsbruck, Austria

[3] Univ Innsbruck, Inst Gen & Inorgan Chem, Innrain 80-82, A-6020 Innsbruck, Austria

[4] Univ Innsbruck, Inst Pharmaceut Technol, Innrain 52c-2, A-6020 Innsbruck, Austria

来源：

MONATSHEFTE FUR CHEMIE | 2016年 / 147卷 / 02期

基金：

奥地利科学基金会;

关键词：

Catalysis; Material science; Oxides; Nanostructures; GALLIUM OXIDE POLYMORPHS; DEFECT FORMATION; HYDROGEN; GAMMA-GA2O3; BETA-GA2O3; DEHYDROGENATION; CHEMISORPTION; PRETREATMENT; PERFORMANCE; ALPHA-GA2O3;

D O I：

10.1007/s00706-015-1628-z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A comparative structural and spectroscopic study, combined with reactivity tests in (inverse) water-gas shift and methanol steam reforming reaction, has been performed on various Ga2O3 polymorphs with special focus on delta-Ga2O3 and epsilon-Ga2O3 with the aim of highlighting the eventual intrinsic physico-chemical properties of the latter two. Using this comparative approach, the question whether delta-Ga2O3 in fact is a nanocrystalline modification of epsilon-Ga2O3, a mixture of epsilon-Ga2O3 and beta-Ga2O3, or a single polymorphic form could be answered: especially Raman spectroscopy measurements, alongside reactivity tests, indicate that delta-Ga2O3 exhibits lots of properties of epsilon-Ga2O3. In fact, particularly in Raman measurements it appears as a mixture of epsilon-Ga2O3 and beta-Ga2O3.

引用

页码：289 / 300

页数：12

共 31 条

[1] Orthorhombic In2O3: A Metastable Polymorph of Indium Sesquioxide [J].

Bekheet, Maged F. ;

Schwarz, Marcus R. ;

Lauterbach, Stefan ;

Kleebe, Hans-Joachim ;

Kroll, Peter ;

Riedel, Ralf ;

Gurlo, Aleksander .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2013, 52 (25) :6531-6535

[2] Hydrogen chemisorption on gallium oxide polymorphs [J].

Collins, SE ;

Baltanás, MA ;

Bonivardi, AL .

LANGMUIR, 2005, 21 (03) :962-970

[3]

Dohy D, 1982, J SOLID STATE CHEM, V45, P4524

[4] THE ZIRCONIA-YTTRIA SYSTEM [J].

DUWEZ, P ;

BROWN, FH ;

ODELL, F .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1951, 98 (09) :356-362

[5] Ambient pressure synthesis of corundum-type In2O3 [J].

Epifani, M ;

Siciliano, P ;

Gurlo, A ;

Barsan, N ;

Weimar, U .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (13) :4078-4079

[6] Microwave-assisted synthesis of various gallium oxyhydroxide nanorods and their controllable conversion into different gallium oxide polymorphs [J].

Ge, Suxiang ;

Zhang, Lizhi ;

Jia, Huimin ;

Zheng, Zhi .

JOURNAL OF MATERIALS RESEARCH, 2009, 24 (07) :2268-2275

[7]

Grier D, 1991, ICDD GRANT IN AID 19

[8] Photocatalytic performance of α-, β-, and γ-Ga2O3 for the destruction of volatile aromatic pollutants in air [J].

Hou, Yidong ;

Wu, Ling ;

Wang, Xinchen ;

Ding, Zhengxin ;

Li, Zhaohui ;

Fu, Xianzhi .

JOURNAL OF CATALYSIS, 2007, 250 (01) :12-18

[9] Hydrogen on polycrystalline β-Ga2O3:: Surface chemisorption, defect formation, and reactivity [J].

Jochum, Wilfrid ;

Penner, Simon ;

Foettinger, Karin ;

Kramer, Reinhard ;

Rupprechter, Guenther ;

Kloetzer, Bernhard .

JOURNAL OF CATALYSIS, 2008, 256 (02) :268-277

[10] Defect formation and the water-gas shift reaction on β-Ga2O3 [J].

Jochum, Wilfrid ;

Penner, Simon ;

Kramer, Reinhard ;

Foettinger, Karin ;

Rupprechter, Guenther ;

Kloetzer, Bernhard .

JOURNAL OF CATALYSIS, 2008, 256 (02) :278-286

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