Boosting CO Conversion by Synergy of Lead-Free Perovskite CsSnCl and Plasma with HO.

Although dielectric barrier discharge (DBD) plasma is a promising technique for CO conversion, realizing CO-to-alcohol is still challenging via the use of HO. Herein, for the first time, efficient CO conversion was achieved via the synergism between the CsSnCl photocatalyst and DBD plasma assisted by HO. The CO conversion ratio of plasma photocatalysis was 6.5% higher than that of only the plasma and photocatalysis, implying that the synergism of plasma catalysis and photocatalysis was achieved. Furthermore, the DBD plasma assisted by the CsSnCl photocatalyst could convert CO and HO to CO and a small amount of methanol and ethanol. The CO conversion ratio was enhanced by 50.6% in the presence of HO, which was attributed to the improvement of charge transfer due to the increased electrical conductivity of the photocatalyst surface during plasma discharge. This work provides a new idea for developing an efficient system for CO utilization.