Issue 6, 2024

High activity in the dry reforming of methane using a thermally switchable double perovskite and in situ generated molecular level nanocomposite

Abstract

This work emphasizes the dry reforming of methane (DRM) reaction on citrate sol–gel-synthesized double perovskite oxides. Phase pure La2NiMnO6 shows very impressive DRM activity with H2/CO = 0.9, hence revealing a high prospect of next-generation catalysts. Although the starting double perovskite phase gets degraded into mostly binary oxide phases after a few hours of DRM activity, the activity continues up to 100 h. The regeneration of the original double perovskite out of decomposed phases by annealing at near synthesis temperature, followed by the spectacular retention of activity, is rather interesting and hitherto unreported. This result unravels unique reversible thermal switching between the original double perovskite phase and decomposed phases during DRM without compromising the activity and raises challenge to understand the role of decomposed phases evolved during DRM. We have addressed this unique feature of the catalyst via structure–property relationship using the in situ generated molecular level nanocomposite.

Graphical abstract: High activity in the dry reforming of methane using a thermally switchable double perovskite and in situ generated molecular level nanocomposite

Supplementary files

Article information

Article type
Paper
Submitted
12 Nov 2023
Accepted
13 Dec 2023
First published
03 Jan 2024

Phys. Chem. Chem. Phys., 2024,26, 5447-5465

High activity in the dry reforming of methane using a thermally switchable double perovskite and in situ generated molecular level nanocomposite

A. Hossain, M. Bhattacharjee, K. Ghorai, J. Llorca, M. Vasundhara, S. Roy, P. Bera, Md. M. Seikh and A. Gayen, Phys. Chem. Chem. Phys., 2024, 26, 5447 DOI: 10.1039/D3CP05494B

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