View in EDS

Microstructural refinement of Ni/Ce0.8Gd0.2O2-δ anodes for low-temperature solid oxide fuel cell by wet infiltration loading of PdCl2.

Saved in:
Bibliographic Details
Title: Microstructural refinement of Ni/Ce0.8Gd0.2O2-δ anodes for low-temperature solid oxide fuel cell by wet infiltration loading of PdCl2.
Authors: Torknik, Fatemeh Sadat1,2 fstorknik@gmail.com, Maghsoudipour, Amir1, Keyanpour-Rad, Mansoor1, Gyeong Man Choi2, Sang Ho Oh3, Ga-Young Shin3
Source: Ceramics International. Sep2014, Vol. 40 Issue 8 Part A, p12299-12312. 14p.
Subjects: Nickel alloys, Metal microstructure, Metals at low temperatures, Solid oxide fuel cell electrodes, Symmetry (Physics)
Abstract: Microstructural refinement of Ni/Gd0.2Ce0.8O2-δ (Ni/GDC20) anode by wet-infiltration of PdCl2 precursor was studied to further improve the anodic performance of low temperature solid oxide fuel cell (LT-SOFC). The effect of <1 wt% of Pd loadings on polarization resistance of Ni/GDC cermet anodes for H2 oxidation reaction was examined using symmetric Ni-GDC20|GDC20|Pt electrolyte-supported cells at 400-600 °C. Nanostructure evolution before and after H2 reduction at 600 °C and also after anodic performance test revealed effectiveness of PdO loading content on the nanoparticles architecture, with PdO as the sole Pd-phase after calcination at 600 °C with no residual chloride. In the process of H2 reduction in high loading of PdO (0.26 mg/cm²), a nano-grained network of metallic palladium (Pd0) containing nanopores structure, which resulted from 40% volume deoxidizing shrinkage of PdO, was developed on the anode surface. But, in the case of small loading, PdHx phase indicating of H affinity of palladium and minute amounts of PdO on NiO were detected. The significant decrease of anodic polarization resistance, e.g. ~100 times at 500 °C, on highly Pd-infiltrated anode was accompanied with≤40 nm agglomerates in Pd-nanonetwork and 45% oxidizing of Pd0 to PdO in H2 environment. Detailed anodic impedance analysis and activation energy (Ea) evaluation can be denoted to a balance between the Ea of reaction-limiting step of charge transfer and the Ea of the facilitating step of diffusion/adsorption/dissociation of the arrived O2- species to triple phase boundaries (TPBs). Our findings verified that oxygen spillovering on the Pd0/PdO-pair nanocoating caused by the shift of the TPBs to the nanocoating-pair for H2 oxidation reaction in LT-SOFC. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. 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: 96999618
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Microstructural refinement of Ni/Ce&lt;subscript&gt;0.8&lt;/subscript&gt;Gd&lt;subscript&gt;0.2&lt;/subscript&gt;O&lt;subscript&gt;2-δ &lt;/subscript&gt; anodes for low-temperature solid oxide fuel cell by wet infiltration loading of PdCl&lt;subscript&gt;2&lt;/subscript&gt;.
