Comparing Pt/SrTiO3 to Rh/SrTiO3 for hydrogen photocatalytic production from ethanol

Handle URI:
http://hdl.handle.net/10754/550812
Title:
Comparing Pt/SrTiO3 to Rh/SrTiO3 for hydrogen photocatalytic production from ethanol
Authors:
Wahab, A. K.; Odedairo, T.; Labis, J.; Hedhili, Mohamed N. ( 0000-0002-3624-036X ) ; Delavar, A.; Idriss, H.
Abstract:
Photocatalytic hydrogen production from ethanol as an example of biofuel is studied over 0.5 wt% Rh/SrTiO3 and 0.5 wt% Pt/SrTiO3 perovskite materials. The rate of hydrogen production, rH2, over Pt/SrTiO3 is found to be far higher than that observed over Rh/SrTiO3 (4 × 10−6 mol of H2 g catal. −1 min−1 (1.1 × 10−6 mol of H2 m catal. −2 min−1) compared to 0.7 × 10−6 mol of H2 g catal. −1 min−1 (5.5 × 10−8 mol of H2 m catal. −2 min−1), respectively, under UV excitation with a flux equivalent to that from the sun light (ca. 1 mW cm−2). Analyses of the XPS Rh3d and XPS Pt4f indicate that Rh is mainly present in its ionic form (Rh3+) while Pt is mainly present in its metallic form (Pt0). A fraction of the non-metallic state of Rh in the catalyst persisted even after argon ion sputtering. The tendency of Rh to be oxidized compared to Pt might be the reason behind the lower activity of the former compared to the later. On the contrary, a larger amount of methane are formed on the Rh containing catalyst compared to that observed on the Pt containing catalyst due to the capacity of Rh to break the carbon–carbon bond of the organic compound.
KAUST Department:
Advanced Nanofabrication, Imaging and Characterization Core Lab
Citation:
Comparing Pt/SrTiO3 to Rh/SrTiO3 for hydrogen photocatalytic production from ethanol 2013, 3 (3-4):83 Applied Petrochemical Research
Publisher:
Springer Science + Business Media
Journal:
Applied Petrochemical Research
Issue Date:
13-Aug-2013
DOI:
10.1007/s13203-013-0033-y
Type:
Article
ISSN:
2190-5525; 2190-5533
Additional Links:
http://link.springer.com/10.1007/s13203-013-0033-y
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab

Full metadata record

DC FieldValue Language
dc.contributor.authorWahab, A. K.en
dc.contributor.authorOdedairo, T.en
dc.contributor.authorLabis, J.en
dc.contributor.authorHedhili, Mohamed N.en
dc.contributor.authorDelavar, A.en
dc.contributor.authorIdriss, H.en
dc.date.accessioned2015-04-28T11:17:59Zen
dc.date.available2015-04-28T11:17:59Zen
dc.date.issued2013-08-13en
dc.identifier.citationComparing Pt/SrTiO3 to Rh/SrTiO3 for hydrogen photocatalytic production from ethanol 2013, 3 (3-4):83 Applied Petrochemical Researchen
dc.identifier.issn2190-5525en
dc.identifier.issn2190-5533en
dc.identifier.doi10.1007/s13203-013-0033-yen
dc.identifier.urihttp://hdl.handle.net/10754/550812en
dc.description.abstractPhotocatalytic hydrogen production from ethanol as an example of biofuel is studied over 0.5 wt% Rh/SrTiO3 and 0.5 wt% Pt/SrTiO3 perovskite materials. The rate of hydrogen production, rH2, over Pt/SrTiO3 is found to be far higher than that observed over Rh/SrTiO3 (4 × 10−6 mol of H2 g catal. −1 min−1 (1.1 × 10−6 mol of H2 m catal. −2 min−1) compared to 0.7 × 10−6 mol of H2 g catal. −1 min−1 (5.5 × 10−8 mol of H2 m catal. −2 min−1), respectively, under UV excitation with a flux equivalent to that from the sun light (ca. 1 mW cm−2). Analyses of the XPS Rh3d and XPS Pt4f indicate that Rh is mainly present in its ionic form (Rh3+) while Pt is mainly present in its metallic form (Pt0). A fraction of the non-metallic state of Rh in the catalyst persisted even after argon ion sputtering. The tendency of Rh to be oxidized compared to Pt might be the reason behind the lower activity of the former compared to the later. On the contrary, a larger amount of methane are formed on the Rh containing catalyst compared to that observed on the Pt containing catalyst due to the capacity of Rh to break the carbon–carbon bond of the organic compound.en
dc.publisherSpringer Science + Business Mediaen
dc.relation.urlhttp://link.springer.com/10.1007/s13203-013-0033-yen
dc.rightsThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, dis- tribution, and reproduction in any medium, provided the original author(s) and the source are credited.en
dc.subjectEthanol-photoreactionen
dc.subjectXPS Rh3den
dc.subjectXPS Pt4fen
dc.subjectHydrogen productionen
dc.subjectPerovskite materialsen
dc.subjectBand gapen
dc.subjectSrTiO3en
dc.subjectCarbon–carbon bond dissociationen
dc.titleComparing Pt/SrTiO3 to Rh/SrTiO3 for hydrogen photocatalytic production from ethanolen
dc.typeArticleen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.identifier.journalApplied Petrochemical Researchen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSABIC: T&I Riyadh and CRI-KAUST, Riyadh, Saudi Arabiaen
dc.contributor.institutionKAIN, Riyadh, Saudi Arabiaen
kaust.authorHedhili, Mohamed N.en
kaust.authorDelavar, A.en
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