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Issue 21, 2016
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Support morphology and crystal plane effect of Cu/CeO2 nanomaterial on the physicochemical and catalytic properties for carbonate hydrogenation

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Abstract

The present work determined the morphology and crystal plane effects of nanoceria on the activity of Cu/CeO2 catalysts in the gas/solid-phase hydrogenation of CO2-derived diethyl carbonate (DEC) to methanol. The effect of the terminating crystalline planes of CeO2 ({100}, {110}, and {111}) on the behaviour of copper species dispersed over CeO2 nanocubes, nanorods and nanoparticles was examined in detail using a variety of characterization techniques. HRTEM studies revealed that CeO2 nanorods were mainly enclosed by {100} and {110} planes, nanoparticles exhibited only {111} surfaces, and nanocubes predominantly displayed {100} planes. Cu/CeO2 nanorods (Cu/Ce-NR) possessed higher Cu+/Cu0 ratios and more oxygen vacancies than Cu/CeO2 nanoparticles (Cu/Ce-NP) and Cu/CeO2 nanocubes (Cu/Ce-NC), which indicated that there was a stronger interaction between Cu and CeO2 nanorods. A test of activity in the hydrogenation of DEC showed that Cu/Ce-NR was more active than Cu/Ce-NP and Cu/Ce-NC, which could be attributed to the higher value of SCu0, surface oxygen mobility and Cu+/Cu0 ratio. These results confirm that the activity of Cu/CeO2 catalysts for the hydrogenation of DEC is greatly affected by the shape/crystal planes of CeO2.

Graphical abstract: Support morphology and crystal plane effect of Cu/CeO2 nanomaterial on the physicochemical and catalytic properties for carbonate hydrogenation

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Publication details

The article was received on 22 Jul 2016, accepted on 15 Sep 2016 and first published on 16 Sep 2016


Article type: Paper
DOI: 10.1039/C6CY01575A
Citation: Catal. Sci. Technol., 2016,6, 7752-7762
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    Support morphology and crystal plane effect of Cu/CeO2 nanomaterial on the physicochemical and catalytic properties for carbonate hydrogenation

    Y. Cui and W. Dai, Catal. Sci. Technol., 2016, 6, 7752
    DOI: 10.1039/C6CY01575A

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