Understanding the effect of spatially separated Cu and acid sites in zeolite catalysts on oxidation of methane

Peipei Xiao, Yong Wang, Lizhuo Wang, Hiroto Toyoda, Kengo Nakamura, Samya Bekhti, Yao Lu, Jun Huang, Hermann Gies and Toshiyuki Yokoi ()
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Peipei Xiao: Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku
Yong Wang: Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku
Lizhuo Wang: The University of Sydney
Hiroto Toyoda: Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku
Kengo Nakamura: Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku
Samya Bekhti: Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku
Yao Lu: Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku
Jun Huang: The University of Sydney
Hermann Gies: Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku
Toshiyuki Yokoi: Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Unraveling the effect of spatially separated bifunctional sites on catalytic reactions is significant yet challenging. In this report, we investigate the role of spatial separation on the oxidation of methane in a series of Cu-exchanged aluminosilicate zeolites. Regulation of the bifunctional sites is done either through studying a physical mixture of Cu-exchanged zeolites and acidic zeolites or by systematically varying the Cu and acid density within a family of zeolite materials. We show that separated Cu and acid sites are beneficial for the formation of hydrocarbons while high-density Cu sites, which are closer together, facilitate the production of CO2. By contrast, a balance of the spatial separation of Cu and acid sites shows more favorable formation of methanol. This work will further guide approaches to methane oxidation to methanol and open an avenue for promoting hydrocarbon synthesis using methanol as an intermediate.

Date: 2024
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DOI: 10.1038/s41467-024-46924-2

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