OPEN ACCESS

Articles online

Influence of Sr Substitution on Catalytic Performance of LaMnO3/Ni Metal foam Composite for CO Oxidation

Category: Control Techniques and Strategy

Volume: 15 | Issue: 4 | Pages: 1662-1671
DOI: 10.4209/aaqr.2014.11.0286
PDF | RIS | BibTeX

Po-Yang Peng1, Yi-Chiun Tsai2, Jen-Taut Yeh2, Yung-Sen Lin3, Chao-Ming Huang 2

  • 1 Department of Chemical Engineering and Biotechology, National Taipei University of Technology, Taipei, Taiwan
  • 2 Department of Materials Engineering, Kun Shan University, Tainan, Taiwan
  • 3 Department of Chemical Engineering, Feng Chia University, Taichung, Taiwan

Highlights

La1-xSrxMnO3/MF composite catalysts were prepared without the use of a binder.

Molar ratio of Sr/La markedly influenced catalytic oxidation of CO of catalyst.

La0.8Sr0.2MnO3/MF exhibited the highest activity and stability among the samples.

High performance was ascribed to mesoporous structure and adsorbed oxygen species.


Abstract

A series of Sr-substituted lanthanum manganite perovskites, La1-xSrxMnO3 (LSMO, x = 0, 0.1, 0.2, and 0.3), with mesoporous structures were prepared and coated onto a three-dimensional Ni metal foam (MF) as composite catalysts. The catalytic performances of La0.8Sr0.2MnO3/MF and La0.7Sr0.3MnO3/MF were found to be superior to those of La0.9Sr0.1MnO3/MF, LaMnO3/MF, and LaMnO3 powder in terms of catalytic oxidation of carbon monoxide with air. Under the reaction conditions (1.5 vol.% CO and air balance at a weight hourly space velocity of 90,000 hr–1), La0.8Sr0.2MnO3/MF reached 100% catalytic oxidation of CO, which is 27% higher than that of LaMnO3 powder. Sr substitution induced an increase of Mn4+ and adsorbed surface oxygen species (O, O2, or O22–), which increased the number of active centers for oxidation and thus enhanced the oxidizing ability of the catalyst. The high activity and excellent stability of La0.8Sr0.2MnO3/MF catalyst can be ascribed to a synergistic effect between the mesoporous structure and the high number of adsorbed oxygen species of the catalyst as well as the interconnected three-dimensional reticular configuration of the nickel metal support, which increases the number of active sites and enhances mass transfer for CO and O2. La0.8Sr0.2MnO3/MF composite can potentially be used in catalytic converters for CO removal of automotive exhaust gases.

Keywords

LSMO Nickel metal foam Catalytic oxidation Carbon monoxide


Related Article

Effect of MnO2 Crystalline Structure on the Catalytic Oxidation of Formaldehyde

Huiqi Lin, Dong Chen , Haibo Liu, Xuehua Zou, Tianhu Chen
Volume: 17 | Issue: 4 | Pages: 1011-1020
DOI: 10.4209/aaqr.2017.01.0013
PDF

Ozone Catalytic Oxidation of Gaseous Toluene over MnO2-Based Ozone Decomposition Catalysts Immobilized on a Nonwoven Fabric

Kazuhiko Sekiguchi , Yuki Kurita, Kenshi Sankoda, Norikazu Namiki, Fumio Yasui, Hajime Tamura
Accepted Manuscripts
DOI: 10.4209/aaqr.2017.01.0045
PDF

Novel Method for Preparing Controllable Nanoporous α-Fe2O3 and its Reactivity to SCR De-NOx

Haibo Liu, Zexin Zhang, Qian Li, Tianhu Chen , Changai Zhang, Dong Chen, Chengzhu Zhu, Yang Jiang
Volume: 17 | Issue: 7 | Pages: 1898-1908
DOI: 10.4209/aaqr.2017.05.0188
PDF

Effects of Nutrient Availability on the Biomass Production and CO2 Fixation in a Flat Plate Photobioreactor

Chih Ming Su, Hsin Ta Hsueh, Chi Ming Tseng, Dah Tong Ray, Yun Hwei Shen, Hsin Chu
Volume: 17 | Issue: 7 | Pages: 1887-1897
DOI: 10.4209/aaqr.2016.09.0386
PDF | Supplemental material
;