Please use this identifier to cite or link to this item:
https://doi.org/10.1016/j.jpowsour.2008.04.002
DC Field | Value | |
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dc.title | Enhanced Pt utilization in electrocatalysts by covering of colloidal silica nanoparticles | |
dc.contributor.author | Zeng, J. | |
dc.contributor.author | Chen, J. | |
dc.contributor.author | Lee, J.Y. | |
dc.date.accessioned | 2014-06-17T07:40:15Z | |
dc.date.available | 2014-06-17T07:40:15Z | |
dc.date.issued | 2008-10-01 | |
dc.identifier.citation | Zeng, J., Chen, J., Lee, J.Y. (2008-10-01). Enhanced Pt utilization in electrocatalysts by covering of colloidal silica nanoparticles. Journal of Power Sources 184 (2) : 344-347. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jpowsour.2008.04.002 | |
dc.identifier.issn | 03787753 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/63845 | |
dc.description.abstract | This work aims at enhancing Pt utilization in electrocatalysts by covering of preformed silica nanoparticles. Pt/C electrocatalysts were prepared by reductive deposition of Pt by citrate at moderate temperatures on silica nanoparticles with varying atomic silica to Pt ratios (1.7:1 and 3.3:1) to study the effects of silica to Pt ratio. Considerable voidages were created by inter-situated 10-20 nm silica nanoparticles between support carbon particulates to facilitate mass transfer of reactants and products. This particular method of catalyst preparation increases the Pt metal utilization, and generates a large amount of accessible voidage in the interpenetrating particle network of carbon and silica to support the facile transport of reactants and products. Electrochemical hydrogen adsorption/desorption has shown an increase in electrochemically active surface area by this approach. Methanol electro-oxidation was used as a test reaction to evaluate the catalytic activity. It was found that the Pt catalyst modified with silica at silica:Pt = 1.7:1 atomic ratio was more active than a catalyst prepared when silica to Pt ratio increased to 3.3:1. © 2008 Elsevier B.V. All rights reserved. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.jpowsour.2008.04.002 | |
dc.source | Scopus | |
dc.subject | Electrocatalysts | |
dc.subject | Methanol electro-oxidation | |
dc.subject | Pt utilization | |
dc.subject | Silica | |
dc.type | Article | |
dc.contributor.department | CHEMICAL & BIOMOLECULAR ENGINEERING | |
dc.description.doi | 10.1016/j.jpowsour.2008.04.002 | |
dc.description.sourcetitle | Journal of Power Sources | |
dc.description.volume | 184 | |
dc.description.issue | 2 | |
dc.description.page | 344-347 | |
dc.description.coden | JPSOD | |
dc.identifier.isiut | 000259889100003 | |
Appears in Collections: | Staff Publications |
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