Biomimetic CO oxidation below −100 °C by a nitrate-containing metal-free microporous system

Konstantin Khivantsev (), Nicholas R. Jaegers, Hristiyan A. Aleksandrov (), Libor Kovarik, Miroslaw A. Derewinski, Yong Wang, Georgi N. Vayssilov and Janos Szanyi ()
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Konstantin Khivantsev: Pacific Northwest National Laboratory
Nicholas R. Jaegers: Pacific Northwest National Laboratory
Hristiyan A. Aleksandrov: Faculty of Chemistry and Pharmacy, University of Sofia
Libor Kovarik: Pacific Northwest National Laboratory
Miroslaw A. Derewinski: Pacific Northwest National Laboratory
Yong Wang: Pacific Northwest National Laboratory
Georgi N. Vayssilov: Faculty of Chemistry and Pharmacy, University of Sofia
Janos Szanyi: Pacific Northwest National Laboratory

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract CO oxidation is of importance both for inorganic and living systems. Transition and precious metals supported on various materials can oxidize CO to CO2. Among them, few systems, such as Au/TiO2, can perform CO oxidation at temperatures as low as −70 °C. Living (an)aerobic organisms perform CO oxidation with nitrate using complex enzymes under ambient temperatures representing an essential pathway for life, which enables respiration in the absence of oxygen and leads to carbonate mineral formation. Herein, we report that CO can be oxidized to CO2 by nitrate at −140 °C within an inorganic, nonmetallic zeolitic system. The transformation of NOx and CO species in zeolite as well as the origin of this unique activity is clarified using a joint spectroscopic and computational approach.

Date: 2021
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DOI: 10.1038/s41467-021-26157-3

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