Abstract

Ordered nanoporous silicas containing various binary copper-manganese oxides were prepared as catalytic systems for effective carbon monoxide elimination. The carbon monoxide elimination efficiency was demonstrated as a function of the [Mn]/[Cu] ratio and reaction time. The prepared catalysts were characterized by Brunauer-Emmett-Teller (BET) method, small- and wide-angle X-ray diffraction (XRD), and high-resolution transmission electron microscopy (HR-TEM) for structural analysis. Moreover, quantitative analysis of the binary metal oxides within the nanoporous silica was achieved by inductively coupled plasma (ICP). The binary metal oxide-loaded nanoporous silica showed high room temperature catalytic efficiency with over 98 % elimination of carbon monoxide at higher concentration ratio of [Mn]/[Cu].Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-015-1197-4) contains supplementary material, which is available to authorized users.

Highlights

  • Methods to effectively eliminate carbon monoxide have attracted much attention [1,2,3,4,5]

  • Transition metal oxides like CuOx, MnOx, and FeOx have so far been used for the elimination of carbon monoxide in bimetallic forms [13,14,15]

  • This approach enables the facile development of binary CuMnOx nanoparticles in the highly ordered mesopores, which results in effective CO removal

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Summary

Introduction

Methods to effectively eliminate carbon monoxide have attracted much attention [1,2,3,4,5]. It would be better to cite some examples [6,7,8] Even though these supported noble metal-based catalysts have shown high activities for carbon monoxide elimination, their further application has been limited due to difficulties in reuse, sintering at high temperature, and high cost [9,10,11,12]. For this reason, the development of transition metal oxide catalysts as alternatives has gained much interest. The binary Cu-Mn oxides have flexible metal valences

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