Youn Duck Hyun, Jang Ji-Wook, Kim Jae Young, Jang Jum Suk, Choi Sun Hee, Lee Jae Sung
1] School of Nano-Bioscience and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798 Korea [2].
School of Nano-Bioscience and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798 Korea.
Sci Rep. 2014 Jun 30;4:5492. doi: 10.1038/srep05492.
Highly efficient and stable MoS2 nanocrystals on graphene sheets (MoS2/GR) are synthesized via a hybrid microwave annealing process. Through only 45 second-irradiation using a household microwave oven equipped with a graphite susceptor, crystallization of MoS2 and thermal reduction of graphene oxide into graphene are achieved, indicating that our synthetic method is ultrafast and energy-economic. Graphene plays a crucial role as an excellent microwave absorber as well as an ideal support material that mediates the growth of MoS2 nanocrystals. The formed MoS2/GR electrocatalyst exhibits high activity of hydrogen evolution reaction with small onset overpotential of 0.1 V and Tafel slope of 50 mV per decade together with an excellent stability in acid media. Thus our hybrid microwave annealing could be an efficient generic method to fabricate various graphene-based hybrid electric materials for broad applications.
通过混合微波退火工艺合成了石墨烯片上高效稳定的二硫化钼纳米晶体（MoS2/GR）。使用配备石墨感受器的家用微波炉仅进行45秒照射，就实现了MoS2的结晶以及氧化石墨烯向石墨烯的热还原，这表明我们的合成方法超快且节能。石墨烯作为出色的微波吸收剂以及介导MoS2纳米晶体生长的理想载体材料，发挥着关键作用。所形成的MoS2/GR电催化剂在析氢反应中表现出高活性，起始过电位低至0.1 V，塔菲尔斜率为每十倍50 mV，并且在酸性介质中具有出色的稳定性。因此，我们的混合微波退火可能是一种高效的通用方法，可用于制备各种用于广泛应用的基于石墨烯的混合电子材料。
