Spatioselective Deposition of Passivating and Electrocatalytic Layers on Silicon Nanowire Arrays.

ABSTRACT: Metal-silicon nanowire array photoelectrodes provide a promising architecture for water-splitting because they can afford high catalyst loading and decouple charge separation from the light absorption process. To further improve and understand these hybrid nanowire photoelectrodes, control of the catalyst amount and location within the wire array is required. Such a level of control is currently synthetically challenging to achieve. Here, we report the synthesis of cm²-sized hybrid silicon nanowire arrays with electrocatalytically active Ni-Mo and Pt patches placed at defined vertical locations within the individual nanowires. Our method is based on a modified three-dimensional electrochemical axial lithography (3DEAL), which combines metal-assisted chemical etching (MACE) to pr

SUBMITTER: Wendisch FJ 

PROVIDER: S-EPMC7705884 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature