Abstract
AbstractDefect engineering is often used to improve the performance of catalysts. Here, plasma etching was first used as a strategy to introduce defects to modify the phosphotungstic acid‐based ionic liquids (C14PWIL) catalyst for oxidative desulfurization (ODS) in fuel. The valence band/conduction band value of the catalyst indicates that the formation of oxygen vacancies plays an essential role in enhancing the oxidation capacity. In combination with X‐ray photoelectron spectroscopy results, the enriched electrons in the oxygen vacancies can increase the electron density on the catalyst surface, which promotes the electron migration process between the catalyst and H2O2, thus favoring the activation of H2O2 and enabling an efficient ODS process. The desulfurization efficiency of C14PWIL‐P at room temperature is 3 times that of C14PWIL, which exhibits good cycling stability.
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