@Article{catal10080856,
AUTHOR = {Ronge, Emanuel and Hildebrandt, Sonja and Grutza, Marie-Luise and Klein, Helmut and Kurz, Philipp and Jooss, Christian},
TITLE = {Structure of Nanocrystalline, Partially Disordered MoS2+δ Derived from HRTEM—An Abundant Material for Efficient HER Catalysis},
JOURNAL = {Catalysts},
VOLUME = {10},
YEAR = {2020},
NUMBER = {8},
ARTICLE-NUMBER = {856},
URL = {https://www.mdpi.com/2073-4344/10/8/856},
ISSN = {2073-4344},
ABSTRACT = {Molybdenum sulfides (MoSx, x > 2) are promising catalysts for the hydrogen evolution reaction (HER) that show high hydrogen evolution rates and potentially represent an abundant alternative to platinum. However, a complete understanding of the structure of the most active variants is still lacking. Nanocrystalline MoS2+δ was prepared by a solvothermal method and immobilized on graphene. The obtained electrodes exhibit stable HER current densities of 3 mA cm−2 at an overpotential of ~200 mV for at least 7 h. A structural analysis of the material by high-resolution transmission electron microscopy (HRTEM) show partially disordered nanocrystals of a size between 5–10 nm. Both X-ray and electron diffraction reveal large fluctuations in lattice spacing, where the average c-axis stacking is increased and the in-plane lattice parameter is locally reduced in comparison to the layered structure of crystalline MoS2. A three-dimensional structural model of MoS2+δ could be derived from the experiments, in which [Mo2S12]2− and [Mo3S13]2− clusters as well as disclinations represent the typical defects in the ideal MoS2 structure. It is suggested that the partially disordered nanostructure leads to a high density of coordinatively modified Mo sites with lower Mo–Mo distances representing the active sites for HER catalysis, and, that these structural features are more important than the S:Mo ratio for the activity.},
DOI = {10.3390/catal10080856}
}

{"_id":"ny538JezjPk63iRiY","bibbaseid":"ronge-hildebrandt-grutza-klein-kurz-jooss-structureofnanocrystallinepartiallydisorderedmos2derivedfromhrtemanabundantmaterialforefficienthercatalysis-2020","author_short":["Ronge, E.","Hildebrandt, S.","Grutza, M.","Klein, H.","Kurz, P.","Jooss, C."],"bibdata":{"bibtype":"article","type":"article","author":[{"propositions":[],"lastnames":["Ronge"],"firstnames":["Emanuel"],"suffixes":[]},{"propositions":[],"lastnames":["Hildebrandt"],"firstnames":["Sonja"],"suffixes":[]},{"propositions":[],"lastnames":["Grutza"],"firstnames":["Marie-Luise"],"suffixes":[]},{"propositions":[],"lastnames":["Klein"],"firstnames":["Helmut"],"suffixes":[]},{"propositions":[],"lastnames":["Kurz"],"firstnames":["Philipp"],"suffixes":[]},{"propositions":[],"lastnames":["Jooss"],"firstnames":["Christian"],"suffixes":[]}],"title":"Structure of Nanocrystalline, Partially Disordered MoS2+δ Derived from HRTEM—An Abundant Material for Efficient HER Catalysis","journal":"Catalysts","volume":"10","year":"2020","number":"8","article-number":"856","url":"https://www.mdpi.com/2073-4344/10/8/856","issn":"2073-4344","abstract":"Molybdenum sulfides (MoSx, x > 2) are promising catalysts for the hydrogen evolution reaction (HER) that show high hydrogen evolution rates and potentially represent an abundant alternative to platinum. However, a complete understanding of the structure of the most active variants is still lacking. Nanocrystalline MoS2+δ was prepared by a solvothermal method and immobilized on graphene. The obtained electrodes exhibit stable HER current densities of 3 mA cm−2 at an overpotential of  200 mV for at least 7 h. A structural analysis of the material by high-resolution transmission electron microscopy (HRTEM) show