Strong synergism between gold and manganese in an Au-Mn/triple-oxide-support (TOS) oxidation catalyst

被引：15

作者：

Ali, Arshid M. ^{[1
]}

Daous, Muhammad A. ^{[1
]}

Khamis, Ahmad A. M. ^{[1
]}

Driss, Hafedh ^{[1
]}

Burch, Robbie ^{[2
]}

Petrov, Lachezar A. ^{[3
]}

机构：

[1] King Abdulaziz Univ, Fac Engn, Dept Chem & Mat Engn, Jeddah 21589, Saudi Arabia

[2] Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT7 1NN, Antrim, North Ireland

[3] King Abdulaziz Univ, SABIC Chair Catalysis, Jeddah 21589, Saudi Arabia

来源：

APPLIED CATALYSIS A-GENERAL | 2015年 / 489卷

关键词：

VOLATILE ORGANIC-COMPOUNDS; PROPANE SELECTIVE OXIDATION; VAN KREVELEN MECHANISM; MIXED OXIDES; THIN-FILMS; COMBUSTION; REDUCTION; REMOVAL; VOCS; MARS;

D O I：

10.1016/j.apcata.2014.10.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A strong synergism between Au and Mn substantially increased the catalytic activity of the Au-Mn/TOS catalyst for the complete propane oxidation as compared to the activity of mono metal Au/TOS and Mn/TOS catalysts. The high activity of Au-Mn/TOS catalyst is a result of the formation of Au2Mn or Au5Mn2 phases and enhanced mobility of the oxygen in the support oxides. XPS, TPR, TEM and XRD studies were used to characterise the catalysts. Based on the results, a possible mechanism for the participation of the non-stoichiometric and lattice oxygen is also proposed. It is suggested that a joint effect of the Au and Mn increased the non-stoichiometric and lattice oxygen mobility of the Au-Mn/TOS catalyst, potentially being dominated by Mn. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：24 / 31

页数：8

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