Nanoporous silver for electrocatalysis application in alkaline fuel cells

Daria Barsuk, Anicet Zadick, Marian Chatenet, Konstantinos Georgarakis, Nikolaos T. Panagiotopoulos, Yannick Champion, Alberto Moreira Jorge

    Research output: Contribution to journalArticle

    18 Citations (Scopus)

    Abstract

    Self-supporting porous silver foils with an average pore size < 100 nm were produced from a crystalline silver-based ternary alloy as a precursor by removing second phases present in the silver matrix. The final Ag-based porous foil shows good mechanical properties when comparing to its previous amorphous analogues. Its activity for direct electrochemical oxidation of ammonia-borane (AB), a fuel of interest for direct liquid fuel cells, has been investigated in alkaline media. The material exhibits promising electrochemical properties in long-term operation; indeed, material composition and nanostructure remain similar after 15,000 cyclic-voltammetries between − 0.3 and 0.5 V vs. RHE in a 0.1 M NaOH + 5 mM AB solution thermostated at 25 °C. Nanoporous materials, and in particular nanoporous silver, can therefore represent a relevant choice as anode in direct ammonia-borane fuel cell.

    Original languageEnglish
    Pages (from-to)528-536
    Number of pages9
    JournalMaterials and Design
    Volume111
    DOIs
    Publication statusPublished - 2016 Dec 5

    Keywords

    • Ammonia-borane
    • Dealloying
    • Electrooxidation
    • Fuel cell
    • Nanoporous
    • Silver alloys

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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  • Cite this

    Barsuk, D., Zadick, A., Chatenet, M., Georgarakis, K., Panagiotopoulos, N. T., Champion, Y., & Moreira Jorge, A. (2016). Nanoporous silver for electrocatalysis application in alkaline fuel cells. Materials and Design, 111, 528-536. https://doi.org/10.1016/j.matdes.2016.09.037