View in EDS

A spinel ferrite/hercynite water-splitting redox cycle

Saved in:
Bibliographic Details
Title: A spinel ferrite/hercynite water-splitting redox cycle
Authors: Scheffe, Jonathan R.1 jonathan.scheffe@colorado.edu, Li, Jianhua1, Weimer, Alan W. alan.weimer@colorado.edu
Source: International Journal of Hydrogen Energy. Apr2010, Vol. 35 Issue 8, p3333-3340. 8p.
Subjects: Spinel, Oxidation-reduction reaction, Solar thermal energy, Thermodynamics, Ferrites, Aluminum oxide, Hydrogen production, Low temperatures
Abstract: Abstract: Cobalt ferrites are deposited on Al2O3 substrates via atomic layer deposition, and the efficacy of using these in a ferrite water splitting redox cycle to produce H2 is studied. Experimental results are coupled with thermodynamic modeling, and results indicate that CoFe2O4 deposited on Al2O3 is capable of being reduced at lower temperatures than CoFe2O4 (200–300°C) due to a reaction between the ferrite and substrate to form FeAl2O4. Although the reaction of FeAl2O4 and H2O is not as thermodynamically favorable as that of FeO and H2O, it is shown to be capable of splitting H2O to produce H2 if non-equilibrium conditions are maintained. Significant quantities of H2 are produced at reduction temperatures of only 1200°C, whereas, CoFe2O4 produced little or no H2 until reduction temperatures of 1400°C. CoFe2O4/Al2O3 was capable of being cycled at 1200°C reduction/ 1000°C oxidation with no obvious deactivation. [Copyright &y& Elsevier]
Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 49790514
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: A spinel ferrite/hercynite water-splitting redox cycle
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Scheffe%2C+Jonathan+R%2E%22">Scheffe, Jonathan R.</searchLink><relatesTo>1</relatesTo><i> jonathan.scheffe@colorado.edu</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Jianhua%22">Li, Jianhua</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Weimer%2C+Alan+W%2E%22">Weimer, Alan W.</searchLink><i> alan.weimer@colorado.edu</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Apr2010, Vol. 35 Issue 8, p3333-3340. 8p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Spinel%22">Spinel</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation-reduction+reaction%22">Oxidation-reduction reaction</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+thermal+energy%22">Solar thermal energy</searchLink><br /><searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Ferrites%22">Ferrites</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminum+oxide%22">Aluminum oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink><br /><searchLink fieldCode="DE" term="%22Low+temperatures%22">Low temperatures</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: Cobalt ferrites are deposited on Al2O3 substrates via atomic layer deposition, and the efficacy of using these in a ferrite water splitting redox cycle to produce H2 is studied. Experimental results are coupled with thermodynamic modeling, and results indicate that CoFe2O4 deposited on Al2O3 is capable of being reduced at lower temperatures than CoFe2O4 (200–300°C) due to a reaction between the ferrite and substrate to form FeAl2O4. Although the reaction of FeAl2O4 and H2O is not as thermodynamically favorable as that of FeO and H2O, it is shown to be capable of splitting H2O to produce H2 if non-equilibrium conditions are maintained. Significant quantities of H2 are produced at reduction temperatures of only 1200°C, whereas, CoFe2O4 produced little or no H2 until reduction temperatures of 1400°C. CoFe2O4/Al2O3 was capable of being cycled at 1200°C reduction/ 1000°C oxidation with no obvious deactivation. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=49790514
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ijhydene.2010.01.140
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 3333
    Subjects:
      – SubjectFull: Spinel
        Type: general
      – SubjectFull: Oxidation-reduction reaction
        Type: general
      – SubjectFull: Solar thermal energy
        Type: general
      – SubjectFull: Thermodynamics
        Type: general
      – SubjectFull: Ferrites
        Type: general
      – SubjectFull: Aluminum oxide
        Type: general
      – SubjectFull: Hydrogen production
        Type: general
      – SubjectFull: Low temperatures
        Type: general
    Titles:
      – TitleFull: A spinel ferrite/hercynite water-splitting redox cycle
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Scheffe, Jonathan R.
      – PersonEntity:
          Name:
            NameFull: Li, Jianhua
      – PersonEntity:
          Name:
            NameFull: Weimer, Alan W.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 15
              M: 04
              Text: Apr2010
              Type: published
              Y: 2010
          Identifiers:
            – Type: issn-print
              Value: 03603199
          Numbering:
            – Type: volume
              Value: 35
            – Type: issue
              Value: 8
          Titles:
            – TitleFull: International Journal of Hydrogen Energy
              Type: main
ResultId 1