partially disordered nanocrystals of a size between 5–10 nm. Both X-ray and electron diffraction reveal large fluctuations in lattice spacing, where the average c-axis stacking is increased and the in-plane lattice parameter is locally reduced in comparison to the layered structure of crystalline MoS2. A three-dimensional structural model of MoS2+δ could be derived from the experiments, in which [Mo2S12]2− and [Mo3S13]2− clusters as well as disclinations represent the typical defects in the ideal MoS2 structure. It is suggested that the partially disordered nanostructure leads to a high density of coordinatively modified Mo sites with lower Mo–Mo distances representing the active sites for HER catalysis, and, that these structural features are more important than the S:Mo ratio for the activity.","doi":"10.3390/catal10080856","bibtex":"@Article{catal10080856,\r\nAUTHOR = {Ronge, Emanuel and Hildebrandt, Sonja and Grutza, Marie-Luise and Klein, Helmut and Kurz, Philipp and Jooss, Christian},\r\nTITLE = {Structure of Nanocrystalline, Partially Disordered MoS2+δ Derived from HRTEM—An Abundant Material for Efficient HER Catalysis},\r\nJOURNAL = {Catalysts},\r\nVOLUME = {10},\r\nYEAR = {2020},\r\nNUMBER = {8},\r\nARTICLE-NUMBER = {856},\r\nURL = {https://www.mdpi.com/2073-4344/10/8/856},\r\nISSN = {2073-4344},\r\nABSTRACT = {Molybdenum sulfides (MoSx, x > 2) are promising catalysts for the hydrogen evolution reaction (HER) that show high hydrogen evolution rates and potentially represent an abundant alternative to platinum. However, a complete understanding of the structure of the most active variants is still lacking. Nanocrystalline MoS2+δ was prepared by a solvothermal method and immobilized on graphene. The obtained electrodes exhibit stable HER current densities of 3 mA cm−2 at an overpotential of ~200 mV for at least 7 h. A structural analysis of the material by high-resolution transmission electron microscopy (HRTEM) show partially disordered nanocrystals of a size between 5–10 nm. Both X-ray and electron diffraction reveal large fluctuations in lattice spacing, where the average c-axis stacking is increased and the in-plane lattice parameter is locally reduced in comparison to the layered structure of crystalline MoS2. A three-dimensional structural model of MoS2+δ could be derived from the experiments, in which [Mo2S12]2− and [Mo3S13]2− clusters as well as disclinations represent the typical defects in the ideal MoS2 structure. It is suggested that the partially disordered nanostructure leads to a high density of coordinatively modified Mo sites with lower Mo–Mo distances representing the active sites for HER catalysis, and, that these structural features are more important than the S:Mo ratio for the activity.},\r\nDOI = {10.3390/catal10080856}\r\n}\r\n\r\n","author_short":["Ronge, E.","Hildebrandt, S.","Grutza, M.","Klein, H.","Kurz, P.","Jooss, C."],"key":"catal10080856","id":"catal10080856","bibbaseid":"ronge-hildebrandt-grutza-klein-kurz-jooss-structureofnanocrystallinepartiallydisorderedmos2derivedfromhrtemanabundantmaterialforefficienthercatalysis-2020","role":"author","urls":{"Paper":"https://www.mdpi.com/2073-4344/10/8/856"},"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://www.uni-goettingen.de/de/678870.html","dataSources":["J9HHmB7QwWjt7SPyk"],"keywords":[],"search_terms":["structure","nanocrystalline","partially","disordered","mos2","derived","hrtem","abundant","material","efficient","catalysis","ronge","hildebrandt","grutza","klein","kurz","jooss"],"title":"Structure of Nanocrystalline, Partially Disordered MoS2+δ Derived from HRTEM—An Abundant Material for Efficient HER Catalysis","year":2020}