The nature of K-induced 2H and 1T'-MoS₂ species and their phase transition behavior for the synthesis of methanethiol (CH₃SH).

ABSTRACT: 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.

SUBMITTER: Xu Z 

PROVIDER: S-EPMC9463583 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature