Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Nanoscale. 2017 Oct 26;9(41):15895-15900. doi: 10.1039/c7nr05500e.
Electrochemical water splitting has been intensively pursued as a promising approach to produce clean and sustainable hydrogen fuel. However, the lack of low-cost and high-performance electrocatalysts for the hydrogen evolution reaction (HER) hinders the large-scale application. Herein, we have rationally designed and synthesized 3D self-assembly architectures assembled from ultrafine MoC nanoparticles (0D) uniformly embedded within N-doped carbon nanosheets (2D) for the HER via a simple protocol. The well-organized 3D nanostructures are composed of very small MoC nanocrystallites (<2 nm) and free-stretching conductive carbon nanosheets with high specific surface areas and abundant mesopores, which can expose more active sites and facilitate electron/ion transport pathways. Based on the merits of the composition and configuration, the resultant hierarchical 3D self-assembly architectures exhibit remarkable electrocatalytic performance and stability for the HER.
电化学水分解作为一种有前途的生产清洁可持续氢燃料的方法受到了广泛关注。然而，缺乏用于析氢反应 (HER) 的低成本、高性能电催化剂阻碍了其大规模应用。在此，我们通过简单的方案，合理设计并合成了由超小的 MoC 纳米颗粒 (0D) 均匀嵌入氮掺杂碳纳米片中 (2D) 组装而成的 3D 自组装结构，用于 HER。这种有序的 3D 纳米结构由非常小的 MoC 纳米晶（<2nm）和具有高比表面积和丰富介孔的自由伸展的导电碳纳米片组成，其可以暴露出更多的活性位点并促进电子/离子传输途径。基于组成和结构的优势，所得的分级 3D 自组装结构表现出对 HER 的显著电催化性能和稳定性。
