In a research printed in Nature Communications, a analysis group led by Prof. Deng Dehui, Assoc. Prof. Cui Xiaoju, and Prof. Yu Liang from the Dalian Institute of Chemical Physics (DICP) of the Chinese language Academy of Sciences has achieved extremely environment friendly photo-driven carbonylation of methane (CH4) with carbonic oxide (CO) and oxygen (O2) to acetic acid (CH3COOH) utilizing a nano-heterostructure catalyst.
This catalyst options Rh-Zn atomic-pair twin websites confined inside a MoS2 lattice, built-in with TiO2 nanoparticles. This progressive catalyst allows a CH3COOH productiveness of 152 μmol gcat.-1 h-1, and a turnover frequency of 62 h-1 with a excessive selectivity of 96.5%.
The direct conversion of CH4 to excessive worth multi-carbon (C2+) oxygenates, corresponding to CH3COOH, underneath delicate circumstances presents a promising pathway for upgrading pure gasoline to transportable liquid chemical compounds.
The oxidative carbonylation of CH4 with CO and O2 to CH3COOH underneath delicate circumstances is a beautiful and environmentally pleasant route for CH4 utilization. Nonetheless, this course of entails complicated reactions, together with the activation of O2, environment friendly CH4 activation, and controllable C–C coupling. It is subsequently a significant problem to attain CH4, CO, and O2 to CH3COOH with each excessive catalytic exercise and selectivity for delicate CH4 conversion.
On this research, the researchers confirmed that the energetic OH species, generated from O2 photoreduction on the Zn website by proton-coupled electron switch, promote CH4 dissociation to CH3 species. These CH3 species then simply couple with adsorbed CO on the adjoining Rh website, resulting in extremely selective CH3COOH formation.
Moreover, the twin Rh–Zn atomic-pair websites present separate catalytic websites for C–H activation and C–C coupling, making a synergistic impact that overcomes the standard trade-off between exercise and selectivity in CH4 carbonylation.
“Our research opens up a brand new horizon for the design of environment friendly catalysts and supplies a brand new pathway for photo-driven CH4 carbonylation to CH3COOH,” stated Prof. Deng.
Extra data:
Yanan Li et al, MoS2-confined Rh-Zn atomic pair boosts photo-driven methane carbonylation to acetic acid, Nature Communications (2025). DOI: 10.1038/s41467-024-54061-z
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Atomic pair catalyst converts methane to acetic acid with excessive effectivity (2025, January 21)
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