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dc.contributor.authorMajeed, I.
dc.contributor.authorNadeem, M.Amtiaz
dc.contributor.authorAl-Oufi, M.
dc.contributor.authorNadeem, M.Arif
dc.contributor.authorWaterhouse, G.I.N.
dc.contributor.authorBadshah, A.
dc.contributor.authorMetson, J.B.
dc.contributor.authorIdriss, H.
dc.date.accessioned2016-02-25T13:20:31Z
dc.date.available2016-02-25T13:20:31Z
dc.date.issued2015-09-25
dc.identifier.citationOn the role of metal particle size and surface coverage for photo-catalytic hydrogen production; a case study of the Au/CdS system 2015 Applied Catalysis B: Environmental
dc.identifier.issn09263373
dc.identifier.doi10.1016/j.apcatb.2015.09.039
dc.identifier.urihttp://hdl.handle.net/10754/598426
dc.description.abstractPhoto-catalytic hydrogen production has been studied on Au supported CdS catalysts under visible light irradiation in order to understand the effect of Au particle size as well as the reaction medium properties. Au nanoparticles of size about 2-5 nm were deposited over hexagonal CdS particles using a new simple method involving reduction of Au3+ ions with iodide ions. Within the investigated range of Au (between 1 and 5 wt. %) fresh particles with mean size of 4 nm and XPS Au4f/Cd3d surface ratio of 0.07 showed the highest performance (ca. 1 molecule of H2 / Auatom s−1) under visible light irradiation (>420 nm and a flux of 35 mW/cm2). The highest hydrogen production rate was obtained from water (92%)-ethanol (8%) in an electrolyte medium (Na2S-Na2SO3). TEM studies of fresh and used catalysts showed that Au particle size increases (almost 5 fold) with increasing photo-irradiation time due to photo-agglomeration effect yet no sign of deactivation was observed. A mechanism for hydrogen production from ethanol-water electrolyte mixture is presented and discussed.
dc.language.isoen
dc.publisherElsevier BV
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0926337315301636
dc.subjectAu-CdS
dc.subjectPhoto-catalytic hydrogen production
dc.subjectMetal particle agglomeration
dc.subjectVisible light irradiation
dc.subjectEthanol-water splitting
dc.titleOn the role of metal particle size and surface coverage for photo-catalytic hydrogen production; a case study of the Au/CdS system
dc.typeArticle
dc.contributor.departmentSABIC - Corporate Research and Innovation Center (CRI) at KAUST
dc.identifier.journalApplied Catalysis B: Environmental
dc.contributor.institutionDepartment of Chemistry and Department of Environmental Sciences, Quid-i-Azam University, Islamabad 4200, Pakistan
dc.contributor.institutionSchool of Chemical Sciences, University of Auckland, Private Bag 92019 Auckland, New Zealand
dc.contributor.institutionDepartment of Chemistry, University College London, London WC1H 0AJ, UK
kaust.personNadeem, M. Amtiaz
kaust.personAl-Oufi, M.
kaust.personIdriss, H.
dc.date.published-online2015-09-25
dc.date.published-print2016-03


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