Effect of the dielectric barrier discharge plasma on Cu-based catalysts supported on SiO2 for acetylene hydration

IF 3.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Molecular Catalysis Pub Date : 2025-03-29 DOI:10.1016/j.mcat.2025.115064

Yi Cui, Xiejie Chen, Jiaxuan Gao, Shui Liu, Denghao Wang, Caixia Xu

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Abstract

Enhancing the catalytic performance of acetylene hydration catalysts remains a formidable challenge in current research. SiO₂ was firstly employed as a support to synthesize Cu-based catalysts by dielectric barrier discharge plasma for the acetylene hydration reaction, achieving an impressive conversion of 95.9 % for acetylene and selectivity of 83.6 % for acetaldehyde within 8 h reaction time. The selectivity exhibits a relatively consistent stability within 30 h of reaction time. According to X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), plasma treatment promotes the interaction between the active component and the support, which can enhance the anti-reduction properties of active copper components. Transmission electron microscopy (TEM) and acetylene temperature-programmed desorption (C₂H₂-TPD) reveal that plasma treatment markedly improves the dispersion of Cu species and enhances the acetylene adsorption capacity, thereby leading to an improvement in catalytic performance.

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来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods