AI Article Synopsis
- Two-dimensional metal nitrides are gaining attention for their use in future electronics and quantum systems, but creating them uniformly and at scale is challenging.
- This study showcases a method called confined growth, which improves the size and quality of 2D metal nitrides by controlling the reaction environment, leading to larger grain sizes and reducing unwanted multilayer formation.
- The research also discovered that adding a promoter helps produce high-quality, single-layer tungsten nitride, which significantly boosts its efficiency in hydrogen evolution reactions, showing a record Tafel slope.
Article Abstract
Two-dimensional (2D) metal nitrides have garnered significant interest due to their potential applications in future electronics and quantum systems. However, the synthesis of such materials with sufficient uniformity and at relevant scales remains an unaddressed challenge. This study demonstrates the potential of confined growth to control and enhance the morphology of 2D metal nitrides. By restricting the reaction volume of vapor-liquid-solid reactions, an enhanced precursor concentration was achieved that reduces the nucleation density, resulting in larger grain sizes and suppression of multilayer growth. Detailed characterization reveals the importance of balancing the energetic and kinetic aspects of tungsten nitride formation toward this ability. The introduction of a promoter enabled the realization of large-scale, single-layer tungsten nitride with a uniform and high interfacial quality. Finally, our advance in morphology control was applied to the production of edge-enriched 2D tungsten nitrides with significantly enhanced hydrogen evolution ability, as indicated by an unprecedented Tafel slope of 55 mV/dec.
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| http://dx.doi.org/10.1021/acsami.3c13286 | DOI Listing |
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