CO2 Conversion Synergistically Driven by Radiofrequency Inductively-Coupled Plasma and Lead-Free Halide Perovskite Photocatalyst

Abstract

The conversion and utilization of carbon dioxide (CO2) driven by plasma are promising approaches to achieve the mitigation of the greenhouse effect. In this paper, for the first time, the integration of radiofrequency inductively coupled plasma (RF-ICP) and lead-free halide perovskite photocatalysts was investigated to facilitate the CO2 conversion. The photocatalyst could be modified by the plasma to improve the catalytic activity of the surface, while the photons and vibrationally excited molecules also promote the CO2 conversion in plasma. Compared with the presence of Cu, SiO2, and Cs2TeCl6@SiO2, the radiofrequency plasma filled with Cs2TeCl6@Cu exhibited the best CO2 conversion ratio of 86.5% at a specific energy of 30 eV/molecule, which is much higher than the work reported previously. This work demonstrates that the synergistic effect between RF-ICP and the photocatalyst could effectively improve the reaction efficiency, providing a new opportunity for efficient CO2 conversion in future large-scale practical application.