Photo-assisted electrodeposition of MoS:X from ionic liquids on organic-functionalized silicon photoelectrodes for H2 generation

Daniel W. Redman, Hark Jin Kim, Keith J. Stevenson, Michael J. Rose

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    This work reports on the synergistic utility of ionic liquid-based, photo-assisted electrodeposition of MoSx onto organic-functionalized silicon photolelectrodes for dihydrogen (H2) evolution under 1-sun illumination. The surface linker 3,5-dimethoxyphenyl covalently attached to Si(111) enhances conductivity at the substrate-electrolyte interface (impedance spectroscopy) and provides improved physico-chemical support for MoSx deposition (SEM, Raman, PEC-deposition, XPS), to generate a functional composite device that results in 0.33% efficiency for solar → H2 conversion. We report a new method of ionic liquid-based MoSx deposition that avoids complications in analogous aqueous procedures and facilitates the deposition of a uniform catalytic film. This work provides a generalized framework for the optimization of non-platinum catalysts for solar → H2 conversion.

    Original languageEnglish
    Pages (from-to)7027-7035
    Number of pages9
    JournalJournal of Materials Chemistry A
    Volume4
    Issue number18
    DOIs
    Publication statusPublished - 2016

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