Hydrogen Evolution Properties Study On Cathode Of Surface Modifications Of Carbon Nanofibers As Catalyst Or Metal Catalyst Support

In this paper, the effects of surface modification of carbon nanofibers as catalyst or catalyst support to load metal nanoparticles on their electrocatalytic activity for HER were studied. At present, some research results obtained are as follows:(1) Oxygen-(CNF-OX) and nitrogen-containing (CNF-ON) functional groups could be successfully introduced into the CNFs surface after sonochemical treatment, and the electrocatalytic activity of the modified CNFs for HER is higher than the untreated CNFs (CNF-UN), and the CNF-ON catalyst exhibits higher HER activity than the CNF-OX catalyst.(2) B atoms can be doped into the CNFs surface by pyrolysis of boric acid, and the HER activity of B-doped CNF-UN catalyst(B-CNF-UN) is higher than the B-doped CNF-OX catalyst(B-CNF-OX), and the HER activity of the former is close to the CNF-ON catalyst.(3) MnO2/CNF-OX composite catalyst was prepared by using the CNF-OX as support, the results indicated that the HER activity of Mn02/CNF-OX is higher than the CNF-OX. Using Mn02/CNF-OX as catalyst support to load Ni nanoparticles had better activity than using CNF-OX as the support, this can be attributed to the synergistic effect between Ni and MnO2.(4) Pt/CNF catalyst prepared by ethylene glycol exhibited the highest HER activity than using hydrazine hydrate and sodium borohydride as the reducing agent. And then using CNF-UN and CNF-OX as support respectively to prepare Pt/CNF catalysts with four different Pt loading capacity by ethylene glycol, the electrochemical results showed that the Pt/CNF catalyst with CNF-UN as support and Pt loading capacity is 10wt.% exhibited the highest activity for HER.