| 초록 |
Nowadays, the production of hydrogen is getting attention because of an increase in the global demand for energy and the aggravation of environmental problems by burning of fossil fuels. The hydrogen evolution reaction (HER) constitutes half of the water-splitting reaction. HER is effectively facilitated by noble metals such as Pt. However, replacement of Pt with earth-abundant metals would be desirable in an aspect of a large-scale application because of its scarcity and high cost. There are a lot of earth abundant catalysts with great performance like Ni2P, MoS2, Ni-Mo, CoP, MoP and so on. Among them, Nickel phosphide is a well-known catalyst for Hydrodesurfurization, called HDS. Both HDS and the HER rely on the catalyst to reversibly bind H2, and H2 dissociating to produce hydrogen sulfide in HDS and hydrogen in the HER. And other HDS catalysts such as MoS2 show the commonalities between mechanisms and active sites for both HDS and HER. So, Ni2P may also provide active for the HER. Also, it shows similarity to the active site of [NiFe]hydrogenase, which is a highly active biological HER catalyst. Here, various methods to improve stability and activity of Ni2P is reported. |
