TY - CHAP
T1 - Nanostructured TiO2-Based Hydrogen Evolution Reaction (HER) Electrocatalysts
T2 - A Preliminary Feasibility Study in Electrodialytic Remediation with Hydrogen Recovery
AU - Rubino, Antonio
AU - Almeida, Joana
AU - Magro, Catia
AU - Schiavi, Pier G.
AU - Guedes, Paula
AU - Couto, Nazare
AU - Mateus, Eduardo P.
AU - Altimari, Pietro
AU - Astolfi, Maria L.
AU - Zanoni, Robertino
AU - Ribeiro, Alexandra B.
AU - Pagnanelli, Francesca
N1 - Publisher Copyright:
© 2021 by John Wiley & Sons Ltd. All rights reserved.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - The use of electrodialytic (ED) technology in soil remediation is to date primarily limited by energy costs related to the stirring and the potentiostat power supply. Considering that during ED process water splitting reactions are the main electrodic reactions involved, one of the strategies to minimize ED energy costs is based on the by-produced hydrogen recovery and reuse (as energy vector) in tandem connected power production units (e.g. fuel cells). From this perspective, using effective electrocatalysts would further boost energy savings by minimizing overpotentials required to sustain the electrolysis. To this purpose, the present study investigated the possibility of employing non-noble-metal-based electrodes as effective hydrogen evolution reaction (HER) electrocatalysts. Specifically, TiO2 nanotubes (NTs) based electrodes have been synthesized and characterized in comparison with commercial electrodes generally employed in ED processes (i.e. Ti/MMO (mixed metals oxides) electrodes). The preliminary characterization evidenced as greater hydrogen production has been achieved using TiO2 NTs based electrode (as cathodes) rather than the commercial one. Furthermore, considering the remediation/recovery targets of the ED tests performed, employing the TiO2 NTs based electrode higher extraction yields for W and Sn were observed, while comparable yields with the commercial electrode were observed for As and Cu.
AB - The use of electrodialytic (ED) technology in soil remediation is to date primarily limited by energy costs related to the stirring and the potentiostat power supply. Considering that during ED process water splitting reactions are the main electrodic reactions involved, one of the strategies to minimize ED energy costs is based on the by-produced hydrogen recovery and reuse (as energy vector) in tandem connected power production units (e.g. fuel cells). From this perspective, using effective electrocatalysts would further boost energy savings by minimizing overpotentials required to sustain the electrolysis. To this purpose, the present study investigated the possibility of employing non-noble-metal-based electrodes as effective hydrogen evolution reaction (HER) electrocatalysts. Specifically, TiO2 nanotubes (NTs) based electrodes have been synthesized and characterized in comparison with commercial electrodes generally employed in ED processes (i.e. Ti/MMO (mixed metals oxides) electrodes). The preliminary characterization evidenced as greater hydrogen production has been achieved using TiO2 NTs based electrode (as cathodes) rather than the commercial one. Furthermore, considering the remediation/recovery targets of the ED tests performed, employing the TiO2 NTs based electrode higher extraction yields for W and Sn were observed, while comparable yields with the commercial electrode were observed for As and Cu.
UR - http://www.scopus.com/inward/record.url?scp=85152835954&partnerID=8YFLogxK
U2 - 10.1002/9781119670186.ch10
DO - 10.1002/9781119670186.ch10
M3 - Chapter
AN - SCOPUS:85152835954
SN - 9781119670117
SP - 227
EP - 249
BT - Electrokinetic Remediation for Environmental Security and Sustainability
PB - wiley
ER -
