Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Janis Kleperis"'
Publikováno v:
Journal of Mechanical Engineering, Vol 26, Iss 4, Pp 59-66 (2023)
It is shown that increase in the hydrogen production process efficiency can be ensured by integrating radiochemical and electrochemical processes. In this case, the obtained effect depends not only on the direct radiolysis of water, but also on the i
Externí odkaz:
https://doaj.org/article/1661e8d1a07647cd8c7cb837ec3963f5
Publikováno v:
ChemEngineering, Vol 8, Iss 4, p 80 (2024)
This study investigates nitrogen-doped carbon synthesis and electrochemical properties as electrode material for energy storage devices, an additional focus of the work is on the electrochemical exfoliation synthesis of nitrogen-doped carbon using va
Externí odkaz:
https://doaj.org/article/ae0e6b119c274e80a6d3d0807a0e5ccb
Autor:
Marius Urbonavicius, Sarunas Varnagiris, Ainars Knoks, Ansis Mezulis, Janis Kleperis, Christiaan Richter, Rauan Meirbekova, Gudmundur Gunnarsson, Darius Milcius
Publikováno v:
Materials, Vol 17, Iss 11, p 2637 (2024)
This study investigates the low-temperature hydrogen plasma treatment approach for the improvement of hydrogen generation through waste aluminum (Al) reactions with water and electricity generation via proton-exchange membrane fuel cell (PEM FC). Was
Externí odkaz:
https://doaj.org/article/db340a6b42104f3488e86499445e34fb
Publikováno v:
Electrochem, Vol 3, Iss 2, Pp 229-238 (2022)
Renewable energy resources (wind, solar) are unpredictable, so it is wise to store the electricity they generate in an energy carrier X. Various PtX (power to useful energy-intensive raw material such as hydrogen, synthetic natural gas, fuel) applica
Externí odkaz:
https://doaj.org/article/f77fb4d2d3554898844e53829a0d788f
Autor:
Ansis Mezulis, Christiaan Richter, Peteris Lesnicenoks, Ainars Knoks, Sarunas Varnagiris, Marius Urbonavicius, Darius Milcius, Janis Kleperis
Publikováno v:
Energies, Vol 16, Iss 14, p 5554 (2023)
This work aims to explain aluminum hydrolysis reaction kinetics based on a properly chosen theoretical model with machined aluminum waste chips as well as alkali solutions up to 1M as a promoter and to estimate the overall reaction profit. The purpos
Externí odkaz:
https://doaj.org/article/c01222a58c134fd9805803c4ce946cd5
Autor:
Matiss Paiders, Vizma Nikolajeva, Galina Makarenkova, Liana Orola, Ilze Dimanta, Janis Kleperis
Publikováno v:
Electronic Journal of Biotechnology, Vol 49, Iss , Pp 34-41 (2021)
Background: This work studied how the exposure to an unusual substrate forced a change in microbial populations during anaerobic fermentation of crude glycerol, a by-product of biodiesel production, with freshwater sediment used as an inoculum. Resul
Externí odkaz:
https://doaj.org/article/2e3f5105d8814a909467901ee2180153
Autor:
Oleg Lisovski, Sergei Piskunov, Dmitry Bocharov, Yuri F. Zhukovskii, Janis Kleperis, Ainars Knoks, Peteris Lesnicenoks
Publikováno v:
Crystals, Vol 12, Iss 2, p 194 (2022)
Single-layer graphene decorated with monodisperse copper nanoparticles can support the size and mass-dependent catalysis of the selective electrochemical reduction of CO2 to ethylene (C2H4). In this study, various active adsorption sites of nanostruc
Externí odkaz:
https://doaj.org/article/d9f046ad56ae4b2dbeb70c15fd1dec97
Autor:
Peteris LESNICENOKS, Janis ZEMITIS, Liga GRINBERGA, George CHIKVAIDZE, Janis KLEPERIS, Marius URBONAVIČIUS, Simona TUČKUTE, Darius MILČIUS
Publikováno v:
Medžiagotyra, Vol 23, Iss 1, Pp 3-5 (2017)
Graphene sheet stacks were obtained using electrochemical exfoliation method. The morphology, distribution of elements and structure of the obtained samples were investigated using scanning electron microscopy, energy dispersive spectroscopy, Raman s
Externí odkaz:
https://doaj.org/article/9c1dbacf7a124722be277c8af05095cf
Autor:
Ansis Mezulis, Christiaan Richter, Peteris Lesnicenoks, Ainars Knoks, Sarunas Varnagiris, Marius Urbonavicius, Darius Milcius, Janis Kleperis
The present work aims to explain the aluminum hydrolysis reaction kinetics based on properly chosen theoretical model with machined aluminum waste chips and alkali solutions up to 1M as a promoter, and to estimate overall reaction profit. In order to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39b44228ccf0988c45a37c30de5d677b
https://doi.org/10.20944/preprints202304.0428.v1
https://doi.org/10.20944/preprints202304.0428.v1
Publikováno v:
Regional Formation and Development Studies. :60-66
From 2008 the education action – Latvian Solar Cup – is organized in University of Latvia. In this event, intended for pupils and students, the basics of one of the types of renewable energy – solar photovoltaic – are taught, and pupils from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef27c78ddc4eb9865aee29613d6e5143
https://doi.org/10.15181/rfds.v6i1.2329
https://doi.org/10.15181/rfds.v6i1.2329