Promoting effect of Rh on the activity and stability of Pt-based methane combustion catalyst in microreactors

被引：11

作者：

Neuberg, Stefan ^{[1
]}

Pennemann, Helmut ^{[1
]}

Shanmugam, Vetrivel ^{[1
]}

Zapf, Ralf ^{[1
]}

Kolb, Gunther ^{[1
]}

机构：

[1] Fraunhofer Inst Microengn & Microsyst, Carl Zeiss Str 18-20, D-55129 Mainz, Germany

来源：

CATALYSIS COMMUNICATIONS | 2021年 / 149卷

关键词：

Methane; Combustion; Platinum; Rhodium; Bimetallic; Catalytic stability; SYNGAS PRODUCTION; OXIDATION; BIOGAS; STEAM; PD; ACTIVATION; PD/AL2O3; STATE;

D O I：

10.1016/j.catcom.2020.106202

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：

For the combustion of methane, a partial replacement of platinum by rhodium leads to a significantly improved light-off behavior of the corresponding mixed Pt-Rh/gamma-Al2O3 catalysts compared to a catalyst containing only Pt supported on gamma-Al2O3. For all Pt-Rh/gamma-Al2O3 catalysts, mixed Pt-Rh crystals of low particle size were found. At 600 degrees C, the stability of catalysts, was found to increase with increasing rhodium content. The crystal size was determined by HR-TEM for spent catalyst samples after 40 h stability test. The samples containing higher amounts of rhodium showed smaller crystal size suggesting this as the origin of the increased catalyst stability.

引用

页数：5

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