Nanocrystalline boron-doped diamond as a corrosion-resistant anode for water oxidation via Si photoelectrodes

0493543 - FZÚ 2019 RIV US eng J - Journal Article
Ashcheulov, Petr - Taylor, Andrew - Mortet, Vincent - Poruba, A. - Le Formal, F. - Krýsová, Hana - Klementová, Mariana - Hubík, Pavel - Kopeček, Jaromír - Lorinčík, J. - Yum, J. H. - Kratochvílová, Irena - Kavan, Ladislav - Sivula, K.
Nanocrystalline boron-doped diamond as a corrosion-resistant anode for water oxidation via Si photoelectrodes.
ACS Applied Materials and Interfaces. Roč. 10, č. 35 (2018), s. 29552-29564. ISSN 1944-8244. E-ISSN 1944-8252
R&D Projects: GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088
Grant - others:FUNBIO(XE) CZ.2.16/3.1.00/21568
Institutional support: RVO:68378271 ; RVO:61388955
Keywords : nanocrystalline diamond * photoanode * protective coating * silicon photoelectrodes * transparent conductive film * water splitting
OECD category: Condensed matter physics (including formerly solid state physics, supercond.); Physical chemistry (UFCH-W)
Impact factor: 8.456, year: 2018

Due to its high sensitivity to corrosion, the use of Si in direct photoelectrochemical water splitting systems that convert solar energy into chemical fuels has been greatly limited.Therefore, the development of low-cost materials resistant to corrosion under oxidizing conditions is an important goal towards a suitable protection of otherwise unstable semiconductors used in photoelectrochemical cells. Here we report on the development of a protective coating based on thin and electrically conductive nanocrystalline boron-doped diamond (BDD) layers. We found that BDD layers protect the underlying Si photoelectrodes over a wide pH range (1-14) in aqueous electrolyte solutions. BDD layer maintains an efficient charge carrier transfer from the underlying silicon to the electrolyte solution.
Permanent Link: http://hdl.handle.net/11104/0286891