Photoelectrochemical Hydrogen Generation by an [FeFe] Hydrogenase Active Site Mimic at a p-Type Silicon/Molecular Electrocatalyst Junction

Authors

  • Bhupendra Kumar,

    1. Materials Science and Engineering Program & Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive MC 0358, La Jolla, CA 92093 (USA), Fax: (+1) 858-534-5383
    Search for more papers by this author
  • Dr. Maryline Beyler,

    1. Department of Photochemistry and Molecular Science, Uppsala University, Box 523, 751 20 Uppsala (Sweden), Fax: (+46) 18-471-6844
    Search for more papers by this author
  • Prof. Dr. Clifford P. Kubiak,

    Corresponding author
    1. Materials Science and Engineering Program & Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive MC 0358, La Jolla, CA 92093 (USA), Fax: (+1) 858-534-5383
    • Materials Science and Engineering Program & Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive MC 0358, La Jolla, CA 92093 (USA), Fax: (+1) 858-534-5383
    Search for more papers by this author
  • Dr. Sascha Ott

    Corresponding author
    1. Department of Photochemistry and Molecular Science, Uppsala University, Box 523, 751 20 Uppsala (Sweden), Fax: (+46) 18-471-6844
    • Department of Photochemistry and Molecular Science, Uppsala University, Box 523, 751 20 Uppsala (Sweden), Fax: (+46) 18-471-6844
    Search for more papers by this author

Abstract

original image

Let there be light! A dithiolate-bridged [FeFe] complex with structural features of the [FeFe] hydrogenase active site has been photoelectrochemically reduced by a p-type Si photocathode at a potential 500 mV less negative compared with a glassy carbon electrode (see figure). In the presence of HClO4, hydrogen generation has been achieved at a photovoltage of 600 mV with a (105±5) % Faradaic efficiency.

Ancillary