Issue 18, 2016

Photo-assisted electrodeposition of MoSx from ionic liquids on organic-functionalized silicon photoelectrodes for H2 generation

Abstract

This work reports on the synergistic utility of ionic liquid-based, photo-assisted electrodeposition of MoSx onto organic-functionalized silicon photolelectrodes for dihydrogen (H2) evolution under 1-sun illumination. The surface linker 3,5-dimethoxyphenyl covalently attached to Si(111) enhances conductivity at the substrate|electrolyte interface (impedance spectroscopy) and provides improved physico-chemical support for MoSx deposition (SEM, Raman, PEC-deposition, XPS), to generate a functional composite device that results in 0.33% efficiency for solar → H2 conversion. We report a new method of ionic liquid-based MoSx deposition that avoids complications in analogous aqueous procedures and facilitates the deposition of a uniform catalytic film. This work provides a generalized framework for the optimization of non-platinum catalysts for solar → H2 conversion.

Graphical abstract: Photo-assisted electrodeposition of MoSx from ionic liquids on organic-functionalized silicon photoelectrodes for H2 generation

Supplementary files

Article information

Article type
Paper
Submitted
28 Nov 2015
Accepted
03 Mar 2016
First published
25 Mar 2016

J. Mater. Chem. A, 2016,4, 7027-7035

Author version available

Photo-assisted electrodeposition of MoSx from ionic liquids on organic-functionalized silicon photoelectrodes for H2 generation

D. W. Redman, H. J. Kim, K. J. Stevenson and M. J. Rose, J. Mater. Chem. A, 2016, 4, 7027 DOI: 10.1039/C5TA09684G

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