Molybdenum sulfide embedded mesoporous N-Doped carbon as a noble metal-free highly selective catalyst for conversion of CO2 to CO

Transition metal chalcogenides, phosphides, and carbides are highly replaceable active materials to precious metals in various applications. Successful incorporation of sulfur in the form of molybdenum sulfide into mesoporous N-Doped carbon was achieved by a two-step sequential synthesis approach using Molybdenum doped SBA-15 as a template. The characteristics and adsorptive CO2 conversion to CO activity of the MoS2/CNX catalysts are investigated, and its activity is compared to MoO3/SBA15 and MoO3/CNX catalysts. Different compositional catalysts were exposed to the mixture of CO2 and hydrogen to validate the catalyst activity, and 2.5 MoS2/CNX is found to be very efficient and stable up to 85 h with 52% CO2 conversion and 99% selectivity towards CO due to the presence of a higher number of bridging S22- mode and its sulfur vacancies.

Automated summary

Transition metal chalcogenides, phosphides, and carbides can serve as highly replaceable active materials in various applications instead of precious metals. This study successfully incorporated sulfur in the form of molybdenum sulfide into mesoporous N-Doped carbon, and investigated the characteristics and CO2 conversion activity of MoS2/CNX catalysts, comparing them to MoO3/SBA15 and MoO3/CNX catalysts. The 2.5 MoS2/CNX catalyst showed high efficiency and stability with 52% CO2 conversion and 99% selectivity towards CO due to the presence of a higher number of bridging S22- mode and its sulfur vacancies.