Journal of Physical Chemistry C
Journal of Physical Chemistry C
5 years ago

Exceptionally Robust CuInS2/ZnS Nanoparticles as Single Component Photocatalysts for H2 Evolution

Exceptionally Robust CuInS2/ZnS Nanoparticles as Single Component Photocatalysts for H2 Evolution
Wenhui Hu, Yulu Zhou, John Ludwig, Jier Huang
In this work, we report water-soluble CuInS2/ZnS nanoparticles (NPs) as intrinsic single-component photocatlaysts for light-driven hydrogen generation. In the presence of ascorbic acid (AA), this catalyst can efficiently generate H2 from water with an exceptionally long lifetime (≫84 h). Mechanistic insight into the catalysis revealed by transient absorption spectroscopy demonstrates that the catalytic cycle initiates by a reductive quenching process through electron transfer from AA to CuInS2/ZnS NPs, which is followed by a rate limiting step, i.e., proton reduction from electrons in the conduction band/defect states of the CuInS2/ZnS NPs.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b05241

DOI: 10.1021/acs.jpcc.7b05241

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