The nature of K-induced 2H and 1T’-MoS2 species and their phase transition behavior for the synthesis of methanethiol (CH3SH)
Zhizhi Xu,
Jian Fang,
Jichang Lu,
Dedong He,
Sufang He,
Yongming Luo
Affiliations
Zhizhi Xu
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China; Yunnan Research Academy of Eco-environmental Sciences, Kunming 650093, P. R. China; The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
Jian Fang
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650050, P.R. China; The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
Jichang Lu
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650050, P.R. China; The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China; Corresponding author
Dedong He
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China; The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
Sufang He
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650050, P.R. China; The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China
Yongming Luo
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China; Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650050, P.R. China; The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, P. R. China; The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, P. R. China; Corresponding author
Summary: The one-step reaction approach from syngas with hydrogen sulfide (CO/H2/H2S) over potassium (K) promoted Molybdenum disulfide (MoS2) materials can provide alternatives for the synthesis of methanethiol (CH3SH). However, the direct confirmation and determination of the real active nature of K-induced 2H and 1T′-MoS2 for this reaction and the corresponding phase transformation behavior and origin of K-induced 2H-MoS2 from/to 1T′-MoS2 remains unclear. Herein, we proved at the atomic level the precise position of K over 1T′-MoS2 and 2H-MoS2 species using the technique of HAADF-STEM. A relationship between K-induced 1T′ and 2H-MoS2 phases and the catalytic property to synthesize CH3SH was established, and K-intercalated 1T′-MoS2 phase was confirmed to have excellent catalytic performances. Moreover, the behavior, origin, and influencing factors of phase transformation of 2H-MoS2 from/to 1T′-MoS2 in the existence of K were well proved.
