| Summary: | Carbon dioxide (CO<sub>2</sub>) and hydrogen sulfide (H<sub>2</sub>S) ordinarily coexist in many industries, being considered as harmful waste gases. Simultaneously converting CO<sub>2</sub> and H<sub>2</sub>S into syngas (a mixture of CO and H<sub>2</sub>) will be a promising economic strategy for enhancing their recycling value. Herein, a novel one-step conversion of CO<sub>2</sub> and H<sub>2</sub>S to syngas induced by non-thermal plasma with the aid of Ni-Mo sulfide/Al<sub>2</sub>O<sub>3</sub> catalyst under ambient conditions was designed. The as-synthesized catalysts were characterized by using XRD, nitrogen sorption, UV-vis, TEM, SEM, ICP, and XPS techniques. Ni-Mo sulfide/Al<sub>2</sub>O<sub>3</sub> catalysts with various Ni/Mo molar ratios possessed significantly improved catalytic performances, compared to the single-component catalysts. Based on the modifications of the physical and chemical properties of the Ni-Mo sulfide/Al<sub>2</sub>O<sub>3</sub> catalysts, the variations in catalytic activity are carefully discussed. In particular, among all the catalysts, the 5Ni-3Mo/Al<sub>2</sub>O<sub>3</sub> catalyst exhibited the best catalytic behavior with high CO<sub>2</sub> and H<sub>2</sub>S conversion at reasonably low-energy input in non-thermal plasma. This method provides an alternative route for syngas production with added environmental and economic benefits.
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