Center for Nanochemistry (CNC), Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, P. R. China.
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China.
Adv Mater. 2016 Aug;28(29):6207-12. doi: 10.1002/adma.201504762. Epub 2016 Feb 5.
2D layered transition metal dichalcogenides (TMDCs) have emerged as new possibilites beyond conventional particulate catalysts in facilitating efficient electrochemical hydrogen evolution. This is mainly mediated by the ultrahigh surface-to-volume ratio and the effective coupling of all active sites with supporting electrodes. Especially, the facile chemical vapor deposition (CVD) method has enabled morphological engineering of monolayer TMDC catalysts toward development of abundant active edge sites within the 2D plane. Here, two pathways to achieve such purpose are highlighted, either by non-equilibrium growth of MoS2 dendrites or throughout high-density nucleation of MoS2 nanoflakes directly on the electrode materials. Furthermore, future research directions have also been proposed and discussed to further enhance the efficiency of such unique catalysts.
二维层状过渡金属二卤化物（TMDCs）在促进高效电化学析氢方面，除了传统的颗粒催化剂之外，为人们提供了新的可能性。这主要是通过超高的表面积与体积比以及所有活性位点与支撑电极的有效耦合来实现的。特别是，易于实施的化学气相沉积（CVD）方法使得单层 TMDC 催化剂的形态工程成为可能，从而在二维平面内开发出丰富的活性边缘位点。在此，重点介绍了实现这一目标的两种途径，一种是通过 MoS2 枝晶的非平衡生长，另一种是通过 MoS2 纳米片在电极材料上的高密度形核。此外，还提出并讨论了未来的研究方向，以进一步提高这种独特催化剂的效率。
