| 000 | 03068nlm1a2200505 4500 | ||
|---|---|---|---|
| 001 | 636298 | ||
| 005 | 20231030040130.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\194 | ||
| 035 | _aRU\TPU\network\79 | ||
| 090 | _a636298 | ||
| 100 | _a20131112a2013 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 135 | _adrnn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aEffect of redox treatments on activation and deactivation of gold nanospecies supported on mesoporous silica in CO oxidation _fN. Bogdanchikova [et al.] |
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| 203 |
_aText _celectronic |
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| 300 | _aTitle screen | ||
| 320 | _a[References: p. 46-47 (70 tit.)] | ||
| 330 | _aThe influence of pretreatments with He, O2 and H2 on the physicochemical and catalytic properties of gold supported on hexagonal mesoporous silica (HMS) has been studied by a variety of methods including: XPS, TPR, N2 sorption, UV-visible spectroscopy, FTIR and catalytic testing. The investigations show supported gold to form different states under redox treatments: Au3+ and Au+ ions, neutral and partly charged gold clusters and metal nanoparticles of different sizes. Reducing pretreatments increase the catalytic activity of the samples; while oxidative treatments deactivate the catalyst. Catalytic tests show several regions of the reduced samples with various catalytic behaviours: 20-200 °C, 200-400 °C and >400 °C; this situation is explained by the co-existence of gold active sites of different types. A comparative analysis among spectroscopic and catalytic data allows suggesting clusters to be responsible for the activity in the low-temperature region (<200 °C); neutral Aun clusters are active in the range 200-400 °C; and gold nanoparticles may catalyze high-temperature CO oxidation. Au3+ ions are inactive in this process. | ||
| 333 | _aРежим доступа: по договору с организацией-держателем ресурса | ||
| 461 | _tFuel | ||
| 463 |
_tVol. 110 : IMCCRE 2012 “International-Mexican Congress on Chemical Reaction Engineering” _v[P. 40-47] _d2013 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _agold | |
| 610 | 1 | _aзолото | |
| 610 | 1 | _asilica | |
| 610 | 1 | _aкремнеземы | |
| 610 | 1 | _aoxidation | |
| 610 | 1 | _aокисление | |
| 610 | 1 | _aclusters | |
| 610 | 1 | _aкластеры | |
| 610 | 1 | _ananoparticles | |
| 610 | 1 | _aнаночастицы | |
| 701 | 1 |
_aBogdanchikova _bN. |
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| 701 | 1 |
_aPestryakov _bA. N. _cChemist _cProfessor of Tomsk Polytechnic University, Doctor of Chemical Science _f1963- _gAleksey Nikolaevich _2stltpush _3(RuTPU)RU\TPU\pers\30471 |
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| 701 | 1 |
_aTuzovskaya _bI. |
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| 701 | 1 |
_aZepeda _bT. A. |
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| 701 | 1 |
_aFarias _bM. H. |
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| 701 | 1 |
_aTiznado _bH. |
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| 701 | 1 |
_aMartynyuk _bO. A. _cchemist _cResearcher of Tomsk Polytechnic University, Candidate of chemical sciences _f1982- _gOksana Anatolievna _2stltpush _3(RuTPU)RU\TPU\pers\31284 |
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| 801 | 2 |
_aRU _b63413507 _c20151224 _gRCR |
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| 856 | 4 | _uhttp://dx.doi.org/10.1016/j.fuel.2012.09.064 | |
| 942 | _cCF | ||