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Issue 20, 2017
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Fabrication of homogeneously Cu2+/La3+-doped CeO2 nanosheets and their application in CO oxidation

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Abstract

Nanosheets of coordination polymers (CPs) were synthesized via a facile and one-step complexing-coprecipitation (CC) method. Upon calcination, pure CeO2 and homogeneously La3+- or Cu2+-doped CeO2 products were fabricated by using CPs as precursors. The final products not only retained a stable nano-scale sheet-shaped morphology of their CP precursors, but also possessed high catalytic activity towards CO oxidation. Superior to commercial ceria with negligible catalytic activity, the synthesized CeO2 nanosheets exhibited high activity achieving a CO conversion of 60% at a temperature of 360 °C. When doped with Cu2+, remarkable improvement of catalysis is observed owing to the homogeneous incorporation of Cu2+ into the CeO2 lattice. As a catalytically active center, uniformly dispersed CuO also produces more oxygen vacancies and improves oxygen mobility, which results in an enhancement in catalytic activity. The detected temperatures with 50% CO conversion (T50) for Cu0.1Ce0.9O2−δ and Cu0.04Ce0.96O2−δ are 83 and 95 °C, respectively. In contrast, the catalytic test for La3+ doped ceria reveals a decreased activity compared with un-doped ceria. We believe that the Cu2+-doped CeO2 with superior catalytic performance can also be applied to other catalytic systems.

Graphical abstract: Fabrication of homogeneously Cu2+/La3+-doped CeO2 nanosheets and their application in CO oxidation

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Publication details

The article was received on 28 Jan 2017, accepted on 13 Apr 2017 and first published on 13 Apr 2017


Article type: Paper
DOI: 10.1039/C7TA00924K
Citation: J. Mater. Chem. A, 2017,5, 9717-9722
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    Fabrication of homogeneously Cu2+/La3+-doped CeO2 nanosheets and their application in CO oxidation

    X. Zhou, J. Ling, W. Sun and Z. Shen, J. Mater. Chem. A, 2017, 5, 9717
    DOI: 10.1039/C7TA00924K

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