Mechanochemically synthesized cesium-ion-substituted phosphotungstic acid using several types of cesium-containing salts

被引：18

作者：

Daiko, Yusuke ^{[1
]}

Takagi, Hisanori ^{[1
]}

Katagiri, Kiyofumi ^{[2
]}

Muto, Hiroyuki ^{[1
]}

Sakai, Mototsugu ^{[1
]}

Matsuda, Atsunori ^{[1
]}

机构：

[1] Toyohashi Univ Technol, Dept Mat Sci, Tempa Ku, Aichi 4418580, Japan

[2] Nagoya Univ, Grad Sch Engn, Dept Appl Chem, Aichi 4648603, Japan

来源：

SOLID STATE IONICS | 2008年 / 179卷 / 21-26期

关键词：

mechanical milling; proton conductivity; phosphotungstic acid; fuel cell; NMR;

D O I：

10.1016/j.ssi.2008.02.004

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：

Cesium salts of Cs2SO4, Cs2CO3 and CsHSO4 and phosphotungstic acid (H3PW12O40 center dot 6H(2)O:WPA center dot 6H(2)O) were mechanically milled to synthesize chemically durable WPA composites. The X-ray diffraction patterns of composites suggested the formation of partially substituted CsxH3-xPW12O40 composites after milling at 720 rpm for 10 min. Proton conductivities under both humidified and dry conditions of the resultant composites markedly improved. The proton conductivities strongly depended on the type of cesium salt. The hydrogen bonding distance L in the frame structures of the composites was estimated from the H-1-isotropic chemical shift. The proton conductivities in dry conditions of WPA center dot 6H(2)O and the composites were strongly represented to L. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：1174 / 1177

页数：4

共 24 条

[1] Acidity of Keggin-type heteropolycompounds evaluated by catalytic probe reactions, sorption microcalorimetry, and density functional quantum chemical calculations [J].

Bardin, BB ;

Bordawekar, SV ;

Neurock, M ;

Davis, RJ .

JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (52) :10817-10825

[2] WATER IN SILICATE-GLASSES - QUANTITATION AND STRUCTURAL STUDIES BY H-1 SOLID ECHO AND MAS-NMR METHODS [J].

ECKERT, H ;

YESINOWSKI, JP ;

SILVER, LA ;

STOLPER, EM .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (07) :2055-2064

[3] Location of protons in anhydrous Keggin heteropolyacids H3PMo12O40 and H3PW12O40 by 1H{31P}/31P{1H} REDOR NMR and DFT quantum chemical calculations [J].

Ganapathy, S ;

Fournier, M ;

Paul, JF ;

Delevoye, L ;

Guelton, M ;

Amoureux, JP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (26) :7821-7828

[4] High performance fuel cell based on phosphotungstic acid as proton conducting electrolyte [J].

Giordano, N ;

Staiti, P ;

Hocevar, S ;

Arico, AS .

ELECTROCHIMICA ACTA, 1996, 41 (03) :397-403

[5]

Honma I, 2002, FUEL CELLS, V2, P52, DOI 10.1002/1615-6854(20020815)2:1<52::AID-FUCE52>3.0.CO

[6]

2-G

[7] PROTON-MAGIC-ANGLE-SPINNING NMR AND IR-ABSORPTION-SPECTRA OF STRONGLY HYDROGEN-BONDED HYDROXYL-GROUPS IN OXIDE GLASSES [J].

HOSONO, H ;

ABE, Y ;

DEGUCHI, K .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1992, 142 (1-2) :103-107

[8] Anhydrous and water-assisted proton mobility in phosphotungstic acid [J].

Janik, MJ ;

Davis, RJ ;

Neurock, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (14) :5238-5245

[9] SOLID-STATE NMR OF H3PW12O40.NH2O AND H3PW12O40.6C2H5OH [J].

KANDA, Y ;

LEE, KY ;

NAKATA, S ;

ASAOKA, S ;

MISONO, M .

CHEMISTRY LETTERS, 1988, (01) :139-142

[10] Electron polarisation [J].

Keggin, JF .

NATURE, 1933, 131 :908-909

← 1 2 3 →