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2D lattice-confined Cu atoms allow room-temperature methane conversion


2D lattice-confined Cu atoms enable room-temperature methane conversion
Graphical summary. Credit score: Chem Catalysis (2022). DOI: 10.1016/j.checat.2022.07.025

Methane, as the principle element of shale gasoline, pure gasoline and flamable ice, is among the many most promising vitality sources for producing high-value chemical substances. Nevertheless, it’s nonetheless difficult to activate methane beneath gentle situations because of the excessive symmetry and low polarizability of methane molecules.

Lately, a analysis group led by Prof. Deng Dehui and Assoc. Prof. Yu Liang from the Dalian Institute of Chemical Physics (DICP) of the Chinese language Academy of Sciences (CAS) achieved extremely environment friendly methane conversion to liquid C1 oxygenates over ultrathin two-dimensional (2D) Ru nanosheets with lattice-confined Cu atoms.

This research was printed in Chem Catalysis on August 24.

Ultrathin 2D metallic nanosheets are promising matrix supplies for creating energetic facilities for the methane activation by confining heteroatoms within the lattice. Nevertheless, the barely controllable tailoring of the coordination setting for the confined heteroatoms within the 2D nanosheets makes it difficult for the development of efficient energetic websites for methane activation.

On this research, the researchers developed the catalysts by confining Cu atoms in ultrathin 2D metallic Ru nanosheets by means of a novel technique of noble metal-induced discount mechanism, which enabled a extremely selective methane conversion to liquid C1 oxygenates beneath room temperature.

By exactly adjusting the content material of the confined Cu atoms to optimize their coordination setting, they achieved the manufacturing of liquid C1 oxygenates (CH3OOH and CH3OH) over the Ru11Cu catalyst to a most of 1533 mmol g-1Cu(surf.)h-1 with an over 99% selectivity utilizing H2O2 because the oxidant.

A number of and first-principles calculations revealed that bi-coordinated bridge-site oxygen species generated on the Ru edge-confined Cu websites might facilely dissociate the C-H bond of methane with a reasonably low vitality barrier, and thus enabled the conversion at room temperature through a free radical mechanism.

“This research gives a technique for designing environment friendly catalysts by developing edge-confined energetic facilities in metallic nanosheets for the activation of C-H bonds in gentle alkanes,” mentioned Prof. Deng.


Researchers convert methane to formic acid at excessive effectivity beneath gentle situations


Extra info:
Jinchang Fan et al, Boosting room-temperature conversion of methane through confining Cu atoms in ultrathin Ru nanosheets, Chem Catalysis (2022). DOI: 10.1016/j.checat.2022.07.025

Quotation:
2D lattice-confined Cu atoms allow room-temperature methane conversion (2022, August 30)
retrieved 30 August 2022
from https://phys.org/information/2022-08-2nd-lattice-confined-cu-atoms-enable.html

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