PHOTOELECTROCHEMICAL REDUCTION OF NITRATE IONS ON POROUS SILICON AND DIFFERENT SILICON MODIFIED ELECTRODES

We examined the reduction reaction of nitrate ions on different electrode systems: silicon monocrystalline («-type and p-type), porous silicon, and silicon modified by electrodeposited metallic rhenium. In a first stage, voltammetric analysis in different HF media was performed. With this technique...

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Autores principales:	MUÑOZ,E. C, HEYSER,C. A, SCHREBLER,R. S, HENRÍQUEZ,R. G, MAROTTI,R. E
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2011
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072011000300014
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spelling	oai:scielo:S0717-970720110003000142012-01-11PHOTOELECTROCHEMICAL REDUCTION OF NITRATE IONS ON POROUS SILICON AND DIFFERENT SILICON MODIFIED ELECTRODESMUÑOZ,E. CHEYSER,C. ASCHREBLER,R. SHENRÍQUEZ,R. GMAROTTI,R. EWe examined the reduction reaction of nitrate ions on different electrode systems: silicon monocrystalline («-type and p-type), porous silicon, and silicon modified by electrodeposited metallic rhenium. In a first stage, voltammetric analysis in different HF media was performed. With this technique it was possible to establish the different processes associated to porous silicon formation. The morphology of the porous silicon was studied using AFM. Voltammetric analysis was then performed using different silicon substrates. This was then used to study the electrochemical reduction reaction of nitrate ions. A decrease in the overpotential of the reaction was observed, with a consequent increase in current density when the silicon electrodes were modified by electrodeposited rhenium. Finally, an analysis of the reaction products from the nitrate electroreduction was carried out using photoelectrolysis at controlled potential.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.56 n.3 20112011-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072011000300014en10.4067/S0717-97072011000300014
institution	Scielo Chile
collection	Scielo Chile
language	English
description	We examined the reduction reaction of nitrate ions on different electrode systems: silicon monocrystalline («-type and p-type), porous silicon, and silicon modified by electrodeposited metallic rhenium. In a first stage, voltammetric analysis in different HF media was performed. With this technique it was possible to establish the different processes associated to porous silicon formation. The morphology of the porous silicon was studied using AFM. Voltammetric analysis was then performed using different silicon substrates. This was then used to study the electrochemical reduction reaction of nitrate ions. A decrease in the overpotential of the reaction was observed, with a consequent increase in current density when the silicon electrodes were modified by electrodeposited rhenium. Finally, an analysis of the reaction products from the nitrate electroreduction was carried out using photoelectrolysis at controlled potential.
author	MUÑOZ,E. C HEYSER,C. A SCHREBLER,R. S HENRÍQUEZ,R. G MAROTTI,R. E
spellingShingle	MUÑOZ,E. C HEYSER,C. A SCHREBLER,R. S HENRÍQUEZ,R. G MAROTTI,R. E PHOTOELECTROCHEMICAL REDUCTION OF NITRATE IONS ON POROUS SILICON AND DIFFERENT SILICON MODIFIED ELECTRODES
author_facet	MUÑOZ,E. C HEYSER,C. A SCHREBLER,R. S HENRÍQUEZ,R. G MAROTTI,R. E
author_sort	MUÑOZ,E. C
title	PHOTOELECTROCHEMICAL REDUCTION OF NITRATE IONS ON POROUS SILICON AND DIFFERENT SILICON MODIFIED ELECTRODES
title_short	PHOTOELECTROCHEMICAL REDUCTION OF NITRATE IONS ON POROUS SILICON AND DIFFERENT SILICON MODIFIED ELECTRODES
title_full	PHOTOELECTROCHEMICAL REDUCTION OF NITRATE IONS ON POROUS SILICON AND DIFFERENT SILICON MODIFIED ELECTRODES
title_fullStr	PHOTOELECTROCHEMICAL REDUCTION OF NITRATE IONS ON POROUS SILICON AND DIFFERENT SILICON MODIFIED ELECTRODES
title_full_unstemmed	PHOTOELECTROCHEMICAL REDUCTION OF NITRATE IONS ON POROUS SILICON AND DIFFERENT SILICON MODIFIED ELECTRODES
title_sort	photoelectrochemical reduction of nitrate ions on porous silicon and different silicon modified electrodes
publisher	Sociedad Chilena de Química
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072011000300014
work_keys_str_mv	AT munozec photoelectrochemicalreductionofnitrateionsonporoussiliconanddifferentsiliconmodifiedelectrodes AT heyserca photoelectrochemicalreductionofnitrateionsonporoussiliconanddifferentsiliconmodifiedelectrodes AT schreblerrs photoelectrochemicalreductionofnitrateionsonporoussiliconanddifferentsiliconmodifiedelectrodes AT henriquezrg photoelectrochemicalreductionofnitrateionsonporoussiliconanddifferentsiliconmodifiedelectrodes AT marottire photoelectrochemicalreductionofnitrateionsonporoussiliconanddifferentsiliconmodifiedelectrodes
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PHOTOELECTROCHEMICAL REDUCTION OF NITRATE IONS ON POROUS SILICON AND DIFFERENT SILICON MODIFIED ELECTRODES

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