文献类型：期刊文献

英文题名：Enhancing CO2 hydrogenation to methanol via the synergistic effect of MoS2 interlayer spacing and sulfur vacancies

作者：Qin, Langlang[1];Gao, Yunfei[2];Han, Caiyun[1];Zhu, Minghui[4];Wang, Shuang[1,3]

机构：[1]Taiyuan Univ Technol, Coll Environm Sci & Engn, Jinzhong 030600, Shanxi, Peoples R China;[2]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[3]Taiyuan Univ Technol, Shanxi Key Lab Gas Energy Efficient & Clean Utiliz, Taiyuan 030024, Shanxi, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：12

期号：31

起止页码：20107

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20242916727448);WOS:【SCI-EXPANDED(收录号:WOS:001272332200001)】；

基金：The present work is financially supported by the National Natural Science Foundation of China (grant numbers 22078215 and 22208104) and Research Project by Shanxi Scholarship Council of China (grant number 2021-055).

语种：英文

外文关键词：Catalysts - Hydrogenation - Layered semiconductors - Methanol - Molybdenum compounds - Nitrogen compounds - Sulfur dioxide

摘要：The hydrogenation of carbon dioxide (CO2) to methanol is an important reaction to convert CO2 into valuable products and reduce carbon emission. MoS2 is an effective catalyst for CO2 hydrogenation, but the synergistic effects of interlayer spacing expansion and surface sulfur vacancy strengthening have not been studied systematically. Here, this work reports hydrazine hydrate as an effective reducing agent for MoS2. The reducing agent can not only expand the interlayer spacing of MoS2, but also increase the concentration of sulfur vacancies through a simple treatment. More importantly, the synergistic effect between the interlayer spacing and sulfur vacancies of MoS2 significantly increases the methanol space-time yield (STY). At 220 degrees C, 4 MPa, and 8000 mL g(cat)(-1) h(-1), the MoS2-N2H4-4 catalyst exhibits 76.8% methanol selectively, 5.52% CO2 conversion, and a high methanol STY of up to 0.1214 g g(cat)(-1) h(-1) and lasts for at least 200 h. The structure-performance relationship was further studied using physio-chemical characterization and DFT. These results provide valuable insights into the development of highly efficient MoS2 catalysts for CO2 hydrogenation.