Self-assembly of HPW on Pt/C nanoparticles with enhanced electrocatalysis activity for fuel cell applications
We report here a novel method to immobilize water soluble tungstophosphoric acid (H3PW12O40, HPW) on Pt/C nanoparticles via the electrostatic interaction between the negatively charged HPW and the positively charged functional groups of chitosan which has been attached to Pt/C nanoparticles to provi...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
elsevier
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/18786 |
| _version_ | 1848749845742878720 |
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| author | Wang, D. Lu, S. Xiang, Y. Jiang, San Ping |
| author_facet | Wang, D. Lu, S. Xiang, Y. Jiang, San Ping |
| author_sort | Wang, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We report here a novel method to immobilize water soluble tungstophosphoric acid (H3PW12O40, HPW) on Pt/C nanoparticles via the electrostatic interaction between the negatively charged HPW and the positively charged functional groups of chitosan which has been attached to Pt/C nanoparticles to provide positively charged sites for the self-assembly of HPW. The HPW assembled Pt/C catalysts (donated as Pt/C-chitosan-HPW) were characterized by XRD, FTIR, TGA, zeta potential, and X-ray photoelectron spectroscopy (XPS). The results indicate that HPW assembled on chitosan-functionalized Pt/C is very stable and Pt/C-chitosan-HPW catalyst has a higher utilization efficiency as compared to that of pristine Pt/C catalyst. Electrochemical activity of Pt/C-chitosan-HPW catalysts for methanol oxidation and oxygen reduction reaction (ORR) is significantly higher than that of Pt/C catalysts without assembled HPW. The enhanced electrocatalytic activities of HPW assembled Pt/C catalysts are most likely due to the synergistic effect between assembled HPW and Pt/C nanoparticles and the presence of HPW leads to a downward shift in the d-band center of Pt catalyst and facilitates the oxidative removal of COads poisoning species for methanol oxidation and desorption of Oads species for ORR on Pt catalysts. |
| first_indexed | 2025-11-14T07:27:25Z |
| format | Journal Article |
| id | curtin-20.500.11937-18786 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:27:25Z |
| publishDate | 2011 |
| publisher | elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-187862017-02-28T01:35:08Z Self-assembly of HPW on Pt/C nanoparticles with enhanced electrocatalysis activity for fuel cell applications Wang, D. Lu, S. Xiang, Y. Jiang, San Ping Electrocatalysis Fuel cells Tungstophosphoric acid Immobilization We report here a novel method to immobilize water soluble tungstophosphoric acid (H3PW12O40, HPW) on Pt/C nanoparticles via the electrostatic interaction between the negatively charged HPW and the positively charged functional groups of chitosan which has been attached to Pt/C nanoparticles to provide positively charged sites for the self-assembly of HPW. The HPW assembled Pt/C catalysts (donated as Pt/C-chitosan-HPW) were characterized by XRD, FTIR, TGA, zeta potential, and X-ray photoelectron spectroscopy (XPS). The results indicate that HPW assembled on chitosan-functionalized Pt/C is very stable and Pt/C-chitosan-HPW catalyst has a higher utilization efficiency as compared to that of pristine Pt/C catalyst. Electrochemical activity of Pt/C-chitosan-HPW catalysts for methanol oxidation and oxygen reduction reaction (ORR) is significantly higher than that of Pt/C catalysts without assembled HPW. The enhanced electrocatalytic activities of HPW assembled Pt/C catalysts are most likely due to the synergistic effect between assembled HPW and Pt/C nanoparticles and the presence of HPW leads to a downward shift in the d-band center of Pt catalyst and facilitates the oxidative removal of COads poisoning species for methanol oxidation and desorption of Oads species for ORR on Pt catalysts. 2011 Journal Article http://hdl.handle.net/20.500.11937/18786 elsevier restricted |
| spellingShingle | Electrocatalysis Fuel cells Tungstophosphoric acid Immobilization Wang, D. Lu, S. Xiang, Y. Jiang, San Ping Self-assembly of HPW on Pt/C nanoparticles with enhanced electrocatalysis activity for fuel cell applications |
| title | Self-assembly of HPW on Pt/C nanoparticles with enhanced electrocatalysis activity for fuel cell applications |
| title_full | Self-assembly of HPW on Pt/C nanoparticles with enhanced electrocatalysis activity for fuel cell applications |
| title_fullStr | Self-assembly of HPW on Pt/C nanoparticles with enhanced electrocatalysis activity for fuel cell applications |
| title_full_unstemmed | Self-assembly of HPW on Pt/C nanoparticles with enhanced electrocatalysis activity for fuel cell applications |
| title_short | Self-assembly of HPW on Pt/C nanoparticles with enhanced electrocatalysis activity for fuel cell applications |
| title_sort | self-assembly of hpw on pt/c nanoparticles with enhanced electrocatalysis activity for fuel cell applications |
| topic | Electrocatalysis Fuel cells Tungstophosphoric acid Immobilization |
| url | http://hdl.handle.net/20.500.11937/18786 |