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为了研究镍磷纳米颗粒(Ni-P)的晶化对其催化析氢性能的影响,利用自催化还原反应及热处理工艺制备非晶Ni-P纳米颗粒及晶态Ni_(12)P_5。通过对样品进行电催化析氢性能分析,发现晶化的Ni_(12)P_5与晶化前的Ni-P相比,其催化析氢性能有了极大的提升。X射线衍射、透射电子显微镜及X射线光电子能谱分析结果表明,Ni_(12)P_5中形成了Ni-P键,使其中的Ni、P分别带有微弱的正、负电荷,[Ni Fe]氢化酶及其同系物的这种性质类似,会减少析氢过程中氢气脱离的能量消耗,Ni_(12)P_5的高效催化析氢性能可能与此有关。
In order to study the influence of Ni-P crystallization on its hydrogen evolution performance, amorphous Ni-P nanoparticles and crystalline Ni_ (12) P_5 were prepared by autocatalytic reduction and heat treatment. By analyzing the electrocatalytic hydrogen evolution performance of the sample, it was found that the crystallized Ni_ (12) P_5 has a great improvement on the catalytic performance of hydrogen evolution compared with the pre-crystallization Ni-P. X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy analysis showed that Ni-P bonds were formed in Ni_ (12) P_5, and Ni and P in them were weakly charged positively and negatively, respectively [NiFe] This property of hydrogenase and its homologues is similar, which will reduce the energy consumption of hydrogen evolution during hydrogen evolution. The high hydrogen evolution performance of Ni_ (12) P_5 may be related to this.