Mo3S4 Clusters as an Effective H2 Evolution Catalyst on Protected Si Photocathodes

This work shows how a molecular Mo3S4 cluster bonded to a photoelectrode surface via a phosphonate ligand can be a highly effective co-catalyst in photocathodic hydrogen evolution systems. Using a TiO2 protected n+p Si photocathode, H2 evolution occurs with an onset of +0.33 V vs. RHE in an acid sol...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2014-08, Vol.161 (12), p.H722-H724
Main Authors: Seger, Brian, Herbst, Konrad, Pedersen, Thomas, Abrams, Billie, Vesborg, Peter C. K., Hansen, Ole, Chorkendorff, Ib
Format: Article
Language:English
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Summary:This work shows how a molecular Mo3S4 cluster bonded to a photoelectrode surface via a phosphonate ligand can be a highly effective co-catalyst in photocathodic hydrogen evolution systems. Using a TiO2 protected n+p Si photocathode, H2 evolution occurs with an onset of +0.33 V vs. RHE in an acid solution with this precious metal-free system. Using just the red part of the AM1.5 solar spectrum (λ > 635 nm), a saturation current of 20 mA/cm2 is achieved from an electrode containing Mo3S4 dropcasted onto a 100 nm TiO2/7 nm Ti/n+p Si electrode.
ISSN:0013-4651
DOI:10.1149/2.0161412jes