Cu<inf>2</inf>O decorated with cocatalyst MoS<inf>2</inf>for solar hydrogen production with enhanced efficiency under visible light

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Journal Article
Journal of Physical Chemistry C, 2014, 118 (26), pp. 14238 - 14245
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In this work, we have prepared a p-type semiconductor of Cu 2 O decorated with MoS 2 nanosheets as cocatalyst for efficient solar hydrogen production under visible light. Results show that Cu 2 O decorated with 1.0 wt % MoS 2 presents the maximum reduction photocurrent density of 0.17 mA cm -2 , which is 7-fold higher than pristine Cu 2 O. Furthermore, the as-prepared MoS 2 @Cu 2 O exhibits remarkable photostability with only 7% loss of its original photocurrent after 9 h of continuous work. The excellent performance of MoS 2 @Cu 2 O is ascribed to the introduction of active sites of MoS 2 nanosheets as cocatalyst to the surface of Cu 2 O nanoparticles, which activates the photocatalyst by lowering the electrochemical proton reduction overpotential and also inhibits photoinduced corrosion during the measurement. © 2014 American Chemical Society.
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