Exclusive Hydrogen Generation by Electrocatalysts Coated with an Amorphous Chromium-Based Layer Achieving Efficient Overall Water Splitting

Handle URI:
http://hdl.handle.net/10754/625383
Title:
Exclusive Hydrogen Generation by Electrocatalysts Coated with an Amorphous Chromium-Based Layer Achieving Efficient Overall Water Splitting
Authors:
Qureshi, Muhammad; Shinagawa, Tatsuya ( 0000-0002-5240-7342 ) ; Tsiapis, Nikolaos; Takanabe, Kazuhiro ( 0000-0001-5374-9451 )
Abstract:
Successful 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.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division
Citation:
Qureshi 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.
Publisher:
American Chemical Society (ACS)
Journal:
ACS Sustainable Chemistry & Engineering
Issue Date:
8-Aug-2017
DOI:
10.1021/acssuschemeng.7b01704
Type:
Article
ISSN:
2168-0485; 2168-0485
Sponsors:
The 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.
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acssuschemeng.7b01704
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorQureshi, Muhammaden
dc.contributor.authorShinagawa, Tatsuyaen
dc.contributor.authorTsiapis, Nikolaosen
dc.contributor.authorTakanabe, Kazuhiroen
dc.date.accessioned2017-08-23T11:54:06Z-
dc.date.available2017-08-23T11:54:06Z-
dc.date.issued2017-08-08en
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.en
dc.identifier.issn2168-0485en
dc.identifier.issn2168-0485en
dc.identifier.doi10.1021/acssuschemeng.7b01704en
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.en
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.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acssuschemeng.7b01704en
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.en
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.htmlen
dc.subjectCarbon monoxideen
dc.subjectElectrocatalysisen
dc.subjectFerricyanideen
dc.subjectIodateen
dc.subjectMembraneen
dc.subjectPeroxideen
dc.subjectPersulfateen
dc.subjectPhotocatalysisen
dc.titleExclusive Hydrogen Generation by Electrocatalysts Coated with an Amorphous Chromium-Based Layer Achieving Efficient Overall Water Splittingen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalACS Sustainable Chemistry & Engineeringen
dc.eprint.versionPublisher's Version/PDFen
kaust.authorQureshi, Muhammaden
kaust.authorShinagawa, Tatsuyaen
kaust.authorTsiapis, Nikolaosen
kaust.authorTakanabe, Kazuhiroen
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