In this section, you can access to the latest technical information related to the FUTURE project topic.

Efficient CH3OH formation on H2/Ar plasma?treated CoO sites for CO2?+?H2?+?H2O DBD system

Upon the interactions between nonthermal plasma (NTP) and CoO?based nanocatalysts, the hydrogenation synergy of CO2 into CH3OH was investigated. The H2O additive provided a large quantity of OH/H radicals, and the plasma?treated H2/Ar?CoO with abundant oxygen vacancy (Ov) could accelerate the surface adsorption of O?containing radicals, thus obtaining the maximum CH3OH selectivity (39.6%). It is pointed out that the coexistence of H2O with Ov?rich catalysts was an efficient strategy to enhance CH3OH generation for plasma?enabled CO2 hydrogenation.Packing heterogeneous catalysts to achieve a better plasma?catalyst synergy is critical to promoting CO2 conversion into high?value chemicals. Herein, a series of CoO?based catalysts were synthesized, and the treated H2/Ar?CoO possessed the highest CH3OH selectivity (39.6%) in the?CO2?+?H2?+?H2O system, about four times higher than the initial CoO (10.0%). Systemic characterizations showed that H2/Ar plasma treatment significantly increased the oxygen vacancy (Ov) concentration of H2/Ar?CoO by Ar+ bombardment and synchronous H reduction. Considering the key role of CH3O on CH3OH generation upon kinetic simulations, we proposed that the Ov in H2/Ar?CoO could accelerate the CH3O/OH adsorption and further recombine with H/CH3, in which the H2O provided abundant OH/H radicals via electron?impact process. This study highlighted the importance of using H2O with Ov?rich catalysts for plasma?enabled CH3OH synthesis.

» Author: Jie Pan, Bin Li, Liguang Dou, Yuan Gao, Pengchen He, Tao Shao

» Publication Date: 05/07/2023

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