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A new form of nanorattle, WS2@WS2 nanorattle, is prepared for the first time by direct sulphidation of pre-synthesised W@WS2 nanorattle template at 350 °C. Its microstructural and crystalline structures are characterized, and its electrocatalytic activity and stability in the hydrogen evolution reaction examined. WS2 nanoflakes are formed in-situ from sulphidation of the original W cores, and remain...
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