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Sb2Se3 Submission no logo.pdf (3.76 MB)

Photocorrosion-Resistant Sb2Se3 Photocathodes with Earth Abundant MoSx Hydrogen Evolution Catalyst

submitted on 07.09.2017, 10:52 and posted on 08.09.2017, 17:01 by David Tilley, Rajiv Ramanujam Prabhakar, Wilman Septina, Sebastian Siol, Thomas Moehl, René Wick-Joliat

The poor stability of high efficiency photoabsorber materials in aqueous media is one factor holding back the realization of photoelectrochemical (PEC) water splitting for large scale, practical solar fuels generation. Here, we demonstrate that highly efficient thin film Sb2Se3–fabricated by a simple, low temperature selenization of electrodeposited Sb–is intrinsically stable towards photocorrosion in strongly acidic media (1 M H2SO4). Coupling with a photoelectrodeposited MoSx hydrogen evolution catalyst gives high photocurrents (5 mA cm-2 at 0 V vs RHE) and high stability without protective layers (10 h with ~20% loss). A low temperature sulfurization of the Sb2Se3-MoSx stack dramatically improved the onset potential, resulting in high photocurrent densities up to 16 mA cm-2 at 0 V vs RHE. The simplicity with which these photocathodes are fabricated, combined with the high photocurrents and stability, make Sb2Se3 a strong candidate for scalable PEC cells.


University of Zurich; Swiss National Science Foundation (AP Energy Grant # PYAPP2 160586); COST project IZCNZ0-174856 C16.0075, in the COST Action MP1407 (e-MINDS)



  • Energy Storage

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University of Zurich



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Declaration of Conflict of Interest



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