Research On Electrochemical Hydrogen Evolution Properties Of Composite Oxide Nanofibers

The highly active hydrogen evolution catalyst PMo₁₂Ni₅O_43.5-NPs/FTO electrode after calcination,Mo₁₂Ni₅O₄₁/FTO electrode after calcination,PMo₁₂Ni₅O_43.5-PNPs/FTO electrode after calcination and bare FTO after calcination were successfully prepared by the traditional electrospinning technology and the treatment of high temperature calcination in the box type resistance furnace under the mild environment conditions and madeacomparison.Testingbyavarietyofcharacterizationinstruments,PMo₁₂Ni₅O_43.5-NPs/FTO has the smallest Tafel slope in the acid environment,46mV/decade and the largest hydrogen evolution potential-0.38V.Therefore,it is concluded that PMo₁₂Ni₅O_43.5-NPs/FTO has the highest electrocatalytic activity in the acid environment and the best performance of hydrogen evolution.In addition,the electrochemical impedance can also prove that the electron transfer rate between the material and the electrolyte solution is fast and the hydrogen evolution reaction is strong.It can be further explained that the three element crystalline composite oxide nanoscale is a very efficient catalyst for hydrogen evolution.In order to further explore whether adding an oxide to form multiple composite oxide materials can improve its electrocatalytic activity and the corresponding hydrogen evolution performance.So we use the experimental method of mixing two heteropoly acid and an acetate forming a kind of multicomponent composite oxide catalyst for hydrogen evolution Ni₁₀W₁₂Mo₁₂P₂O₈₇/FTO electrode by the same method and technology system.Through testing and later comparison,we found that the FTO electrodes modified by these composite oxides had better performance in electrocatalytic hydrogen evolution in acidic environment.The Tafel slope was 40 mV/decade and the potential for hydrogen evolution was-0.15V.Furthermore,so as to highlight the advantages of its hydrogen evolution performance,we had also been tested in the alkaline environment and the results still have excellent electrocatalytic performance.Then we also checked out the electrochemical impedance,and the results were consistent.The electron transfer rate and the kinetics of hydrogen evolution are also excellent.The performance of the hydrogen evolution catalyst emphasized in this paper is indeed more than the performance of the hydrogen evolution catalyst proposed in many markets and in other literature.It also lets us have a hope to find the hydrogen evolution catalyst that can replace the precious metal platinum.