State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Department of Materials Science & Engineering, University of California Los Angeles, CA, 90095, USA.
Angew Chem Int Ed Engl. 2016 May 23;55(22):6502-5. doi: 10.1002/anie.201600686. Epub 2016 Apr 20.
Increasing the active edge sites of molybdenum disulfide (MoS2 ) is an efficient strategy to improve the overall activity of MoS2 for the hydrogen-evolution reaction (HER). Herein, we report a strategy to synthesize the ultrasmall donut-shaped Cu7 S4 @MoS2 hetero-nanoframes with abundant active MoS2 edge sites as alternatives to platinum (Pt) as efficient HER electrocatalysts. These nanoframes demonstrate an ultrahigh activity with 200 mA cm(-2) current density at only 206 mV overpotential using a carbon-rod counter electrode. The finding may provide guidelines for the design and synthesis of efficient and non-precious chalcogenide nanoframe catalysts.
增加二硫化钼（MoS2）的活性边缘位点是提高 MoS2 析氢反应（HER）整体活性的有效策略。在此，我们报告了一种合成具有丰富活性 MoS2 边缘位点的超小环形 Cu7 S4@MoS2 异质纳米框架的策略，可用作高效 HER 电催化剂替代铂（Pt）。这些纳米框架在使用碳棒对电极时，仅在 206 mV 的过电势下即可达到 200 mA·cm-2 的超高电流密度。这一发现可能为设计和合成高效、非贵金属的硫属化物纳米框架催化剂提供指导。
