Evaluating surface protonic transport on cerium oxide via electrochemical impedance spectroscopy measurement

Ryo Manabe, Sindre Østby Stub, Truls Norby, Yasushi Sekine

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Surface protonic transport on cerium oxide (CeO2) was investigated using electrochemical impedance spectroscopy (EIS). CeO2 pellets showing low relative density: approximately 60%, was prepared for the purpose. The structure and morphology of the prepared CeO2 pellets were confirmed from XRD and SEM measurements. Results show that the pellets had a pure cubic phase, with open pores on which water can be adsorbed. Electrochemical impedance spectroscopy measurements were taken to evaluate the surface protonic transport on CeO2 as a function of temperature and as a function of partial pressure of water (PH2O) at 400 °C. Investigations of the temperature dependence of the conductivity revealed that only the conductivities of surface grain bulk (σintra) and surface grain boundary (σinter) increased with decreasing temperatures under wet conditions (PH2O = 0.026 atm). The PH2O dependence of surface conductivities (σintra and σinter) revealed that σintra increases strongly with PH2O at 400 °C. These findings provide evidence that water adsorbates play an important role in surface protonic transport on CeO2 at low temperatures. Surface protonic transport at low temperatures can contribute to the expansion of applications for electrical and catalytic processes.

    Original languageEnglish
    Pages (from-to)45-49
    Number of pages5
    JournalSolid State Communications
    Volume270
    DOIs
    Publication statusPublished - 2018 Feb 1

    Fingerprint

    cerium oxides
    Cerium
    Electrochemical impedance spectroscopy
    impedance
    Oxides
    spectroscopy
    pellets
    conductivity
    Water
    Temperature
    water
    Adsorbates
    ceric oxide
    Partial pressure
    partial pressure
    Grain boundaries
    grain boundaries
    porosity
    temperature dependence
    Scanning electron microscopy

    Keywords

    • A. Cerium oxide
    • B. Low relative density
    • D. Surface protonics
    • E. AC impedance measurement

    ASJC Scopus subject areas

    • Chemistry(all)
    • Condensed Matter Physics
    • Materials Chemistry

    Cite this

    Evaluating surface protonic transport on cerium oxide via electrochemical impedance spectroscopy measurement. / Manabe, Ryo; Stub, Sindre Østby; Norby, Truls; Sekine, Yasushi.

    In: Solid State Communications, Vol. 270, 01.02.2018, p. 45-49.

    Research output: Contribution to journalArticle

    @article{821cdeea2fba4f4eb4f8d9ab77af995f,
    title = "Evaluating surface protonic transport on cerium oxide via electrochemical impedance spectroscopy measurement",
    abstract = "Surface protonic transport on cerium oxide (CeO2) was investigated using electrochemical impedance spectroscopy (EIS). CeO2 pellets showing low relative density: approximately 60{\%}, was prepared for the purpose. The structure and morphology of the prepared CeO2 pellets were confirmed from XRD and SEM measurements. Results show that the pellets had a pure cubic phase, with open pores on which water can be adsorbed. Electrochemical impedance spectroscopy measurements were taken to evaluate the surface protonic transport on CeO2 as a function of temperature and as a function of partial pressure of water (PH2O) at 400 °C. Investigations of the temperature dependence of the conductivity revealed that only the conductivities of surface grain bulk (σintra) and surface grain boundary (σinter) increased with decreasing temperatures under wet conditions (PH2O = 0.026 atm). The PH2O dependence of surface conductivities (σintra and σinter) revealed that σintra increases strongly with PH2O at 400 °C. These findings provide evidence that water adsorbates play an important role in surface protonic transport on CeO2 at low temperatures. Surface protonic transport at low temperatures can contribute to the expansion of applications for electrical and catalytic processes.",
    keywords = "A. Cerium oxide, B. Low relative density, D. Surface protonics, E. AC impedance measurement",
    author = "Ryo Manabe and Stub, {Sindre {\O}stby} and Truls Norby and Yasushi Sekine",
    year = "2018",
    month = "2",
    day = "1",
    doi = "10.1016/j.ssc.2017.11.010",
    language = "English",
    volume = "270",
    pages = "45--49",
    journal = "Solid State Communications",
    issn = "0038-1098",
    publisher = "Elsevier Limited",

    }

    TY - JOUR

    T1 - Evaluating surface protonic transport on cerium oxide via electrochemical impedance spectroscopy measurement

    AU - Manabe, Ryo

    AU - Stub, Sindre Østby

    AU - Norby, Truls

    AU - Sekine, Yasushi

    PY - 2018/2/1

    Y1 - 2018/2/1

    N2 - Surface protonic transport on cerium oxide (CeO2) was investigated using electrochemical impedance spectroscopy (EIS). CeO2 pellets showing low relative density: approximately 60%, was prepared for the purpose. The structure and morphology of the prepared CeO2 pellets were confirmed from XRD and SEM measurements. Results show that the pellets had a pure cubic phase, with open pores on which water can be adsorbed. Electrochemical impedance spectroscopy measurements were taken to evaluate the surface protonic transport on CeO2 as a function of temperature and as a function of partial pressure of water (PH2O) at 400 °C. Investigations of the temperature dependence of the conductivity revealed that only the conductivities of surface grain bulk (σintra) and surface grain boundary (σinter) increased with decreasing temperatures under wet conditions (PH2O = 0.026 atm). The PH2O dependence of surface conductivities (σintra and σinter) revealed that σintra increases strongly with PH2O at 400 °C. These findings provide evidence that water adsorbates play an important role in surface protonic transport on CeO2 at low temperatures. Surface protonic transport at low temperatures can contribute to the expansion of applications for electrical and catalytic processes.

    AB - Surface protonic transport on cerium oxide (CeO2) was investigated using electrochemical impedance spectroscopy (EIS). CeO2 pellets showing low relative density: approximately 60%, was prepared for the purpose. The structure and morphology of the prepared CeO2 pellets were confirmed from XRD and SEM measurements. Results show that the pellets had a pure cubic phase, with open pores on which water can be adsorbed. Electrochemical impedance spectroscopy measurements were taken to evaluate the surface protonic transport on CeO2 as a function of temperature and as a function of partial pressure of water (PH2O) at 400 °C. Investigations of the temperature dependence of the conductivity revealed that only the conductivities of surface grain bulk (σintra) and surface grain boundary (σinter) increased with decreasing temperatures under wet conditions (PH2O = 0.026 atm). The PH2O dependence of surface conductivities (σintra and σinter) revealed that σintra increases strongly with PH2O at 400 °C. These findings provide evidence that water adsorbates play an important role in surface protonic transport on CeO2 at low temperatures. Surface protonic transport at low temperatures can contribute to the expansion of applications for electrical and catalytic processes.

    KW - A. Cerium oxide

    KW - B. Low relative density

    KW - D. Surface protonics

    KW - E. AC impedance measurement

    UR - http://www.scopus.com/inward/record.url?scp=85035071784&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85035071784&partnerID=8YFLogxK

    U2 - 10.1016/j.ssc.2017.11.010

    DO - 10.1016/j.ssc.2017.11.010

    M3 - Article

    VL - 270

    SP - 45

    EP - 49

    JO - Solid State Communications

    JF - Solid State Communications

    SN - 0038-1098

    ER -