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A million-channel CO-PrOx microreactor on a fingertip for fuel cell application
dc.contributor.author | Llorca Piqué, Jordi |
dc.contributor.author | Rosell, O. |
dc.contributor.author | Divins, N.J. |
dc.contributor.author | López, E. |
dc.contributor.author | Roig Costa, Maria |
dc.contributor.author | Todorov Trifonov, Trifon |
dc.contributor.author | Rodríguez Martínez, Ángel |
dc.contributor.author | González de Rivera, F. |
dc.contributor.author | Rodríguez, L.I. |
dc.contributor.author | Seco, M. |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica |
dc.contributor.other | Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques |
dc.date.accessioned | 2011-03-21T10:12:50Z |
dc.date.available | 2011-03-21T10:12:50Z |
dc.date.created | 2010 |
dc.date.issued | 2010 |
dc.identifier.citation | Divins, N. [et al.]. A million-channel CO-PrOx microreactor on a fingertip for fuel cell application. "Chemical engineering journal", 2010, p. 1-6. |
dc.identifier.issn | 1385-8947 |
dc.identifier.uri | http://hdl.handle.net/2117/11980 |
dc.description.abstract | A silicon micromonolith containing ca.40000 regular channels of 3.3 μm in diameter per square millimeter has been successfully functionalized with anAu/TiO2 catalyst for CO preferential oxidation(CO-PrOx) in the presence of hydrogen. The functionalization of the silicon microchannels has been accomplished by growing a SiO2 layer on the channel walls, followed by exchange with a titanium alkoxy deprecursor and decomposition intoTiO2 and, finally, by anchoring carbosilanethiol dendron protected pre-formed Au nanoparticles. Catalytically active centers at the Au–TiO2 interface have been obtained by thermal activation. With this method, an excellent homogeneity and adherence of the catalytic layer over the microchannels of the silicon micromonolith has been obtained, resulting in geometric exposed surface area values of about 4×105m2/m3. The functionalized silicon micromonolith has been tested forCO- PrOx at 363–433 Kand = 2 under H2/CO =0–20 (molar), and the results have been compared with those obtained over a conventional cordierite monolith with 400 cpsi loaded with the same catalyst. The performance of the silicon micromonolith, which converts ca. 1 NmL of CO per minute and mL of microreactor at 398 K under H2/CO ~20, is two orders of magnitude higher than that of conventional monolithic structures, suggesting that silicon micromonoliths could be particularly effective for hydrogen purification in low-temperature microfuel cells for portable applications. |
dc.format.extent | 6 p. |
dc.language.iso | eng |
dc.subject | Àrees temàtiques de la UPC::Enginyeria química |
dc.subject.lcsh | Hydrogen -- Purification |
dc.subject.lcsh | CO-PrOx |
dc.subject.lcsh | Macroporous silicon |
dc.subject.lcsh | Microreactor |
dc.subject.lcsh | Gold catalyst |
dc.subject.lcsh | PEMFC |
dc.title | A million-channel CO-PrOx microreactor on a fingertip for fuel cell application |
dc.type | Article |
dc.contributor.group | Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies |
dc.identifier.doi | 10.1016/j.cej.2010.07.072 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://www.elsevier.com/locate/cej |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 5334598 |
dc.description.version | Postprint (published version) |
local.citation.author | Divins, N.; López, E.; Roig, M.; Todorov, T.; Rodriguez, A.; González de Rivera, F.; Rodríguez, L.; Seco, M.; Rosell, O.; Llorca, J. |
local.citation.publicationName | Chemical engineering journal |
local.citation.startingPage | 1 |
local.citation.endingPage | 6 |
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