PEM Electrolysis-Assisted Catalysis Combined with Photocatalytic Oxidation towards Complete Abatement of Nitrogen-Containing Contaminants in Water

Jordi Ampurdanés; Sorin Bunea; Atsushi Urakawa

doi:10.1002/cssc.202002828

PEM Electrolysis-Assisted Catalysis Combined with Photocatalytic Oxidation towards Complete Abatement of Nitrogen-Containing Contaminants in Water

Jordi Ampurdanés, Sorin Bunea, Atsushi Urakawa^*

^*Corresponding author for this work

ChemE/Catalysis Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

2 Citations (Scopus)

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Abstract

Electrolysis-assisted nitrate (NO₃⁻) reduction is a promising approach for its conversion to harmless N₂ from waste, ground, and drinking water due to the possible process simplicity by in-situ generation of H₂/H/H⁺ by water electrolysis and to the flexibility given by tunable redox potential of electrodes. This work explores the use of a polymer electrolyte membrane (PEM) electrochemical cell for electrolysis-assisted nitrate reduction using SnO₂-supported metals as the active cathode catalysts. Effects of operation modes and catalyst materials on nitrate conversion and product selectivity were studied. The major challenge of product selectivity, namely complete suppression of nitrite (NO₂⁻) and ammonium (NH₄⁺) ion formation, was tackled by combining with simultaneous photocatalytic oxidation to drive the overall reaction towards N₂ formation.

Original language	English
Pages (from-to)	1534-1544
Number of pages	11
Journal	ChemSusChem
Volume	14
Issue number	6
DOIs	https://doi.org/10.1002/cssc.202002828
Publication status	Published - 2020

Keywords

hydrogenation
nitrate removal
oxidation
PEM electrolysis
photocatalysis

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cssc.202002828Final published version, 1.43 MBLicence: CC BY

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title = "PEM Electrolysis-Assisted Catalysis Combined with Photocatalytic Oxidation towards Complete Abatement of Nitrogen-Containing Contaminants in Water",

abstract = "Electrolysis-assisted nitrate (NO3−) reduction is a promising approach for its conversion to harmless N2 from waste, ground, and drinking water due to the possible process simplicity by in-situ generation of H2/H/H+ by water electrolysis and to the flexibility given by tunable redox potential of electrodes. This work explores the use of a polymer electrolyte membrane (PEM) electrochemical cell for electrolysis-assisted nitrate reduction using SnO2-supported metals as the active cathode catalysts. Effects of operation modes and catalyst materials on nitrate conversion and product selectivity were studied. The major challenge of product selectivity, namely complete suppression of nitrite (NO2−) and ammonium (NH4+) ion formation, was tackled by combining with simultaneous photocatalytic oxidation to drive the overall reaction towards N2 formation.",

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T1 - PEM Electrolysis-Assisted Catalysis Combined with Photocatalytic Oxidation towards Complete Abatement of Nitrogen-Containing Contaminants in Water

AU - Ampurdanés, Jordi

AU - Bunea, Sorin

AU - Urakawa, Atsushi

PY - 2020

Y1 - 2020

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AB - Electrolysis-assisted nitrate (NO3−) reduction is a promising approach for its conversion to harmless N2 from waste, ground, and drinking water due to the possible process simplicity by in-situ generation of H2/H/H+ by water electrolysis and to the flexibility given by tunable redox potential of electrodes. This work explores the use of a polymer electrolyte membrane (PEM) electrochemical cell for electrolysis-assisted nitrate reduction using SnO2-supported metals as the active cathode catalysts. Effects of operation modes and catalyst materials on nitrate conversion and product selectivity were studied. The major challenge of product selectivity, namely complete suppression of nitrite (NO2−) and ammonium (NH4+) ion formation, was tackled by combining with simultaneous photocatalytic oxidation to drive the overall reaction towards N2 formation.

KW - hydrogenation

KW - nitrate removal

KW - oxidation

KW - PEM electrolysis

KW - photocatalysis

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M3 - Article

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ER -

PEM Electrolysis-Assisted Catalysis Combined with Photocatalytic Oxidation towards Complete Abatement of Nitrogen-Containing Contaminants in Water

Abstract

Keywords

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