am5b04640_si_001.pdf (1.57 MB)
Boron-Doped Silicon Diatom Frustules as a Photocathode for Water Splitting
journal contribution
posted on 2015-08-12, 00:00 authored by Soundarrajan Chandrasekaran, Thomas J. Macdonald, Andrea R. Gerson, Thomas Nann, Nicolas H. VoelckerAn
effective solar-powered silicon device for hydrogen production
from water splitting is a priority in light of diminishing fossil
fuel vectors. There is increasing demand for nanostructuring in silicon
to improve its antireflective properties for efficient solar energy
conversion. Diatom frustules are naturally occurring biosilica nanostructures
formed by biomineralizing microalgae. Here, we demonstrate magnesiothermic
conversion of boron-doped silica diatom frustules from Aulacoseira sp. into nanostructured silicon with
retention of the original shape. Hydrogen production was achieved
for boron-doped silicon diatom frustules coated with indium phosphide
nanocrystal layers and an iron sulfur carbonyl electrocatalyst.
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Water SplittingAnbiosilica nanostructuresmagnesiothermic conversionantireflective propertiesbiomineralizing microalgaehydrogen productionDiatom frustulesindium phosphide nanocrystal layersenergy conversiondiatomHydrogen productionfuel vectorsAulacoseira spnanostructured siliconiron sulfur carbonyl electrocatalystwater splitting
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