An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting

Handle URI:
http://hdl.handle.net/10754/623790
Title:
An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting
Authors:
Garcia Esparza, Angel T. ( 0000-0002-4884-171X ) ; Shinagawa, Tatsuya ( 0000-0002-5240-7342 ) ; Ould-Chikh, Samy ( 0000-0002-3486-0944 ) ; Qureshi, Muhammad; Peng, Xuyuan; Wei, Nini; Anjum, Dalaver H.; Clo, Alain M.; Weng, Tsu-Chien; Nordlund, Dennis; Sokaras, Dimosthenis; Kubota, Jun; Domen, Kazunari; Takanabe, Kazuhiro ( 0000-0001-5374-9451 )
Abstract:
For overall water-splitting systems, it is essential to establish O2 -insensitive cathodes that allow cogeneration of H2 and O2 . An acid-tolerant electrocatalyst is described, which employs a Mo-coating on a metal surface to achieve selective H2 evolution in the presence of O2 . In operando X-ray absorption spectroscopy identified reduced Pt covered with an amorphous molybdenum oxyhydroxide hydrate with a local structural order composed of polyanionic trimeric units of molybdenum(IV). The Mo layer likely hinders O2 gas permeation, impeding contact with active Pt. Photocatalytic overall water splitting proceeded using MoOx /Pt/SrTiO3 with inhibited water formation from H2 and O2 , which is the prevailing back reaction on the bare Pt/SrTiO3 photocatalyst. The Mo coating was stable in acidic media for multiple hours of overall water splitting by membraneless electrolysis and photocatalysis.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division; Advanced Nanofabrication and Thin Film Core Lab; Imaging and Characterization Core Lab; Research Computing; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
Citation:
Garcia-Esparza AT, Shinagawa T, Ould-Chikh S, Qureshi M, Peng X, et al. (2017) An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting. Angewandte Chemie International Edition 56: 5780–5784. Available: http://dx.doi.org/10.1002/anie.201701861.
Publisher:
Wiley-Blackwell
Journal:
Angewandte Chemie International Edition
Issue Date:
13-Apr-2017
DOI:
10.1002/anie.201701861; 10.1002/ange.201701861
Type:
Article
ISSN:
1433-7851
Sponsors:
The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). Pavel Afanasiev is kindly acknowledged for sharing reference spectra recorded at the Mo K-edge. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1002/anie.201701861/full
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorGarcia Esparza, Angel T.en
dc.contributor.authorShinagawa, Tatsuyaen
dc.contributor.authorOuld-Chikh, Samyen
dc.contributor.authorQureshi, Muhammaden
dc.contributor.authorPeng, Xuyuanen
dc.contributor.authorWei, Ninien
dc.contributor.authorAnjum, Dalaver H.en
dc.contributor.authorClo, Alain M.en
dc.contributor.authorWeng, Tsu-Chienen
dc.contributor.authorNordlund, Dennisen
dc.contributor.authorSokaras, Dimosthenisen
dc.contributor.authorKubota, Junen
dc.contributor.authorDomen, Kazunarien
dc.contributor.authorTakanabe, Kazuhiroen
dc.date.accessioned2017-05-31T11:23:05Z-
dc.date.available2017-05-31T11:23:05Z-
dc.date.issued2017-04-13en
dc.identifier.citationGarcia-Esparza AT, Shinagawa T, Ould-Chikh S, Qureshi M, Peng X, et al. (2017) An Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splitting. Angewandte Chemie International Edition 56: 5780–5784. Available: http://dx.doi.org/10.1002/anie.201701861.en
dc.identifier.issn1433-7851en
dc.identifier.doi10.1002/anie.201701861en
dc.identifier.doi10.1002/ange.201701861en
dc.identifier.urihttp://hdl.handle.net/10754/623790-
dc.description.abstractFor overall water-splitting systems, it is essential to establish O2 -insensitive cathodes that allow cogeneration of H2 and O2 . An acid-tolerant electrocatalyst is described, which employs a Mo-coating on a metal surface to achieve selective H2 evolution in the presence of O2 . In operando X-ray absorption spectroscopy identified reduced Pt covered with an amorphous molybdenum oxyhydroxide hydrate with a local structural order composed of polyanionic trimeric units of molybdenum(IV). The Mo layer likely hinders O2 gas permeation, impeding contact with active Pt. Photocatalytic overall water splitting proceeded using MoOx /Pt/SrTiO3 with inhibited water formation from H2 and O2 , which is the prevailing back reaction on the bare Pt/SrTiO3 photocatalyst. The Mo coating was stable in acidic media for multiple hours of overall water splitting by membraneless electrolysis and photocatalysis.en
dc.description.sponsorshipThe research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). Pavel Afanasiev is kindly acknowledged for sharing reference spectra recorded at the Mo K-edge. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/anie.201701861/fullen
dc.subjectElectrocatalysisen
dc.subjectphotocatalysisen
dc.subjectWater Splittingen
dc.subjectIn operando Xasen
dc.subjectHydrogen Evolutionen
dc.titleAn Oxygen-Insensitive Hydrogen Evolution Catalyst Coated by a Molybdenum-Based Layer for Overall Water Splittingen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentAdvanced Nanofabrication and Thin Film Core Laben
dc.contributor.departmentImaging and Characterization Core Laben
dc.contributor.departmentResearch Computing; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabiaen
dc.identifier.journalAngewandte Chemie International Editionen
dc.contributor.institutionCenter for High Pressure Science & Technology Advanced Research; 1690 Cailun Rd, Bldg. #6-408, Pudong Shanghai 201203 Chinaen
dc.contributor.institutionStanford Synchrotron Radiation Lightsource; 2575 Sand Hill Road Menlo Park CA 94025 USAen
dc.contributor.institutionDepartment of Chemical Engineering; Fukuoka University; 8-19-1 Nanakuma, Jonan-ku Fukuoka 814-0180 Japanen
dc.contributor.institutionDepartment of Chemical System Engineering; School of Engineering; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japanen
kaust.authorGarcia Esparza, Angel T.en
kaust.authorShinagawa, Tatsuyaen
kaust.authorOuld-Chikh, Samyen
kaust.authorQureshi, Muhammaden
kaust.authorPeng, Xuyuanen
kaust.authorWei, Ninien
kaust.authorAnjum, Dalaver H.en
kaust.authorClo, Alain M.en
kaust.authorTakanabe, Kazuhiroen
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