biostudies-literatureXu ZTen Thousand Talent Plans for Young Top-notch Talents of Yunnan ProvinceNatural Science Foundation of Yunnan ProvinceNational Natural Science Foundation of ChinaApplied Basic Research Foundation of Yunnan Province104999https://www.ebi.ac.uk/biostudies/studies/S-EPMC9463583biostudies-literatureUnknown25(9)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.iScienceThe nature of K-induced 2H and 1T'-MoS₂ species and their phase transition behavior for the synthesis of methanethiol (CH₃SH).PMC9463583202105AE160019202101AU07002522106055202101AS070026202201AT07008642030712202101BE070001-02621966018YNWR-QNBJ-2018-067He SFang JHe DLu JLuo YXu ZfalseThe nature of K-induced 2H and 1T'-MoS₂ species and their phase transition behavior for the synthesis of methanethiol (CH₃SH).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.2022-01-01T00:00:00Z2022 Sep2026-03-31T11:26:00.148Z2025-04-07T09:34:35.556ZS-EPMC94635833609761610.1016/j.isci.2022.104999