Open top anodic Ta3N5 nanotubes for higher solar water splitting efficiency

Sabina Grigorescu; Seulgi So; Jeong Eun Yoo; Anca Mazare; Robert Hahn; Patrik Schmuki

doi:10.1016/j.electacta.2015.09.159

Open top anodic Ta3N5 nanotubes for higher solar water splitting efficiency

Materials Science 2016-10-18 v1

Authors: Sabina Grigorescu , Seulgi So , Jeong Eun Yoo , Anca Mazare , Robert Hahn , Patrik Schmuki

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Abstract

In the present work we grow self-organized Ta2O5 nanotube layers in a H2SO4/NH4F electrolyte at various elevated temperatures. Under optimized conditions we obtain 4 {\mu}m long nanotubes that are well adherent to the substrate and can be grown very homogenous over large surface areas. Moreover, the key advantage of this approach is that an open top morphology (initiation layer free) is obtained. After a suitable conversion treatment in NH3 atmosphere Ta3N5 nanotubes are obtained, that after (Co-Pi+Co(OH)x) modification provide, under AM 1.5G illumination conditions, a photoelectrochemical current response of 4.7 mA cm-2 at 1.23 V vs RHE.

Keywords

Ta3N5 nanotubes open top morphology anodic growth solar water splitting photoelectrochemical response Ta2O5 nanotube Co-Pi modification

Cite

@article{arxiv.1610.05179,
  title  = {Open top anodic Ta3N5 nanotubes for higher solar water splitting efficiency},
  author = {Sabina Grigorescu and Seulgi So and Jeong Eun Yoo and Anca Mazare and Robert Hahn and Patrik Schmuki},
  journal= {arXiv preprint arXiv:1610.05179},
  year   = {2016}
}

Open top anodic Ta3N5 nanotubes for higher solar water splitting efficiency

Abstract

Keywords

Cite

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