Área de Química Analíticahttp://hdl.handle.net/10259/38432024-03-19T01:30:52Z2024-03-19T01:30:52ZElectrodeposition of Molybdenum Disulfide (MoS2) Nanoparticles on Monocrystalline SiliconVizza, MartinaGiurlani, WalterCerri, LorenzoCalisi, NicolaAlessio Leonardi, AntonioLo Faro, María JosèIrrera, AlessiaBerretti, EnricoPerales Rondon, Juan VíctorColina Santamaría, ÁlvaroBujedo Saiz, ElenaInnocenti, Massimohttp://hdl.handle.net/10259/75812023-03-23T01:05:27Z2022-08-01T00:00:00ZElectrodeposition of Molybdenum Disulfide (MoS2) Nanoparticles on Monocrystalline Silicon
Vizza, Martina; Giurlani, Walter; Cerri, Lorenzo; Calisi, Nicola; Alessio Leonardi, Antonio; Lo Faro, María Josè; Irrera, Alessia; Berretti, Enrico; Perales Rondon, Juan Víctor; Colina Santamaría, Álvaro; Bujedo Saiz, Elena; Innocenti, Massimo
Molybdenum disulfide (MoS2
) has attracted great attention for its unique chemical and
physical properties. The applications of this transition metal dichalcogenide (TMDC) range from
supercapacitors to dye-sensitized solar cells, Li-ion batteries and catalysis. This work opens new
routes toward the use of electrodeposition as an easy, scalable and cost-effective technique to perform
the coupling of Si with molybdenum disulfide. MoS2 deposits were obtained on n-Si (100) electrodes
by electrochemical deposition protocols working at room temperature and pressure, as opposed to
the traditional vacuum-based techniques. The samples were characterized by X-ray Photoelectron
Spectroscopy (XPS), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and
Rutherford Back Scattering (RBS).
2022-08-01T00:00:00ZMultiamperometric-SERS detection of melamine on gold screen-printed electrodesHernández Muñoz, SheilaGarcía, LydiaPérez Estébanez, MartínCheuquepan Valenzuela, WilliamHeras Vidaurre, AránzazuColina Santamaría, Álvarohttp://hdl.handle.net/10259/74802023-04-17T11:22:49Z2022-08-01T00:00:00ZMultiamperometric-SERS detection of melamine on gold screen-printed electrodes
Hernández Muñoz, Sheila; García, Lydia; Pérez Estébanez, Martín; Cheuquepan Valenzuela, William; Heras Vidaurre, Aránzazu; Colina Santamaría, Álvaro
A new, simple and fast protocol to generate gold-based SERS substrates is presented in this work. Melamine is a
compound widely used in the industry that can be toxic for humans if consumed even in low concentrations.
EC-SERS is an excellent alternative to classical methods to detect and quantify this compound because Raman
spectroscopy provides a fingerprint of the molecules, providing very good sensitivity. In this work, timeresolved Raman spectroelectrochemistry is employed to generate a SERS substrate and to detect melamine,
all in a single experiment. The dynamic character of this technique provides valuable information about the
interaction of the molecule with the generated substrate. An optimization of the spectroelectrochemical
method based on a multi-pulse amperometric detection has been performed. The new protocol presented in
this work shows significant figures of merit in a very short experiment time, just 25 s.
2022-08-01T00:00:00ZRegenerative electrochemical ion pumping cell based on semi-solid electrodes for sustainable Li recoveryPerez Antolin, DanielIrastorza, CristinaGonzález, SaraMoreno, RebecaGarcía-Quismondo, EnriquePalma, JesúsLado, Julio J.Ventosa Arbaizar, Edgarhttp://hdl.handle.net/10259/74792023-04-17T11:18:40Z2022-07-01T00:00:00ZRegenerative electrochemical ion pumping cell based on semi-solid electrodes for sustainable Li recovery
Perez Antolin, Daniel; Irastorza, Cristina; González, Sara; Moreno, Rebeca; García-Quismondo, Enrique; Palma, Jesús; Lado, Julio J.; Ventosa Arbaizar, Edgar
Demand of lithium is expected to increase drastically in coming years driven by the market penetration of electric
vehicles powered by Li-ion batteries, which will require faster and more efficient Li extraction technologies than
conventional ones (evaporation in brines). The Electrochemical Ion Pumping Cell (EIPC) technology based on the
use of Faradaic materials is one of the most promising approaches. However, its relatively short lifespan prevents
its commercial deployment. Herein, a new EIPC concept based on the use of semi-solid electrodes is proposed for
the first time, which takes advantage of the rheological characteristics of semi-solid electrodes that enable simple
and cheap regeneration of the Regenerative Electrochemical Ion Pumping Cell (REIPC) systems after reaching its
end-of-life. A proof-of-concept for REIPC is accomplished by simple replacement of the semi-solid electrode
demonstrating a remarkable electrochemical performance (e.g. 99.87%cycle− 1
, 99.98%h− 1
, 3–4 mAh cm− 2
)
along with a competitive ion separation (e.g. 16.2 mgLi⋅gNiHCF− 1
, 4 gLi m− 2 and 15.6 Wh⋅mol− 1
). The use of semisolid electrode offers other unique features such as a significant cost reduction of 95% for every regeneration
regarding conventional EIPC, proving that REIPC concept successfully addresses the issues associated to the
sustainability and recyclability of the conventional EIPC's for lithium capturing.
2022-07-01T00:00:00ZSemi-flowable Zn semi-solid electrodes as renewable energy carrier for refillable Zn–Air batteriesPerez Antolin, DanielSchuhmann, WolfgangPalma, JesúsVentosa Arbaizar, Edgarhttp://hdl.handle.net/10259/74752023-04-17T10:45:42Z2022-07-01T00:00:00ZSemi-flowable Zn semi-solid electrodes as renewable energy carrier for refillable Zn–Air batteries
Perez Antolin, Daniel; Schuhmann, Wolfgang; Palma, Jesús; Ventosa Arbaizar, Edgar
Today’s society relies on energy storage on a day-to-day basis, e.g. match energy production and demand from renewable sources, power a variety of electronics, and
enable emerging technologies. As a result, a vast range of energy storage technologies has emerged in the last decades. Among them, rechargeable Zn–Air batteries
have held great promises for a long time. However, the severe challenges related to the reversible O2 reactions and poor cyclability at the positive and negative
electrodes, respectively, have severely hindered the success of this technology. Herein, electrically-conducting and semi-flowable Zn semi-solid electrodes are
proposed to revive the appealing concept of a mechanically–rechargeable alkaline Zn–Air battery, in which the spent negative electrodes are easily substituted at the
end of the discharge process (refillable primary battery). In this proof-of-concept study energy densities of ca. 1500 Wh L− 1 (1350 Ah L− 1
electrode and utilization rate of
85%) are achieved thanks to the compromised flowability of the proposed Zn semi-solid electrodes. In this way, semi-solid Zn electrodes become a type of green
energy carrier having intrinsic advantages over gas and liquid fuels. Zn semi-flowable electrode can be generated elsewhere using renewable sources, easily stored,
transported, and used to produce electricity.
2022-07-01T00:00:00Z