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Article: Photocatalytic reforming of C3-polyols for H 2 production. Part II. FTIR study on the adsorption and photocatalytic reforming reaction of 2-propanol on Pt/TiO 2

TitlePhotocatalytic reforming of C3-polyols for H 2 production. Part II. FTIR study on the adsorption and photocatalytic reforming reaction of 2-propanol on Pt/TiO 2
Authors
Keywords2-Propanol
Adsorption
Ftir Study
Photocatalytic Reforming
Pt/Tio 2
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apcatb
Citation
Applied Catalysis B: Environmental, 2011, v. 106 n. 3-4, p. 689-696 How to Cite?
AbstractThe adsorption behavior and the photocatalytic reforming (PR) process of 2-propanol over Pt (1wt.%)/TiO 2 (PT) photocatalyst have been investigated by Fourier transform infrared (FTIR) spectroscopy. Both the adsorption complexes and the reforming intermediates formed on the PT and the gas-phase were determined and identified by FTIR spectra. The results indicated that the first layer surface of the PT mainly consisted of chemisorbed 2-propanol (Ti-OCH(CH 3) 2) through the condensation of 2-propanol with surface Ti-OH or dissociative adsorption with undercoordinated Ti atoms, while the second layer consisted of physisorbed 2-propanol by interaction with the chemisorbed one or the formed H 2O via hydrogen-bond. Under UV irradiation, a rapidly deprotonation of 2-propoxide occurred by the attack of holes (h +) and resulted in the formation of acetone, which was then slowly oxidized to acetate and formate species by the hydroxyl radicals (OH). The carboxylates finally decarboxylate over the PT to evolve CO 2 and CH 4 via the photo-Kolbe reaction. According to the results, a reforming mechanism was proposed. The role of the OH groups contained in 2-propanol and its intermediates were found to serve as anchors for their adsorption and to involve the formation of h + transport ways. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/157134
ISSN
2015 Impact Factor: 8.328
2015 SCImago Journal Rankings: 2.322
ISI Accession Number ID
Funding AgencyGrant Number
NSFC21003021
20873022
20973071
National High Tech R&D Program of China (863 Program)2008AA06Z326
HKU
Funding Information:

This work was financially supported by the NSFC (grants nos. 21003021, 20873022, and 20973071), the National High Tech R&D Program of China (863 Program, 2008AA06Z326). The authors at the University of Hong Kong (HKU) acknowledge HKU for supporting part of the work in this paper.

References

 

DC FieldValueLanguage
dc.contributor.authorGu, Qen_US
dc.contributor.authorFu, Xen_US
dc.contributor.authorWang, Xen_US
dc.contributor.authorChen, Sen_US
dc.contributor.authorLeung, DYCen_US
dc.contributor.authorXie, Xen_US
dc.date.accessioned2012-08-08T08:45:28Z-
dc.date.available2012-08-08T08:45:28Z-
dc.date.issued2011en_US
dc.identifier.citationApplied Catalysis B: Environmental, 2011, v. 106 n. 3-4, p. 689-696en_US
dc.identifier.issn0926-3373en_US
dc.identifier.urihttp://hdl.handle.net/10722/157134-
dc.description.abstractThe adsorption behavior and the photocatalytic reforming (PR) process of 2-propanol over Pt (1wt.%)/TiO 2 (PT) photocatalyst have been investigated by Fourier transform infrared (FTIR) spectroscopy. Both the adsorption complexes and the reforming intermediates formed on the PT and the gas-phase were determined and identified by FTIR spectra. The results indicated that the first layer surface of the PT mainly consisted of chemisorbed 2-propanol (Ti-OCH(CH 3) 2) through the condensation of 2-propanol with surface Ti-OH or dissociative adsorption with undercoordinated Ti atoms, while the second layer consisted of physisorbed 2-propanol by interaction with the chemisorbed one or the formed H 2O via hydrogen-bond. Under UV irradiation, a rapidly deprotonation of 2-propoxide occurred by the attack of holes (h +) and resulted in the formation of acetone, which was then slowly oxidized to acetate and formate species by the hydroxyl radicals (OH). The carboxylates finally decarboxylate over the PT to evolve CO 2 and CH 4 via the photo-Kolbe reaction. According to the results, a reforming mechanism was proposed. The role of the OH groups contained in 2-propanol and its intermediates were found to serve as anchors for their adsorption and to involve the formation of h + transport ways. © 2011 Elsevier B.V.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apcatben_US
dc.relation.ispartofApplied Catalysis B: Environmentalen_US
dc.subject2-Propanolen_US
dc.subjectAdsorptionen_US
dc.subjectFtir Studyen_US
dc.subjectPhotocatalytic Reformingen_US
dc.subjectPt/Tio 2en_US
dc.titlePhotocatalytic reforming of C3-polyols for H 2 production. Part II. FTIR study on the adsorption and photocatalytic reforming reaction of 2-propanol on Pt/TiO 2en_US
dc.typeArticleen_US
dc.identifier.emailLeung, DYC:ycleung@hku.hken_US
dc.identifier.authorityLeung, DYC=rp00149en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.apcatb.2011.05.046en_US
dc.identifier.scopuseid_2-s2.0-79960834113en_US
dc.identifier.hkuros200083-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79960834113&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume106en_US
dc.identifier.issue3-4en_US
dc.identifier.spage689en_US
dc.identifier.epage696en_US
dc.identifier.isiWOS:000294092400049-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridGu, Q=36910098600en_US
dc.identifier.scopusauthoridFu, X=35214986500en_US
dc.identifier.scopusauthoridWang, X=35276060900en_US
dc.identifier.scopusauthoridChen, S=36727041700en_US
dc.identifier.scopusauthoridLeung, DYC=7203002484en_US
dc.identifier.scopusauthoridXie, X=44561730300en_US

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