Nanostructured electrodes for hydrogen production in alkaline electrolyzer

Ganci, Fabrizio; Lombardo, S.; Sunseri, C.; Inguanta, Rosalinda

doi:10.1016/j.renene.2018.02.033

Cited by 45 publications

(30 citation statements)

References 30 publications

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“…Among the different manufacturing methods, the electrochemical one appears extremely interesting because it is fast, easy to scale and simple. Furthermore, it allows obtaining different materials in different morphologies, successfully applicable and with excellent results in different electrochemical devices [49][50][51][52][53][54][55][56][57]. In particular, in the case of PANI, the electrodeposition method is very suitable because it permits controlling its physical-chemical characteristics [58][59][60][61].…”

Section: Introductionmentioning

confidence: 99%

PANI-Based Wearable Electrochemical Sensor for pH Sweat Monitoring

et al. 2021

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Nowadays, we are assisting in the exceptional growth in research relating to the development of wearable devices for sweat analysis. Sweat is a biofluid that contains useful health information and allows a non-invasive, continuous and comfortable collection. For this reason, it is an excellent biofluid for the detection of different analytes. In this work, electrochemical sensors based on polyaniline thin films deposited on the flexible substrate polyethylene terephthalate coated with indium tin oxide were studied. Polyaniline thin films were abstained by the potentiostatic deposition technique, applying a potential of +2 V vs. SCE for 90 s. To improve the sensor performance, the electronic substrate was modified with reduced graphene oxide, obtained at a constant potential of −0.8 V vs. SCE for 200 s, and then polyaniline thin films were electrodeposited on top of the as-deposited substrate. All samples were characterized by XRD, SEM, EDS, static contact angle and FT-IR/ATR analysis to correlate the physical-chemical features with the performance of the sensors. The obtained electrodes were tested as pH sensors in the range from 2 to 8, showing good behavior, with a sensitivity of 62.3 mV/pH, very close to a Nernstian response, and a reproducibility of 3.8%. Interference tests, in the presence of competing ions, aimed to verify the selectivity, were also performed. Finally, a real sweat sample was collected, and the sweat pH was quantified with both the proposed sensor and a commercial pH meter, showing an excellent concordance.

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Section: Introductionmentioning

confidence: 99%

PANI-Based Wearable Electrochemical Sensor for pH Sweat Monitoring

et al. 2021

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“…D-MAX 25,600 HK, Rigaku, Tokyo, Japan) was employed for XRD analyses. More details can be found in [24][25][26][27][28]. Charge/discharge cycles were carried out by means of a multi-channel cell test system (Solartron, 1470E, Ametek, PA, USA) at different temperatures.…”

Section: Methodsmentioning

confidence: 99%

High-Performance Lead-Acid Batteries Enabled by Pb and PbO2 Nanostructured Electrodes: Effect of Operating Temperature

et al. 2021

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Lead-acid batteries are now widely used for energy storage, as result of an established and reliable technology. In the last decade, several studies have been carried out to improve the performance of this type of batteries, with the main objective to replace the conventional plates with innovative electrodes with improved stability, increased capacity and a larger active surface. Such studies ultimately aim to improve the kinetics of electrochemical conversion reactions at the electrode-solution interface and to guarantee a good electrical continuity during the repeated charge/discharge cycles. To achieve these objectives, our contribution focuses on the employment of nanostructured electrodes. In particular, we have obtained nanostructured electrodes in Pb and PbO2 through electrosynthesis in a template consisting of a nanoporous polycarbonate membrane. These electrodes are characterized by a wider active surface area, which allows for a better use of the active material, and for a consequent increased specific energy compared to traditional batteries. In this research, the performance of lead-acid batteries with nanostructured electrodes was studied at 10 C at temperatures of 25, −20 and 40 °C in order to evaluate the efficiency and the effect of temperature on electrode morphology. The batteries were assembled using both nanostructured electrodes and an AGM-type separator used in commercial batteries.

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“…The material nanostructure increases the specific active area available for the catalysis of reactions, encourages chemical reactions since the chemical activity is higher at discontinuities or defects and enhances the charge transfer kinetics due to shorter electron-transfer distances and rapid diffusion rate [192]. Ganci et al [193] demonstrate that the surface area of a Ni-based catalyst electrodeposited inside the pores of a polycarbonate membrane increases of approximately two orders of magnitude with a favorable effect on electrocatalytic activity.…”

Section: Alkaline Electrolysis Cellsmentioning

confidence: 99%

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

et al. 2020

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Innovative renewable routes are potentially able to sustain the transition to a decarbonized energy economy. Green synthetic fuels, including hydrogen and natural gas, are considered viable alternatives to fossil fuels. Indeed, they play a fundamental role in those sectors that are difficult to electrify (e.g., road mobility or high-heat industrial processes), are capable of mitigating problems related to flexibility and instantaneous balance of the electric grid, are suitable for large-size and long-term storage and can be transported through the gas network. This article is an overview of the overall supply chain, including production, transport, storage and end uses. Available fuel conversion technologies use renewable energy for the catalytic conversion of non-fossil feedstocks into hydrogen and syngas. We will show how relevant technologies involve thermochemical, electrochemical and photochemical processes. The syngas quality can be improved by catalytic CO and CO2 methanation reactions for the generation of synthetic natural gas. Finally, the produced gaseous fuels could follow several pathways for transport and lead to different final uses. Therefore, storage alternatives and gas interchangeability requirements for the safe injection of green fuels in the natural gas network and fuel cells are outlined. Nevertheless, the effects of gas quality on combustion emissions and safety are considered.

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Nanostructured electrodes for hydrogen production in alkaline electrolyzer

Cited by 45 publications

References 30 publications

PANI-Based Wearable Electrochemical Sensor for pH Sweat Monitoring

PANI-Based Wearable Electrochemical Sensor for pH Sweat Monitoring

High-Performance Lead-Acid Batteries Enabled by Pb and PbO2 Nanostructured Electrodes: Effect of Operating Temperature

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

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