Correlation between proton conductivity, thermal stability and structural symmetries in novel HPW-meso-silica nanocomposite membranes and their performance in direct methanol fuel cells
The intrinsic relationship between proton conductivity, thermal stability and structural symmetries of phosphotungstic acid (HPW)-functionalized mesoporous silica (HPW-meso-silica) membrane was investigated with mesoporous silica from 2D hexagonal p6mm, 3D face-centered cubic (Fm¯3m), body-centered...
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| Format: | Journal Article |
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Elsevier B.V
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/17287 |
| _version_ | 1848749425188405248 |
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| author | Zeng, J. Shen, P. Lu, S. Xiang, Y. Li, L. De Marco, Roland Jiang, San Ping |
| author_facet | Zeng, J. Shen, P. Lu, S. Xiang, Y. Li, L. De Marco, Roland Jiang, San Ping |
| author_sort | Zeng, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The intrinsic relationship between proton conductivity, thermal stability and structural symmetries of phosphotungstic acid (HPW)-functionalized mesoporous silica (HPW-meso-silica) membrane was investigated with mesoporous silica from 2D hexagonal p6mm, 3D face-centered cubic (Fm¯3m), body-centered Im¯3m, to cubic bicontinuous Ia¯3d symmetries. HPW-meso-silica nanocomposites with 3D mesostructures display a significantly higher proton conductivity and higher stability as a function of relative humidity in comparison to 2D mesostructures. The best result was obtained with body-centered cubic (Im¯3m)-HPWmeso-silica, showing proton conductivities of 0.061 S cm-1 at 25°C and 0.14 S cm-1 at 150°C, respectively, and an activation energy of 10.0 kJ mol-1. At 150°C, the cell employing a HPW-meso-silica membrane produced a maximum power output of 237 mW cm-2 in a methanol fuel without external humidification. The high proton conductivity and excellent performance of the new methanol fuel cells demonstrate the promise of HPW-meso-silica nanocomposites with 3D mesostructures as a new class of inorganic proton exchange membranes for use in direct methanol fuel cells (DMFCs). |
| first_indexed | 2025-11-14T07:20:44Z |
| format | Journal Article |
| id | curtin-20.500.11937-17287 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:20:44Z |
| publishDate | 2012 |
| publisher | Elsevier B.V |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-172872017-09-13T15:43:05Z Correlation between proton conductivity, thermal stability and structural symmetries in novel HPW-meso-silica nanocomposite membranes and their performance in direct methanol fuel cells Zeng, J. Shen, P. Lu, S. Xiang, Y. Li, L. De Marco, Roland Jiang, San Ping High temperature proton exchange membranes Structural symmetries Mesoporous silica Direct methanol fuel cells Heteropolyacid The intrinsic relationship between proton conductivity, thermal stability and structural symmetries of phosphotungstic acid (HPW)-functionalized mesoporous silica (HPW-meso-silica) membrane was investigated with mesoporous silica from 2D hexagonal p6mm, 3D face-centered cubic (Fm¯3m), body-centered Im¯3m, to cubic bicontinuous Ia¯3d symmetries. HPW-meso-silica nanocomposites with 3D mesostructures display a significantly higher proton conductivity and higher stability as a function of relative humidity in comparison to 2D mesostructures. The best result was obtained with body-centered cubic (Im¯3m)-HPWmeso-silica, showing proton conductivities of 0.061 S cm-1 at 25°C and 0.14 S cm-1 at 150°C, respectively, and an activation energy of 10.0 kJ mol-1. At 150°C, the cell employing a HPW-meso-silica membrane produced a maximum power output of 237 mW cm-2 in a methanol fuel without external humidification. The high proton conductivity and excellent performance of the new methanol fuel cells demonstrate the promise of HPW-meso-silica nanocomposites with 3D mesostructures as a new class of inorganic proton exchange membranes for use in direct methanol fuel cells (DMFCs). 2012 Journal Article http://hdl.handle.net/20.500.11937/17287 10.1016/j.memsci.2012.01.018 Elsevier B.V restricted |
| spellingShingle | High temperature proton exchange membranes Structural symmetries Mesoporous silica Direct methanol fuel cells Heteropolyacid Zeng, J. Shen, P. Lu, S. Xiang, Y. Li, L. De Marco, Roland Jiang, San Ping Correlation between proton conductivity, thermal stability and structural symmetries in novel HPW-meso-silica nanocomposite membranes and their performance in direct methanol fuel cells |
| title | Correlation between proton conductivity, thermal stability and structural symmetries in novel HPW-meso-silica nanocomposite membranes and their performance in direct methanol fuel cells |
| title_full | Correlation between proton conductivity, thermal stability and structural symmetries in novel HPW-meso-silica nanocomposite membranes and their performance in direct methanol fuel cells |
| title_fullStr | Correlation between proton conductivity, thermal stability and structural symmetries in novel HPW-meso-silica nanocomposite membranes and their performance in direct methanol fuel cells |
| title_full_unstemmed | Correlation between proton conductivity, thermal stability and structural symmetries in novel HPW-meso-silica nanocomposite membranes and their performance in direct methanol fuel cells |
| title_short | Correlation between proton conductivity, thermal stability and structural symmetries in novel HPW-meso-silica nanocomposite membranes and their performance in direct methanol fuel cells |
| title_sort | correlation between proton conductivity, thermal stability and structural symmetries in novel hpw-meso-silica nanocomposite membranes and their performance in direct methanol fuel cells |
| topic | High temperature proton exchange membranes Structural symmetries Mesoporous silica Direct methanol fuel cells Heteropolyacid |
| url | http://hdl.handle.net/20.500.11937/17287 |