Strained few-layer MoS2 with atomic copper and selectively exposed in-plane sulfur vacancies for CO2 hydrogenation to methanol
Abstract In-plane sulfur vacancies (Sv) in molybdenum disulfide (MoS2) were newly unveiled for CO2 hydrogenation to methanol, whereas edge Sv were found to facilitate methane formation. Thus, selective exposure and activation of basal plane is crucial for methanol synthesis. Here, we report a mesopo...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-09-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-41362-y |
| _version_ | 1827709626108346368 |
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| author | Shenghui Zhou Wenrui Ma Uzma Anjum Mohammadreza Kosari Shibo Xi Sergey M. Kozlov Hua Chun Zeng |
| author_facet | Shenghui Zhou Wenrui Ma Uzma Anjum Mohammadreza Kosari Shibo Xi Sergey M. Kozlov Hua Chun Zeng |
| author_sort | Shenghui Zhou |
| collection | DOAJ |
| description | Abstract In-plane sulfur vacancies (Sv) in molybdenum disulfide (MoS2) were newly unveiled for CO2 hydrogenation to methanol, whereas edge Sv were found to facilitate methane formation. Thus, selective exposure and activation of basal plane is crucial for methanol synthesis. Here, we report a mesoporous silica-encapsulated MoS2 catalysts with fullerene-like structure and atomic copper (Cu/MoS2@SiO2). The main approach is based on a physically constrained topologic conversion of molybdenum dioxide (MoO2) to MoS2 within silica. The spherical curvature enables the generation of strain and Sv in inert basal plane. More importantly, fullerene-like structure of few-layer MoS2 can selectively expose in-plane Sv and reduce the exposure of edge Sv. After promotion by atomic copper, the resultant Cu/MoS2@SiO2 exhibits stable specific methanol yield of 6.11 molMeOH molMo –1 h–1 with methanol selectivity of 72.5% at 260 °C, much superior to its counterparts lacking the fullerene-like structure and copper decoration. The reaction mechanism and promoting role of copper are investigated by in-situ DRIFTS and in-situ XAS. Theoretical calculations demonstrate that the compressive strain facilitates Sv formation and CO2 hydrogenation, while tensile strain accelerates the regeneration of active sites, rationalizing the critical role of strain. |
| first_indexed | 2024-03-10T17:24:36Z |
| format | Article |
| id | doaj.art-9f52f9a12c0d48fa890078084d71390a |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-10T17:24:36Z |
| publishDate | 2023-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-9f52f9a12c0d48fa890078084d71390a2023-11-20T10:13:14ZengNature PortfolioNature Communications2041-17232023-09-0114111510.1038/s41467-023-41362-yStrained few-layer MoS2 with atomic copper and selectively exposed in-plane sulfur vacancies for CO2 hydrogenation to methanolShenghui Zhou0Wenrui Ma1Uzma Anjum2Mohammadreza Kosari3Shibo Xi4Sergey M. Kozlov5Hua Chun Zeng6Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of SingaporeDepartment of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of SingaporeDepartment of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of SingaporeDepartment of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of SingaporeInstitute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR)Department of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of SingaporeDepartment of Chemical and Biomolecular Engineering, College of Design and Engineering, National University of SingaporeAbstract In-plane sulfur vacancies (Sv) in molybdenum disulfide (MoS2) were newly unveiled for CO2 hydrogenation to methanol, whereas edge Sv were found to facilitate methane formation. Thus, selective exposure and activation of basal plane is crucial for methanol synthesis. Here, we report a mesoporous silica-encapsulated MoS2 catalysts with fullerene-like structure and atomic copper (Cu/MoS2@SiO2). The main approach is based on a physically constrained topologic conversion of molybdenum dioxide (MoO2) to MoS2 within silica. The spherical curvature enables the generation of strain and Sv in inert basal plane. More importantly, fullerene-like structure of few-layer MoS2 can selectively expose in-plane Sv and reduce the exposure of edge Sv. After promotion by atomic copper, the resultant Cu/MoS2@SiO2 exhibits stable specific methanol yield of 6.11 molMeOH molMo –1 h–1 with methanol selectivity of 72.5% at 260 °C, much superior to its counterparts lacking the fullerene-like structure and copper decoration. The reaction mechanism and promoting role of copper are investigated by in-situ DRIFTS and in-situ XAS. Theoretical calculations demonstrate that the compressive strain facilitates Sv formation and CO2 hydrogenation, while tensile strain accelerates the regeneration of active sites, rationalizing the critical role of strain.https://doi.org/10.1038/s41467-023-41362-y |
| spellingShingle | Shenghui Zhou Wenrui Ma Uzma Anjum Mohammadreza Kosari Shibo Xi Sergey M. Kozlov Hua Chun Zeng Strained few-layer MoS2 with atomic copper and selectively exposed in-plane sulfur vacancies for CO2 hydrogenation to methanol Nature Communications |
| title | Strained few-layer MoS2 with atomic copper and selectively exposed in-plane sulfur vacancies for CO2 hydrogenation to methanol |
| title_full | Strained few-layer MoS2 with atomic copper and selectively exposed in-plane sulfur vacancies for CO2 hydrogenation to methanol |
| title_fullStr | Strained few-layer MoS2 with atomic copper and selectively exposed in-plane sulfur vacancies for CO2 hydrogenation to methanol |
| title_full_unstemmed | Strained few-layer MoS2 with atomic copper and selectively exposed in-plane sulfur vacancies for CO2 hydrogenation to methanol |
| title_short | Strained few-layer MoS2 with atomic copper and selectively exposed in-plane sulfur vacancies for CO2 hydrogenation to methanol |
| title_sort | strained few layer mos2 with atomic copper and selectively exposed in plane sulfur vacancies for co2 hydrogenation to methanol |
| url | https://doi.org/10.1038/s41467-023-41362-y |
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