Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass Residues

The increasing production of digestate, a byproduct of anaerobic digestion, requires sustainable valorization strategies for avoiding landfill disposal and constraints in the development of biogas industry. This study explores the synthesis of hydrochars derived from sludge digestate and Phragmites...

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Detalles Bibliográficos
Autores: Ramírez Vidal, Álvaro, Parodi, Nadia Agustina, Martín Ruiz, Fátima, Muñoz Morales, Martín, Llanos López, Javier
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/42990
Acceso en línea:https://doi.org/10.1016/j.electacta.2025.146194
https://hdl.handle.net/10578/42990
Access Level:acceso abierto
Palabra clave:2e-ORR
Circular economy
Digestate
Hydrogen peroxide
Phytomass
Waste valorization
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dc.title.none.fl_str_mv Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass Residues
title Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass Residues
spellingShingle Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass Residues
Ramírez Vidal, Álvaro
2e-ORR
Circular economy
Digestate
Hydrogen peroxide
Phytomass
Waste valorization
title_short Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass Residues
title_full Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass Residues
title_fullStr Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass Residues
title_full_unstemmed Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass Residues
title_sort Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass Residues
dc.creator.none.fl_str_mv Ramírez Vidal, Álvaro
Parodi, Nadia Agustina
Martín Ruiz, Fátima
Muñoz Morales, Martín
Llanos López, Javier
author Ramírez Vidal, Álvaro
author_facet Ramírez Vidal, Álvaro
Parodi, Nadia Agustina
Martín Ruiz, Fátima
Muñoz Morales, Martín
Llanos López, Javier
author_role author
author2 Parodi, Nadia Agustina
Martín Ruiz, Fátima
Muñoz Morales, Martín
Llanos López, Javier
author2_role author
author
author
author
dc.subject.none.fl_str_mv 2e-ORR
Circular economy
Digestate
Hydrogen peroxide
Phytomass
Waste valorization
topic 2e-ORR
Circular economy
Digestate
Hydrogen peroxide
Phytomass
Waste valorization
description The increasing production of digestate, a byproduct of anaerobic digestion, requires sustainable valorization strategies for avoiding landfill disposal and constraints in the development of biogas industry. This study explores the synthesis of hydrochars derived from sludge digestate and Phragmites australis biomass, as well as their 1:1 (w/w) mixture (H1:1) via hydrothermal carbonization (HTC). Furthermore, their subsequent pyrolysis or chemical activation with KOH was also carried out. The primary goal was to investigate the electrocatalytic performance of these materials in the electrochemical H2O2 generation through the two-electron oxygen reduction reaction (2e?ORR). All the synthesized materials underwent comprehensive physicochemical characterization, including ultimate and proximate analysis, N2 adsorption isotherms, TGA, Raman spectroscopy, FTIR spectroscopy and SEM, in order to correlate the properties of novel carbonaceous materials with their electrocatalytic performance.The characterization revealed that the H1:1 sample exhibits an interesting combination of properties, including stability, porosity, the presence of functional groups, and structural defects. Moreover, a significant reduction in functional groups was observed upon hydrochar posttreatments. Electrochemical analysis using linear sweep voltammetry (LSV) demonstrated high current density and a low onset potential for H1:1, correlating with its superior H2O2 production efficiency (100 mg L?¹ at 2 hours), surpassing thermally activated samples (64 and 36 mg L?¹). This performance was attributed to its synergistic composition, carboxylic functional groups, and structural defects, which promote oxygen adsorption and activation. These discoveries showcase the potential of transforming sludge digestate into high-performance cathode materials for sustainable H2O2 production through the cost-effective and scalable HTC technology.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.electacta.2025.146194
https://hdl.handle.net/10578/42990
url https://doi.org/10.1016/j.electacta.2025.146194
https://hdl.handle.net/10578/42990
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv PERGAMON-ELSEVIER SCIENCE LTD
publisher.none.fl_str_mv PERGAMON-ELSEVIER SCIENCE LTD
