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Modulating the methanation activity of Ni by the crystal phase of TiO2

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Abstract

We demonstrate that the methanation activity of Ni catalysts is modulated by the crystal phase of the TiO2 support. The rutile TiO2 (r-TiO2)-supported Ni catalyst gives a turnover frequency almost two orders of magnitude higher than the anatase TiO2 (a-TiO2)-supported catalyst although the two catalysts exhibit a similar mean Ni particle size. Characterization by H2-TPR, H2-TPD, XPS and IR reveals a stronger interaction between Ni and r-TiO2, leading to a higher capability of CO activation and hydrogenation activity of Ni although Ni is partially covered by TiOx overlayers during reaction. Interestingly, the modulating effects of the titania crystal phases are much more pronounced on the activity of Ni in CO2 methanation.

Graphical abstract: Modulating the methanation activity of Ni by the crystal phase of TiO2

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Publication details

The article was received on 20 Jan 2017, accepted on 17 May 2017 and first published on 05 Jun 2017


Article type: Paper
DOI: 10.1039/C7CY00124J
Citation: Catal. Sci. Technol., 2017, Advance Article
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    Modulating the methanation activity of Ni by the crystal phase of TiO2

    Y. Lin, Y. Zhu, X. Pan and X. Bao, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY00124J

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