Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Ali Shahraei"'
Exploring Active Sites in Multi-Heteroatom-Doped Co-Based Catalysts for Hydrogen Evolution Reactions
Autor:
Robert W. Stark, K. Alexander Creutz, Markus Kübler, Natascha Weidler, Simon T. Ranecky, Oliver Clemens, Ioanna Martinaiou, W. David Z. Wallace, Mohammad Ali Nowroozi, Ali Shahraei, Ulrike I. Kramm
Publikováno v:
Chemistry - A European Journal. 24:12480-12484
Today, metal-N- as well as metal-S-doped carbon materials are known to catalyze the hydrogen evolution reaction (HER). However, especially N- and S-co-doped catalysts reach highest activity, but it remains unclear if the activity is related to MNx or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5c0bc3fb052e7b0f09798e528f0fd8f
https://doi.org/10.1002/chem.201802684
https://doi.org/10.1002/chem.201802684
Autor:
Ali Shahraei, Michael Dürrschnabel, Ulrike I. Kramm, Timo Schäfer, Leopoldo Molina-Luna, Christina S. Birkel, Minh Hai Tran
Publikováno v:
ACS Applied Energy Materials. 1:3908-3914
Two-dimensional transition-metal-based carbides (or nitrides), so-called MXenes, that can be derived from the three-dimensional MAX phases, have attracted considerable attention throughout the past...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::729594bd8e2c8901e9f3e859eb2887f6
https://doi.org/10.1021/acsaem.8b00652
https://doi.org/10.1021/acsaem.8b00652
Autor:
Robert W. Stark, Ali Shahraei, W. David Z. Wallace, Markus Kuebler, Natascha Weidler, Ulrike I. Kramm, K. Alexander Creutz, Ioanna Martinaiou, Mohammad Ali Nowroozi, Stephen Paul, Oliver Clemens
Publikováno v:
Journal of Materials Chemistry A. 6:22310-22319
The influence of high S/Co ratios on the structural composition and oxygen evolution reaction (OER) activity of a group of cobalt-based carbon catalysts was investigated. Catalysts were prepared from polyaniline, cobalt acetate and dicyandiamide as p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08cfb985673f64bbb062ec574f49b153
https://doi.org/10.1039/c8ta05769a
https://doi.org/10.1039/c8ta05769a
Publikováno v:
Nachrichten aus der Chemie. 65:1096-1099
Bereits seit einigen Jahren gelten Metall-N-C-Katalysatoren als vielversprechendste Alternative zu Pt/C, um Sauerstoff in Brennstoffzellen zu reduzieren. Diese Katalysatoren eignen sich jedoch auch fur viele andere elektrokatalytische Prozesse wie di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f74285421dad20771cf4d4e1a4cbdb73
https://doi.org/10.1002/nadc.20174055316
https://doi.org/10.1002/nadc.20174055316
Autor:
Jörg J. Schneider, Arne Janßen, Ioanna Martinaiou, Ali Shahraei, Deepu J. Babu, Stephen Paul, Ulrike I. Kramm, Natascha Weidler, Stephan Wagner, Robert W. Stark
Publikováno v:
ResearcherID
In view of the transfer from fossil fuels to renewable energies, electrochemical reactions offer the chance of a fast and environmentally friendly production of chemicals or the transfer of chemical energy into electric energy (e.g. via fuel cells).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21b1a9d4fa4be3dce33e5bd9089a81b8
https://doi.org/10.1149/08008.0691ecst
https://doi.org/10.1149/08008.0691ecst
Autor:
Stephanie Jeannie Dolique, Hongbin Zhang, Sebastian Klemenz, Fabian Grimm, Carolin Wittich, Robert W. Stark, Ali Shahraei, Hans-Joachim Kleebe, Ulrike I. Kramm, Ioanna Martinaiou
Publikováno v:
Electrochimica Acta. 243:183-196
Currently, Me-N-C catalysts are the most prominent alternative to Pt/C catalysts for the oxygen reduction reaction in acidic media. It is well known that the achievable activity and selectivity strongly correlates with the nature of metal species. Ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e192d6a399a398cce512307befcf01f
https://doi.org/10.1016/j.electacta.2017.04.134
https://doi.org/10.1016/j.electacta.2017.04.134
Autor:
Ulrike I. Kramm, Ali Shahraei, W. David Z. Wallace, Stephan Wagner, Natascha Weidler, Ioanna Martinaiou, Robert W. Stark, Stephen Paul, Alessandro Hugo Monteverde Videla, Stefania Specchia, Markus Kübler
Publikováno v:
Applied Catalysis B: Environmental. 262:118217
In this work a comprehensive study of the activity and stability of a non-precious metal catalyst of type Fe- N- C in acidic media is reported. The catalyst was prepared from polyaniline, dicyandiamide and iron acetate as precursors. Temperature-depe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::802a1d4031ae19f3e79b1ae55059ef56
https://doi.org/10.1016/j.apcatb.2019.118217
https://doi.org/10.1016/j.apcatb.2019.118217
Autor:
Stephan Wagner, Robert W. Stark, Arne Janßen, Ioanna Martinaiou, Gui-Rong Zhang, Bastian J. M. Etzold, Ali Shahraei, Ulrike I. Kramm, Thomas Wolker, Natascha Weidler
Publikováno v:
Journal of Power Sources
It is well known that Fe-N-C catalysts reach a significantly better ORR activity in alkaline compared to acidic electrolyte. This advantage makes the material of interest for application in alkaline fuel cells. Beside this, for Pt/C catalyst it is kn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::292f055b260b989f84074d56f12aedee
https://doi.org/10.5281/zenodo.1478750
https://doi.org/10.5281/zenodo.1478750
Publikováno v:
Hyperfine Interactions. 239
Fe-N-C catalysts are the most promising group of non-precious metal catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFC). This study focusses on two different porphyrin-based Fe-N-C catalysts and a Fe-N-C c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::379b652dd2ff09e882462e24e4d85b2f
https://doi.org/10.1007/s10751-017-1485-8
https://doi.org/10.1007/s10751-017-1485-8
Autor:
Ali Shahraei, Ulrike I. Kramm, Arne Janßen, Natascha Weidler, Steven Wagner, Ioanna Martinaiou
Publikováno v:
Hyperfine Interactions. 239
Fe-N-C catalysts were prepared by a new synthesis protocol at 800 ∘C with subsequent acid leaching. The effect of sulfur was investigated by a systematic study in which the molar S/Fe ratio in the precursor was varied from 0.0 to 2.45. The obtained
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fba4a956b9d1f7d49c988f06067e8614
https://doi.org/10.1007/s10751-017-1481-z
https://doi.org/10.1007/s10751-017-1481-z