– Name: Author
  Label: Authors
  Group: Au
  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Torknik%2C+Fatemeh+Sadat%22&quot;&gt;Torknik, Fatemeh Sadat&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt;&lt;i&gt; fstorknik@gmail.com&lt;/i&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Maghsoudipour%2C+Amir%22&quot;&gt;Maghsoudipour, Amir&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Keyanpour-Rad%2C+Mansoor%22&quot;&gt;Keyanpour-Rad, Mansoor&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Gyeong+Man+Choi%22&quot;&gt;Gyeong Man Choi&lt;/searchLink&gt;&lt;relatesTo&gt;2&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Sang+Ho+Oh%22&quot;&gt;Sang Ho Oh&lt;/searchLink&gt;&lt;relatesTo&gt;3&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Ga-Young+Shin%22&quot;&gt;Ga-Young Shin&lt;/searchLink&gt;&lt;relatesTo&gt;3&lt;/relatesTo&gt;
– Name: TitleSource
  Label: Source
  Group: Src
  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Ceramics+International%22&quot;&gt;Ceramics International&lt;/searchLink&gt;. Sep2014, Vol. 40 Issue 8 Part A, p12299-12312. 14p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Nickel+alloys%22&quot;&gt;Nickel alloys&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Metal+microstructure%22&quot;&gt;Metal microstructure&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Metals+at+low+temperatures%22&quot;&gt;Metals at low temperatures&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Solid+oxide+fuel+cell+electrodes%22&quot;&gt;Solid oxide fuel cell electrodes&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Symmetry+%28Physics%29%22&quot;&gt;Symmetry (Physics)&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Microstructural refinement of Ni/Gd0.2Ce0.8O2-&amp;#948 (Ni/GDC20) anode by wet-infiltration of PdCl2 precursor was studied to further improve the anodic performance of low temperature solid oxide fuel cell (LT-SOFC). The effect of &lt;1 wt% of Pd loadings on polarization resistance of Ni/GDC cermet anodes for H2 oxidation reaction was examined using symmetric Ni-GDC20|GDC20|Pt electrolyte-supported cells at 400-600 &#176;C. Nanostructure evolution before and after H2 reduction at 600 &#176;C and also after anodic performance test revealed effectiveness of PdO loading content on the nanoparticles architecture, with PdO as the sole Pd-phase after calcination at 600 &#176;C with no residual chloride. In the process of H2 reduction in high loading of PdO (0.26 mg/cm&#178;), a nano-grained network of metallic palladium (Pd0) containing nanopores structure, which resulted from 40% volume deoxidizing shrinkage of PdO, was developed on the anode surface. But, in the case of small loading, PdHx phase indicating of H affinity of palladium and minute amounts of PdO on NiO were detected. The significant decrease of anodic polarization resistance, e.g. ~100 times at 500 &#176;C, on highly Pd-infiltrated anode was accompanied with≤40 nm agglomerates in Pd-nanonetwork and 45% oxidizing of Pd0 to PdO in H2 environment. Detailed anodic impedance analysis and activation energy (Ea) evaluation can be denoted to a balance between the Ea of reaction-limiting step of charge transfer and the Ea of the facilitating step of diffusion/adsorption/dissociation of the arrived O2- species to triple phase boundaries (TPBs). Our findings verified that oxygen spillovering on the Pd0/PdO-pair nanocoating caused by the shift of the TPBs to the nanocoating-pair for H2 oxidation reaction in LT-SOFC. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: &lt;i&gt;Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder&#39;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.&lt;/i&gt; (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=96999618
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ceramint.2014.04.075
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 12299
    Subjects:
      – SubjectFull: Nickel alloys
        Type: general
      – SubjectFull: Metal microstructure
        Type: general
      – SubjectFull: Metals at low temperatures
        Type: general
      – SubjectFull: Solid oxide fuel cell electrodes
        Type: general
      – SubjectFull: Symmetry (Physics)
        Type: general
    Titles:
      – TitleFull: Microstructural refinement of Ni/Ce0.8Gd0.2O2-δ anodes for low-temperature solid oxide fuel cell by wet infiltration loading of PdCl2.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Torknik, Fatemeh Sadat
      – PersonEntity:
          Name:
            NameFull: Maghsoudipour, Amir
      – PersonEntity:
          Name:
            NameFull: Keyanpour-Rad, Mansoor
      – PersonEntity:
          Name:
            NameFull: Gyeong Man Choi
      – PersonEntity:
          Name:
            NameFull: Sang Ho Oh
      – PersonEntity:
          Name:
            NameFull: Ga-Young Shin
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 09
              Text: Sep2014
              Type: published
              Y: 2014
          Identifiers:
            – Type: issn-print
              Value: 02728842
          Numbering:
            – Type: volume
              Value: 40
            – Type: issue
              Value: 8 Part A
          Titles:
            – TitleFull: Ceramics International
              Type: main
ResultId 1