Active size-controlled Ru catalysts for selective CO oxidation in H2

被引：20
作者：
Kim, Yun Ha [1 ,2 ]
Park, Jung Eun [1 ,2 ]
Lee, Hyun Chul [3 ]
Choi, Sun Hee [4 ]
Park, Eun Duck [1 ,2 ]
机构：
[1] Ajou Univ, Div Energy Syst Res, Suwon 443749, South Korea
[2] Ajou Univ, Div Chem Engn & Mat Engn, Suwon 443749, South Korea
[3] Samsung Elect, Samsung Adv Inst Technol SAIT, Energy Lab, Yongin 446712, Kyunggi Do, South Korea
[4] Pohang Univ Sci & Technol POSTECH, Pohang Accelerator Lab, Pohang 790784, South Korea
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2012年 / 127卷
基金：
新加坡国家研究基金会;
关键词：
Selective CO oxidation; Ru catalysts; Pretreatment; CO oxidation; Size effect; SURFACE IGNITION REGIME; HYDROGEN-RICH STREAM; PREFERENTIAL OXIDATION; CARBON-MONOXIDE; RU/AL2O3; CATALYST; NANOPARTICLES; REMOVAL; GAS; TEMPERATURE; PHASE;
D O I：
10.1016/j.apcatb.2012.08.010
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：
We propose an activation method to control Ru particle size in supported Ru catalysts, viz. commercial Ru/Al2O3 and home-made Ru/SiO2, in order to increase the catalytic activity for the preferential CO oxidation (PROX). Ru particle size is controlled by adjusting pre-treatment conditions and it affects the catalytic activity for the PROX over supported Ru catalysts. Several measurements: inductively coupled plasma-atomic emission spectroscopy (ICP-AES), bright-field transmission electron microscopy (TEM), X-ray absorption fine structure (XAFS). CO chemisorption, and O-2 chemisorption were conducted to characterize the catalysts. The co-presence of H-2 and O-2 is essential for controlling the Ru particle size accurately. The PROX activity especially at low temperatures increases with increasing particle size of Ru, which seems to be closely related to the adsorption behavior of O-2 on Ru surface. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：129 / 136
页数：8
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