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dc.contributor.authorQureshi, Muhammad
dc.contributor.authorShinagawa, Tatsuya
dc.contributor.authorTsiapis, Nikolaos
dc.contributor.authorTakanabe, Kazuhiro
dc.date.accessioned2017-08-23T11:54:06Z
dc.date.available2017-08-23T11:54:06Z
dc.date.issued2017-08-08
dc.identifier.citationQureshi M, Shinagawa T, Tsiapis N, Takanabe K (2017) Exclusive Hydrogen Generation by Electrocatalysts Coated with an Amorphous Chromium-Based Layer Achieving Efficient Overall Water Splitting. ACS Sustainable Chemistry & Engineering. Available: http://dx.doi.org/10.1021/acssuschemeng.7b01704.
dc.identifier.issn2168-0485
dc.identifier.issn2168-0485
dc.identifier.doi10.1021/acssuschemeng.7b01704
dc.identifier.urihttp://hdl.handle.net/10754/625383
dc.description.abstractSuccessful conversion of renewable energy to useful chemicals requires efficient devices that can electrocatalyze or photocatalyze redox reactions, e.g., overall water splitting. Excellent electrocatalysts for the hydrogen evolution reaction (HER), such as Pt, can also cause other side-reactions, including the water-forming back-reaction from H2 and O2 products. A Cr-based amorphous layer coated on catalysts can work as a successful surface modifier that avoids the back-reaction, but its capabilities and limitations toward other species have not been studied. Herein, we investigated the Cr-based layer on Pt from perspectives of both electrocatalysis and photocatalysis using redox-active molecules/ions (O2, ferricyanide, IO3–, S2O82–, H2O2, and CO gas). Our systematic study revealed that utilization of the Cr-based layer realized an exclusive cathodic reaction only to HER, even in the presence of the aforementioned reactive species, suggesting that Cr-based layers work as membranes, as well as corrosion and poison inhibition layers. However, the Cr-based layer experienced self-oxidation and dissolved into the aqueous phase when a strong oxidizing agent or low pH was present. Presented herein are fundamental and critical aspects of the Cr-based modifier, which is essential for the successful and practical development of solar fuel production systems.
dc.description.sponsorshipThe authors thank Dr. Dalaver H. Anjum for the TEM images. The research reported in this work was supported by the King Abdullah University of Science and Technology.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acssuschemeng.7b01704
dc.rightsThis is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License, which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes.
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html
dc.subjectCarbon monoxide
dc.subjectElectrocatalysis
dc.subjectFerricyanide
dc.subjectIodate
dc.subjectMembrane
dc.subjectPeroxide
dc.subjectPersulfate
dc.subjectPhotocatalysis
dc.titleExclusive Hydrogen Generation by Electrocatalysts Coated with an Amorphous Chromium-Based Layer Achieving Efficient Overall Water Splitting
dc.typeArticle
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalACS Sustainable Chemistry & Engineering
dc.eprint.versionPublisher's Version/PDF
kaust.personQureshi, Muhammad
kaust.personShinagawa, Tatsuya
kaust.personTsiapis, Nikolaos
kaust.personTakanabe, Kazuhiro
refterms.dateFOA2018-06-14T05:04:59Z


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