The role of chemisorbed water in formation and stabilization of active sites on Pd/Alumina oxidation catalysts

被引：35

作者：

Vedyagin, Aleksey A. ^{[1
,2
]}

Volodin, Alexander M. ^{[1
]}

Kenzhin, Roman M. ^{[1
]}

Stoyanovskii, Vladimir O. ^{[1
]}

Rogov, Vladimir A. ^{[1
,3
]}

Kriventsov, Vladimir V. ^{[1
]}

Mishakov, Ilya V. ^{[1
,2
]}

机构：

[1] Boreskov Inst Catalysis, Novosibirsk 630090, Russia

[2] Natl Res Tomsk Polytech Univ, Tomsk 634050, Russia

[3] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

CATALYSIS TODAY | 2018年 / 307卷

关键词：

CO oxidation; Palladium catalysts; Alumina; Stability; Chemisorbed water; PALLADIUM-ALUMINA CATALYSTS; CARBON-MONOXIDE OXIDATION; VENTILATION AIR METHANE; PD/AL2O3; CATALYSTS; GAMMA-ALUMINA; SUPPORTED PALLADIUM; 3-WAY CATALYSTS; HYDROXYL-GROUPS; ELECTRON-DONOR; CO OXIDATION;

D O I：

10.1016/j.cattod.2017.01.033

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of Pd/Al2O3 catalysts with different palladium loading was prepared by incipient wetness impregnation method. As it was shown by various physicochemical methods, palladium at concentrations not exceeding 0.5 wt.% favors to stabilize in an atomic dispersed ionic state. Appearance of PdO phase has been firmly detected by TPR, DR UV-vis and EXAFS starting from Pd concentration of 1 wt.%. It was found that low-content Pd/Al2O3 catalysts are characterized by high activity in CO oxidation due to atomically dispersed palladium species tailored to the donor sites of the support. The presence of chemisorbed water allows one to stabilize Pd in highly disperse state thus preventing the catalyst deactivation. (c) 2017 Elsevier B.V. All rights reserved.

引用

页码：102 / 110

页数：9

共 50 条

[41] The study of the active surface for CO oxidation over supported Pd catalysts
Weng, Xuefei
Yuan, Xiang
Li, Huan
Li, Xiaokun
Chen, Mingshu
Wan, Huilin
SCIENCE CHINA-CHEMISTRY, 2015, 58 (01) : 174 - 179
[42] The study of the active surface for CO oxidation over supported Pd catalysts
Xuefei Weng
Xiang Yuan
Huan Li
Xiaokun Li
Mingshu Chen
Huilin Wan
Science China(Chemistry), 2015, 58 (01) : 174 - 179
[43] The study of the active surface for CO oxidation over supported Pd catalysts
Xuefei Weng
Xiang Yuan
Huan Li
Xiaokun Li
Mingshu Chen
Huilin Wan
Science China Chemistry, 2015, 58 : 174 - 179
[44] Physicochemical study of active sites of metal catalysts for alcohol partial oxidation
Pestryakov, AN
Lunin, VV
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2000, 158 (01) : 325 - 329
[45] The nature of active sites in Cu/pentasil catalysts for deep oxidation of hydrocarbons
Kharson, MS
Kulesh, IA
Bulatova, MA
Bondarenko, TN
Dergachev, AA
Kiperman, SL
Slinkin, AA
KINETICS AND CATALYSIS, 1996, 37 (01) : 67 - 72
[46] On the Structure Sensitivity of CO Oxidation on Alumina Supported Pd-Pt Bimetallic Catalysts
Kaya, Sarp
Erunal, Ebru
Shaltaf, Riad
Ellialtioglu, Sinasi
Uner, Deniz
TURKISH JOURNAL OF CHEMISTRY, 2009, 33 (01) : 11 - 21
[47] Oxidation and reduction effects of propane-oxygen on Pd-chlorine/alumina catalysts
Schmal, M
Aranda, DAG
Noronha, FB
Guimaraes, AL
Monteiro, RS
CATALYSIS LETTERS, 2000, 64 (2-4) : 163 - 169
[48] Role of phosphates in promotion of silver catalysts for partial oxidation: II. Formation of active sites in the structure of silver phosphate under the action of a reductive medium
A. S. Knyazev
O. V. Magaev
O. V. Vodyankina
A. I. Titkov
A. N. Salanov
S. V. Koshcheev
A. I. Boronin
Kinetics and Catalysis, 2005, 46 : 151 - 156
[49] Inhibition of carbon monoxide on methanol oxidation over γ-alumina supported Ag, Pd and Ag-Pd catalysts
Wang, JA
Aguilar-Ríos, G
Wang, R
APPLIED SURFACE SCIENCE, 1999, 147 (1-4) : 44 - 51
[50] Role of phosphates in promotion of silver catalysts for partial oxidation: II. Formation of active sites in the structure of silver phosphate under the action of a reductive medium
Knyazev, AS
Magaev, OV
Vodyankina, OV
Titkov, AI
Salanov, AN
Koshcheev, SV
Boronin, AI
KINETICS AND CATALYSIS, 2005, 46 (01) : 151 - 156

← 1 2 3 4 5 →