Molybdenum compounds 19 Layered semiconductors 16 Sulfur compounds 10 molybdenum 10 Molybdenum oxide 8 Molybdenum alloys 7 Molybdenum 6 Transition metals 6 Electrodes 5 Friction 5 Monolayers 5 Antarctica 4 Article 4 Binary alloys 4 Density functional theory 4 Selenium compounds 4 Two-dimensional 4 Aluminum alloys 3 Boron nitride 3 Cobalt alloys 3 Cobalt compounds 3 Graphene 3 Scanning electron microscopy 3 Temperature distribution 3 Transition metal dichalcogenides (TMD) 3 Tungsten compounds 3 Van der Waals forces 3 Wear of materials 3 hydrogen peroxide 3 molybdenum disulfide 3