375676 2D Transition Metal Chalcogenide Electrocatalysts

Thursday, November 20, 2014: 9:10 AM
307 (Hilton Atlanta)
Chao Wang, Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD

Two-dimensional transition metal chalcogenides (2D TMCs) have recently received great attention for electronic and catalytic applications. Here we report on organic solvothermal synthesis of 2D TMCs and their electrocatalytic applications for the hydrogen evolution reaction (HER). By thermal decomposition of molybdenum carbonyl and subsequent sulfurization with element sulfur, monolayer MoS2 nanosheets obtained via preferential in-plane growth/attachment. A mild-temperature thermal treatment was developed to remove the organic ligands without changing the chemical composition or damaging the 2D nanostructure. Further high-temperature annealing was shown to induce stacking of the MoS2 sheets but not inducing phase transition and lateral aggregation. The 2D MoS2 produced by our approach are highly active for the HER, with the activity found to be further dependent on stacking of the nanosheets.

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See more of this Session: Novel Catalytic Materials
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