|
|
|
|
| LEADER |
00000naa0a2200000 4500 |
| 001 |
599112 |
| 005 |
20250416092827.0 |
| 035 |
|
|
|a (RuTPU)RU\TPU\tpu\22964
|
| 035 |
|
|
|a RU\TPU\tpu\22963
|
| 090 |
|
|
|a 599112
|
| 100 |
|
|
|a 20130328d2008 k||y0rusy50 ba
|
| 101 |
0 |
|
|a eng
|
| 102 |
|
|
|a FR
|
| 200 |
1 |
|
|a Formation of catalytically active copper and nickel nanoparticles in natural zeolites
|f V. Petranovskii [et al.]
|
| 330 |
|
|
|a Structure, thermostability and catalytic properties of copper and nickel nanoparticles in natural and synthetic zeolites have been studied using methods of XRD, elemental analysis, UV-visible spectroscopy, MAS NMR, TEM and catalytic testing. Different states of Cu have been identified by UV-Vis spectroscopy: Cu+ and Cu2+ ions, O-Cu-O and Cu-O-Cu complexes and Cu nanoparticles. Measurements of synthetic zeolites showed that shape and position of plasma resonance band depend on the acidity of zeolite supports. The most acid mordenites with Si/Al≈7-10 prevents formation of copper nanoparticles while Cu2+ is reduced to Cu+ and few atomic Cun clusters. Less acid erionite, clinoptilolite and mordenites with high Si/Al ratio promote formation of Cu nanoparticles. For Ni-exchanged zeolites spectra typical for Ni(H2O)62+ are observed. The spectra changed with increasing temperature due to dehydration of Ni2+ coordination sphere and replacement of H2O ligand molecules by oxygen atoms of zeolite framework. The catalytic experiments demonstrate that the temperature of beginning of hydrocarbons conversion starts in 170-250°C range, depending on the composition of the catalyst. The complete conversion can be observed for all zeolites, depending (probably) on Si/Al ratio of the zeolite matrix. No destruction of crystalline structure was observed from XRD and 27Al MAS NMR spectra under conditions used for catalytic tests.
|
| 333 |
|
|
|a В фонде НТБ ТПУ отсутствует
|
| 463 |
|
|
|t 4th FEZA Conference, Collège de France, Paris, France, september, 2-6, 2008
|o book of abstracts and recent research reports
|v PI-C05
|d 2008
|
| 610 |
1 |
|
|a труды учёных ТПУ
|
| 701 |
|
1 |
|a Petranovskii
|b V.
|
| 701 |
|
1 |
|a Pestryakov
|b A. N.
|c Chemist
|c Professor of Tomsk Polytechnic University, Doctor of Chemical Science
|f 1963-
|g Aleksey Nikolaevich
|3 (RuTPU)RU\TPU\pers\30471
|4 070
|9 14796
|
| 701 |
|
1 |
|a Kazantseva
|b L. K.
|
| 701 |
|
1 |
|a Cruz
|b J.
|
| 701 |
|
1 |
|a Kryazhov
|b A. N.
|
| 801 |
|
1 |
|a RU
|b 63413507
|c 20130326
|
| 801 |
|
2 |
|a RU
|b 63413507
|c 20130328
|g RCR
|
| 850 |
|
|
|a 63413507
|
| 942 |
|
|
|c BK
|
