One-step electric-field driven methane and formaldehyde synthesis from liquid methanol

Area of Science:

• Catalysis and Reaction Engineering
• Physical Chemistry
• Computational Chemistry

Background:

• Methanol conversion is crucial for energy and synthesis.
• The simultaneous conversion of methanol to methane and formaldehyde (disproportionation) is a fundamental yet unachieved reaction.
• Understanding methanol's reaction pathways is key in bio- and geo-chemistry.

Purpose of the Study:

• To achieve the one-pot synthesis of methane and formaldehyde from methanol.
• To investigate the mechanism of methanol disproportionation under external stimuli.
• To explore the role of electric fields and solvent effects in chemical reactions.

Main Methods:

• *Ab initio* molecular dynamics simulations.
• Free-energy calculations.
• Application of static electric fields to liquid methanol.

Main Results:

• Simultaneous oxidation and reduction of methanol into methane and formaldehyde achieved at ambient temperature.
• Demonstrated the feasibility of experimentally inducing methanol disproportionation using static electric fields.
• Identified a significant role for methanol solvent molecules in the reaction pathway.
• Revealed that the liquid-phase reaction pathway differs substantially from the gas-phase counterpart.
• Showed that electric fields alter the methanol reaction network, reducing activation barriers and stabilizing products.

Conclusions:

• Static electric fields can enable the simultaneous conversion of methanol to methane and formaldehyde.
• Methanol's solvent environment critically influences the reaction mechanism.
• This work provides a pathway for experimental investigation of methanol disproportionation.
• Electric field application offers a novel strategy for controlling chemical reactivity and synthesis.