| DOI | Resolve DOI: https://doi.org/10.1021/am300002j |
|---|
| Author | Search for: Chevallier, L.; Search for: Bauer, A.1; Search for: Cavaliere, S.; Search for: Hui, R.1; Search for: Rozière, J.; Search for: Jones, D.J. |
|---|
| Affiliation | - National Research Council of Canada. NRC Institute for Fuel Cell Innovation
|
|---|
| Format | Text, Article |
|---|
| Subject | Doped titania; Electroactive; Electrocatalyst support; High specific surface area; High stability; Inorganic components; Ionic interaction; Mass activity; Mesoporous; Mesoporous shell; Microwave methods; Nano-structured; Oxygen reduction reaction; PEM fuel cell; Porosity gradients; Pt particle; Supported Pt; Templating method; TiO; Uniform dispersions; Voltammetric cycles; Cathodes; Cyclic voltammetry; Electrocatalysts; Electrolytic reduction; Mesoporous materials; Microspheres; Platinum; Proton exchange membrane fuel cells (PEMFC); Titanium dioxide |
|---|
| Abstract | Crystalline microspheres of Nb-doped TiO 2 with a high specific surface area were synthesized using a templating method exploiting ionic interactions between nascent inorganic components and an ionomer template. The microspheres exhibit a porosity gradient, with a meso-macroporous kernel, and a mesoporous shell. The material has been investigated as cathode electrocatalyst support for polymer electrolyte membrane (PEM) fuel cells. A uniform dispersion of Pt particles on the Nb-doped TiO 2 support was obtained using a microwave method, and the electrochemical properties assessed by cyclic voltammetry. Nb-TiO 2 supported Pt demonstrated very high stability, as after 1000 voltammetric cycles, 85% of the electroactive Pt area remained compared to 47% in the case of commercial Pt on carbon. For the oxygen reduction reaction (ORR), which takes place at the cathode, the highest stability was again obtained with the Nb-doped titania-based material even though the mass activity calculated at 0.9 V vs RHE was slightly lower. The microspherical structured and mesoporous Nb-doped TiO 2 is an alternative support to carbon for PEM fuel cells. © 2012 American Chemical Society. |
|---|
| Publication date | 2012 |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| NPARC number | 21269276 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | fdcb8e37-7c4f-4cd4-8545-8048bf9bb858 |
|---|
| Record created | 2013-12-12 |
|---|
| Record modified | 2020-04-21 |
|---|
