Research On Electrocatalytic Hydrogen Evolution Properties Of Layered Composite Metal Oxide Nanofibers

Firstly,the electrocatalytic performances of highly effective catalyst MCNFs/FTO and bare FTO electrode after calcination,PVA/FTO electrode after calcination,MNFs/FTO and CNFs/FTO produced by moderate electrospinning technology and simple calcination treatment were compared.The results showed that MCNFs have the highest hydrogen evolution activity and the best performance in acid condition for hydrogen evolution.In addition,the smallest hydrogen evolution Tafel slope of MCNFs was found up to 89 mV/decade in the acidic environment.The electrochemical impedance of MCNFs hybrid proves that in MnCo2O4/electrolyte interface has efficient electron transfer and hydrogen evolution reaction kinetics.The second chapter showed that MCNFs have the highest hydrogen evolution activity and the best performance in acid condition for hydrogen evolution,and the metal composite appeared positive synergy.Then we further investigated the electrochemical performance of composite metal oxide materials for hydrogen evolution.A variety of efficient composite metal oxide catalysts were prepared by mild electrospinning technology and simple calcination treatment for hydrogen evolution.Compared the electrochemical hydrogen evolution behavior of these catalysts,we found that the FTO electrode modified by composite metal oxide catalyst generally has a good performance for hydrogen evolution in acid environment.In addition,the minimum hydrogen evolution Tafel slope of composite metal oxide catalyst for hydrogen evolution in the acidic environment was obtained up to 76 mV/decade,the performance is better than much representative hydrogen evolution catalysts on the market.Electrochemical impedance characterization proved that composite metal oxide catalyst in material/electrolyte interface has efficient electron transfer and hydrogen evolution reaction kinetics.These results demonstrate that the composite oxide catalyst is generally superior performance on hydrogen evolution,and is potential promising catalyst for hydrogen evolution.