Ordered mesoporous WO3-x Possessing electronically conductive framework comparable to carbon framework toward long-term stable cathode supports for fuel cells
SCIE
SCOPUS
- Title
- Ordered mesoporous WO3-x Possessing electronically conductive framework comparable to carbon framework toward long-term stable cathode supports for fuel cells
- Authors
- Eunae Kang; An, S; Yoon, S; Kim, JK; Lee, J
- Date Issued
- 2010-08
- Publisher
- The Royal Society of Chemistry
- Abstract
- We report on the successful synthesis of ordered mesoporous WO3-X with a high conductivity comparable to a mesoporous carbon framework. Ordered mesoporous WO3-X was prepared using KIT-6 as a hard template. Some WO3-X particles have negative replica structures of KIT-6 template and the other particles are generated by asymmetric incorporation of phosphotungstic acid inside channels of KIT-6 template. The wall of this mesostructured WO3-X has a single crystalline structure, which might be responsible for its high conductivity (1.76 S cm(-1)) comparable to ordered mesoporous carbons (3.0 S cm(-1)). Pt/mesoporous WO3-X exhibits a significant tolerance to cycling between 0.6 and 1.3 V-NHE in 0.5 M H2SO4 solution, preserving 87% of its initial electrochemical surface area (ECSA) after 1000 cycles. On the contrary, the ECSA of the Pt/C decreased significantly with the number of cycles, resulting in loss of 74% of its initial ECSA.
- Keywords
- PLATINUM NANOPARTICLES; OXYGEN REDUCTION; RECENT PROGRESS; METAL-OXIDES; NANOWIRES; ELECTROCATALYSTS; FABRICATION; NANOTUBES; SILICA; CATALYSTS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25824
- DOI
- 10.1039/c0jm00227e
- ISSN
- 0959-9428
- Article Type
- Article
- Citation
- JOURNAL OF MATERIALS CHEMISTRY, vol. 20, no. 35, page. 7416 - 7421, 2010-08
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