A noble-metal-free hydrogen evolution catalyst grafted to visible light-absorbing semiconductors

Gary F. Moore, Ian D. Sharp

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

We report a method for facile connection of a nickel bisdiphosphine-based functional mimic of the active site of hydrogenase to photocathodes that are relevant to artificial photosynthesis. This procedure exploits the UV-induced immobilization chemistry of alkenes to gallium phosphide and silicon surfaces. The photochemical grafting provides a means for patterning molecular linkers with attachment points to catalysts. Successful grafting is characterized by grazing angle attenuated total reflection Fourier transform infrared spectroscopy (GATR-FTIR), which shows catalyst vibrational modes, as well as X-ray photoelectron spectroscopy (XPS), which confirms the presence of intact Ni complex on the surface. The modular nature of this approach allows independent modification of the light absorber, bridging material, anchoring functionality, or catalyst as new materials and discoveries emerge.

Original languageEnglish (US)
Pages (from-to)568-572
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume4
Issue number4
DOIs
StatePublished - Feb 21 2013
Externally publishedYes

Keywords

  • artificial photosynthesis
  • interfaces
  • semiconductor
  • solar fuels
  • surface

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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