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    Hierarchically ordered porous Ni-based cathode-supported solid oxide electrolysis cells for stable CO2 electrolysis without safe gas

    Access Status
    Fulltext not available
    Authors
    Dong, Dehua
    Xu, S.
    Shao, Xin
    Hucker, L.
    Marin, J.
    Pham, T.
    Xie, K.
    Ye, Z.
    Yang, P.
    Yu, L.
    Parkinson, G.
    Li, Chun-Zhu
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Dong, D. and Xu, S. and Shao, X. and Hucker, L. and Marin, J. and Pham, T. and Xie, K. et al. 2017. Hierarchically ordered porous Ni-based cathode-supported solid oxide electrolysis cells for stable CO2 electrolysis without safe gas. Journal of Materials Chemistry A. 5 (46): pp. 24098-24102.
    Source Title
    Journal of Materials Chemistry A
    DOI
    10.1039/c7ta06839e
    ISSN
    2050-7488
    School
    School of Electrical Engineering, Computing and Mathematical Science (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP160104720
    URI
    http://hdl.handle.net/20.500.11937/60035
    Collection
    • Curtin Research Publications
    Abstract

    This study reported a hierarchically ordered porous Ni-based cathode of a solid oxide electrolysis cell to realise stable CO 2 electrolysis without the need of safe gas. The Ni/(Y 2 O 3 ) 0.08 (ZrO 2 ) 0.92 (YSZ) cathode support has a microchannel structure, which enabled efficient catalyst delivery to the reaction zone between the cathode and the electrolyte and resulted in facilitated gas diffusion through straight channels instead of the tortuous pores intrinsic to conventional porous electrodes. A catalyst network covering a Ni/YSZ scaffold reduced electrode polarisation resistance, prevented carbon formation and suppressed Ni oxidation. The facilitated gas diffusion diminished or eliminated concentration polarisation and carbon formation due to CO accumulation in the reaction zone. The novel hierarchical structure enables stable CO 2 electrolysis over conventional Ni-based cathodes with low capital and operational costs.

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