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Electrochemical Hydrogen Peroxide Generation through Circular Valorization of Waste Biomass: Co-processing Sludge Digestate and Phytomass ResiduesRamírez Vidal, ÁlvaroParodi, Nadia AgustinaMartín Ruiz, FátimaMuñoz Morales, MartínLlanos López, Javier2e-ORRCircular economyDigestateHydrogen peroxidePhytomassWaste valorizationThe increasing production of digestate, a byproduct of anaerobic digestion, requires sustainable valorization strategies for avoiding landfill disposal and constraints in the development of biogas industry. This study explores the synthesis of hydrochars derived from sludge digestate and Phragmites australis biomass, as well as their 1:1 (w/w) mixture (H1:1) via hydrothermal carbonization (HTC). Furthermore, their subsequent pyrolysis or chemical activation with KOH was also carried out. The primary goal was to investigate the electrocatalytic performance of these materials in the electrochemical H2O2 generation through the two-electron oxygen reduction reaction (2e?ORR). All the synthesized materials underwent comprehensive physicochemical characterization, including ultimate and proximate analysis, N2 adsorption isotherms, TGA, Raman spectroscopy, FTIR spectroscopy and SEM, in order to correlate the properties of novel carbonaceous materials with their electrocatalytic performance.The characterization revealed that the H1:1 sample exhibits an interesting combination of properties, including stability, porosity, the presence of functional groups, and structural defects. Moreover, a significant reduction in functional groups was observed upon hydrochar posttreatments. Electrochemical analysis using linear sweep voltammetry (LSV) demonstrated high current density and a low onset potential for H1:1, correlating with its superior H2O2 production efficiency (100 mg L?¹ at 2 hours), surpassing thermally activated samples (64 and 36 mg L?¹). This performance was attributed to its synergistic composition, carboxylic functional groups, and structural defects, which promote oxygen adsorption and activation. These discoveries showcase the potential of transforming sludge digestate into high-performance cathode materials for sustainable H2O2 production through the cost-effective and scalable HTC technology.The increasing production of digestate, a byproduct of anaerobic digestion, requires sustainable valorization strategies for avoiding landfill disposal and constraints in the development of biogas industry. This study explores the synthesis of hydrochars derived from sludge digestate and Phragmites australis biomass, as well as their 1:1 (w/w) mixture (H1:1) via hydrothermal carbonization (HTC). Furthermore, their subsequent pyrolysis or chemical activation with KOH was also carried out. The primary goal was to investigate the electrocatalytic performance of these materials in the electrochemical H2O2 generation through the two-electron oxygen reduction reaction (2e?ORR). All the synthesized materials underwent comprehensive physicochemical characterization, including ultimate and proximate analysis, N2 adsorption isotherms, TGA, Raman spectroscopy, FTIR spectroscopy and SEM, in order to correlate the properties of novel carbonaceous materials with their electrocatalytic performance.The characterization revealed that the H1:1 sample exhibits an interesting combination of properties, including stability, porosity, the presence of functional groups, and structural defects. Moreover, a significant reduction in functional groups was observed upon hydrochar posttreatments. Electrochemical analysis using linear sweep voltammetry (LSV) demonstrated high current density and a low onset potential for H1:1, correlating with its superior H2O2 production efficiency (100 mg L?¹ at 2 hours), surpassing thermally activated samples (64 and 36 mg L?¹). This performance was attributed to its synergistic composition, carboxylic functional groups, and structural defects, which promote oxygen adsorption and activation. These discoveries showcase the potential of transforming sludge digestate into high-performance cathode materials for sustainable H2O2 production through the cost-effective and scalable HTC technology.PERGAMON-ELSEVIER SCIENCE LTD202520252025info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://doi.org/10.1016/j.electacta.2025.146194https://hdl.handle.net/10578/42990reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/429902026-05-27T07:36:41Z
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