Preparation of tungsten carbide/carbon composite fiber and its hydrogen evolution performance in electrolytic water
Tungsten carbide/carbon(WC/C)composite fibers were prepared by electrospinning method using polyacrylonitrile,N,N-dimethylformamide,and ammonium metatungstate(AMT)as raw materials,whose microstructures and hydrogen evolution activities were analyzed.The results showed that continuous fibers could be obtained with different ammonium metatungstate contents in the spinning solution,whereas the length of WC/C composite fibers after heat treatment was reduced with the increasing content of ammonium metatungstate.The over-potentials of WC/C composite fibers were reduced with the increasing content of ammonium metatungstate in the spinning solution,but the electrochemical active areas were enhanced.The over-potential of AMT-1.2 was 162 mV,indicating that WC endowed the WC/C composite fibers with excellent catalytic activity.In addition,with the increasing of WC content in the composite fiber,the Tafel slope of fibers was continuously increased,while the electrochemical reaction rate of hydrogen evolution was reduced to some extent,but endowed it with good corrosion resistance.
tungsten carbidecomposite fiberelectrospinningelectrocatalytic performance of hydro-gen evolutionelectrochemistry
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NSTL
万方数据
维普
