Molybdenum disulfide and Au ultrasmall nanohybrids as highly active electrocatalysts for hydrogen evolution reaction
Molybdenum disulfide and Au ultrasmall nanohybrids as highly active electrocatalysts for hydrogen evolution reaction
复制标题
二硫化钼和金超小型纳米杂化物作为析氢反应的高活性电催化剂
DOI：
10.1039/c6ta10385e
复制
发表时间：
2017-02-28
影响因子：
11.9
通讯作者：
Li, Meixian
中科院分区：
文献类型：
--
作者：
Zhang, Jinxuan;Wang, Tanyuan;Li, Meixian
二硫化钼（MoS2）是一种很有前景的水分解制氢催化剂。但与Pt族金属的电催化性能相比仍存在差距。在此，我们提出了一种简单的溶剂热方法来制备平均直径为 2.5 nm 的超小型 MoS2-Au 纳米杂化物。 MoS2-Au纳米杂化物表现出优异的HER性能，起始电位低至17 mV，Tafel斜率为40 mV dec−1，电流密度为10 mA cm−2，过电位仅为66 mV。 HER催化活性的增强归因于金的掺杂导致Au和MoS2之间的协同效应，促进了边缘位点的活性并增强了电导率。我们的工作提供了一种合成杂化MoS2以增强析氢反应（HER）的新方法。
Molybdenum disulfide (MoS2) is a promising catalyst for hydrogen generation from water splitting. However, there is still a gap compared to electrocatalytic performance of Pt group metals. Herein, we propose a simple solvothermal method to prepare ultrasmall MoS2–Au nanohybrids with average diameters of 2.5 nm. The MoS2–Au nanohybrids exhibit superior HER performance with a low onset potential of 17 mV, a Tafel slope of 40 mV dec−1 and a current density of 10 mA cm−2 at an overpotential of only 66 mV. The enhanced HER catalytic activity is attributed to the doping of gold resulting in a synergistic effect between Au and MoS2, which promotes the activity of the edge sites and enhancement of conductivity. Our work has provided a new approach to synthesize hybridized MoS2 for an enhanced hydrogen evolution reaction (HER).