Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Piotr Winiarek"'
Publikováno v:
Molecules, Vol 29, Iss 13, p 3180 (2024)
A new type of catalyst containing magnesium oxide modified with various modifiers ranging from bromine and iodine, to interhalogen compounds, hydrohalogenic acids, and alkyl halides have been prepared using chemical vapor deposition (CVD) and wet imp
Externí odkaz:
https://doaj.org/article/9e44f8c68ba8412cbc55848742941ec6
Autor:
Magdalena Bonarowska, Maria Wojciechowska, Maciej Zieliński, Angelika Kiderys, Michał Zieliński, Piotr Winiarek, Zbigniew Karpiński
Publikováno v:
Molecules, Vol 21, Iss 12, p 1620 (2016)
Pd/MgO, Pd/MgF2 and Pd/MgO-MgF2 catalysts were investigated in the reaction of CCl4 hydrodechlorination. All the catalysts deactivated in time on stream, but the degree of deactivation varied from catalyst to catalyst. The MgF2-supported palladium wi
Externí odkaz:
https://doaj.org/article/16ac6b0f8209406f9df229998c012c12
Autor:
Piotr Winiarek, Marcin Pisarek, Maria Janik-Czachor, Piotr Kedzierzawski, Mariusz Łukaszewski
Publikováno v:
Applied Catalysis A: General. 358:240-248
Raney-type Ni-based catalysts containing a small amount of Cr or Co were prepared from Ni 32− x Al 68 Cr x and Ni 32− x Al 68 Co x ( x = 1, 3 or 6) rapidly quenched alloys by leaching in 1 M NaOH. These degradation processes occurring at the surf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::583bc9e381db205a527a5918887d5080
https://doi.org/10.1016/j.apcata.2009.02.012
https://doi.org/10.1016/j.apcata.2009.02.012
Autor:
Maria Janik-Czachor, Marcin Pisarek, Piotr Winiarek, Mariusz Łukaszewski, Piotr Kedzierzawski
Publikováno v:
Materials Chemistry and Physics. 114:774-779
Degradation processes occurring during leaching in NaOH aqueous solution at the surface and in the bulk of Ni–Al–Cr rapidly quenched alloy, initially containing 29% at. Ni, 68% at. Al and 3% at. Cr, were used for promoting its catalytic activity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0959815fe9908e76497238cd4f1edf1e
https://doi.org/10.1016/j.matchemphys.2008.10.027
https://doi.org/10.1016/j.matchemphys.2008.10.027
Autor:
Piotr Winiarek, Marcin Pisarek, Maria Janik-Czachor, Mariusz Łukaszewski, Piotr Kedzierzawski
Publikováno v:
Catalysis Communications. 10:213-216
The influence of Cr (1–6 at.%) on the catalytic activity and selectivity of Ni–Al alloy in isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) hydrogenation was studied. The catalysts were obtained from the rapidly quenched precursors by leaching in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a5e376a256c8727764f3cc1a641507b
https://doi.org/10.1016/j.catcom.2008.08.029
https://doi.org/10.1016/j.catcom.2008.08.029
Publikováno v:
Inorganic Chemistry Communications. 7:871-875
An efficient synthesis of molybdenum(V) corrolates is detailed and some of their spectroscopic properties are described. Paramagnetic character of these complexes was confirmed by ESR measurements.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::245123c56dc671bc026b300b656a01dd
https://doi.org/10.1016/j.inoche.2004.05.010
https://doi.org/10.1016/j.inoche.2004.05.010
Publikováno v:
Reaction Kinetics and Catalysis Letters. 81:333-339
Transformations of diphenylmethane were investigated in a flow system in the presence of alumina and silica-alumina modified with boron trifluoride at atmospheric pressure and elevated temperatures. Hydrogen transfer reaction was observed on addition
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e64d1c0bd141c97f9c8a7994b8cc451
https://doi.org/10.1023/b:reac.0000019441.12692.99
https://doi.org/10.1023/b:reac.0000019441.12692.99
Publikováno v:
Applied Catalysis A: General. 233:171-182
Platinum deposited on supports (SiO 2 , γ-Al 2 O 3 , MgO, TiO 2 ) covered with a transition metal oxide monolayer (TiO 2 , V 2 O 5 , ZrO 2 ) was used in hydrogenation of furfural to furfuryl alcohol. Reactions were carried out under atmospheric pres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed77d2bef0d5fba159686c48832acbd8
https://doi.org/10.1016/s0926-860x(02)00140-0
https://doi.org/10.1016/s0926-860x(02)00140-0
Autor:
Piotr Winiarek, Jacek Kijeński
Publikováno v:
Applied Catalysis A: General. 193:L1-L4
New Pt catalysts deposited on monolayer supports containing TiO 2 have been tested in the hydrogenation of α,β-unsaturated aldehydes. Enhancement of selectivity towards unsaturated alcohols has been observed in comparison to the commonly used Pt/Si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5d754607fa7688890b1ce5bd3e5d289
https://doi.org/10.1016/s0926-860x(99)00433-0
https://doi.org/10.1016/s0926-860x(99)00433-0
Autor:
Piotr Winiarek, Elżbieta Fedoryńska
Publikováno v:
Reaction Kinetics and Catalysis Letters. 63:235-239
Transfer hydrogenation of phenanthrene was performed in the presence of superbases or strong acids and gaseous hydrogen. The influence of hydrogen on the yield of these reactions was discussed with respect to the mechanism of hydrogen transfer.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74742c7c9ed9ae25ac34794567ee80a2
https://doi.org/10.1007/bf02475393
https://doi.org/10.1007/bf02475393