Skip to content

Research at St Andrews

Electrical reduction of perovskite electrodes for accelerating exsolution of nanoparticles

Research output: Contribution to journalArticle

Author(s)

Merika Chanthanumataporn, Jianing Hui, Xiangling Yue, Katsuyoshi Kakinuma, John T. S. Irvine, Katsunori Hanamura

School/Research organisations

Abstract

Growth of finely dispersed nanocatalysts by exsolution of metal nanoparticles from perovskite oxides under reducing conditions at elevated temperature is a promising approach of producing highly active catalytic materials. An alternative method of exsolution using an applied potential has been recently shown to potentially accelerate the exsolution process of nanoparticles that can be achieved in minutes rather than the hours required in chemical reduction. In the present study, we investigate exsolution of nanoparticles from perovskite oxides of La0.43Ca0.37Ni0.06Ti0.94O3-γ (LCTNi) and La0.43Ca0.37Ni0.03Fe0.03Ti0.94O3-γ (LCTNi-Fe) under applied potentials in carbon dioxide atmosphere. The impedance spectra of single cells measured before and after electrochemical poling at varying voltages showed that the onset of exsolution process occurred at 2 V of potential reduction. An average particle size of the exsolved nanoparticles observed after testing using a scanning electron microscopy was about 30–100 nm. The cells with the reduced electrodes exhibited desirable electrochemical performances not only in pure carbon dioxide (current density of 0.37 A cm−2 for LCTNi and 0.48 A cm−2 for LCTNi-Fe at 1.5 V) but also in dry hydrogen (0.36 W cm−2 for LCTNi and 0.43 W cm−2 for LCTNi-Fe).
Close

Details

Original languageEnglish
Pages (from-to)159-166
Number of pages8
JournalElectrochimica Acta
Volume306
Early online date21 Mar 2019
DOIs
Publication statusPublished - 20 May 2019

    Research areas

  • Perovskite, Exsolution, Potential reduction, CO electrolysis, Solid oxide cells

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Metal-oxide interactions for infiltrated Ni nanoparticles on A-site deficient LaxSr1 − 3x/2TiO3

    Hui, J., Neagu, D., Miller, D. N., Yue, X., Ni, C. & Irvine, J. T. S., Feb 2018, In : Solid State Ionics. 315, p. 126-130 5 p.

    Research output: Contribution to journalArticle

  2. Graphitic-C3N4 coated floating glass beads for photocatalytic destruction of synthetic and natural organic compounds in water under UV light

    Hui, J., Pestana, C. J., Caux, M., Gunaratne, H. Q. N., Edwards, C., Robertson, P. K. J., Lawton, L. A. & Irvine, J. T. S., 28 Sep 2020, In : Journal of Photochemistry and Photobiology A: Chemistry. 405, 112935.

    Research output: Contribution to journalArticle

  3. Photocatalytic removal of the cyanobacterium Microcystis aeruginosa PCC7813 and four microcystins by TiO2 coated porous glass beads with UV-LED irradiation

    Pestana, C. J., Portela Noronha, J., Hui, J., Edwards, C., Gunaratne, H. Q. N., Irvine, J. T. S., Robertson, P. K. J., Capelo-Neto, J. & Lawton, L. A., 25 Nov 2020, In : Science of the Total Environment. 745, 141154.

    Research output: Contribution to journalArticle

  4. A Ce/Ru codoped SrFeO3−δ perovskite for a coke-resistant anode of a symmetrical solid oxide fuel cell

    Li, B., He, S., Li, J., Yue, X., Irvine, J. T. S., Xie, D., Ni, J. & Ni, C., 24 Nov 2020, In : ACS Catalysis. Articles ASAP, p. 14398-14409 12 p.

    Research output: Contribution to journalArticle

  5. ‘All in one’ photo-reactor pod containing TiO2 coated glass beads and LEDs for continuous photocatalytic destruction of cyanotoxins in water

    Gunaratne, N., Pestana, C., Skillen, N., Hui, J., Rajendran, S., Edwards, C., Irvine, J. T. S., Robertson, P. & Lawton, L., Apr 2020, In : Environmental Science: Water Research & Technology. 6, 4, p. 945-950 5 p.

    Research output: Contribution to journalArticle

Related by journal

  1. An FeNbO4-based oxide anode for a solid oxide fuel cell (SOFC)

    Liu, X., Xie, D., Irvine, J. T. S., Ni, J. & Ni, C., 11 Jan 2020, In : Electrochimica Acta. In press, 135692.

    Research output: Contribution to journalArticle

  2. Numerical modeling of nickel-infiltrated gadolinium-doped ceria electrodes reconstructed with focused ion beam tomography

    Kishimoto, M., Lomberg, M., Ruiz-Trejo, E. & Brandon, N. P., 1 Feb 2016, In : Electrochimica Acta. 190, p. 178-185 8 p.

    Research output: Contribution to journalArticle

  3. Improvement of the electrochemical properties of novel solid oxide fuel cell anodes, La0.75Sr0.25Cr0.5Mn0.5O3−δ and La4Sr8Ti11Mn0.5Ga0.5O37.5−δ, using Cu–YSZ-based cermets

    Núñez, P., Ruiz-Morales, JC., Canales-Vázquez, J., Marrero-López, D. & Irvine, J. T. S., Sep 2007, In : Electrochimica Acta. 52, p. 7217-7225 9 p.

    Research output: Contribution to journalArticle

  4. Electrical conductivity and redox stability of La2Mo2-xWxO9 materials

    Marrero-Lopez, D., Canales-Vazquez, J., Ruiz-Morales, J. C., Irvine, J. T. S. & Nunez, R., 10 Aug 2005, In : Electrochimica Acta. 50, p. 4385-4395 11 p.

    Research output: Contribution to journalArticle

ID: 258296760

Top