Photoelectrochemical Hydrogen Production on InP Nanowire Arrays with Molybdenum Sulfide Electrocatalysts

Semiconductor nanowire arrays are expected to be advantageous for photoelectrochemical energy conversion due to their reduced materials consumption. In addition, with the nanowire geometry the length scales for light absorption and carrier separation are decoupled, which should suppress bulk recombi...

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Bibliographic Details
Published in:Nano letters 2014-07, Vol.14 (7), p.3715-3719
Main Authors: Gao, Lu, Cui, Yingchao, Wang, Jia, Cavalli, Alessandro, Standing, Anthony, Vu, Thuy T. T, Verheijen, Marcel A, Haverkort, Jos E. M, Bakkers, Erik P. A. M, Notten, Peter H. L
Format: Article
Language:English
Subjects:
Arrays
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Hydrogen production
Illumination
Indium phosphides
Materials science
Molybdenum sulfides
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanowires
Photocathodes
Physics
Quantum wires
Semiconductors
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Summary:Semiconductor nanowire arrays are expected to be advantageous for photoelectrochemical energy conversion due to their reduced materials consumption. In addition, with the nanowire geometry the length scales for light absorption and carrier separation are decoupled, which should suppress bulk recombination. Here, we use vertically aligned p-type InP nanowire arrays, coated with noble-metal-free MoS3 nanoparticles, as the cathode for photoelectrochemical hydrogen production from water. We demonstrate a photocathode efficiency of 6.4% under Air Mass 1.5G illumination with only 3% of the surface area covered by nanowires.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl404540f