Synthesis And Catalytic Performance Of Fe Doped Skutterudite-type CoP₃ Nanoneedles

Along with the progress of human society,energy and environmental issues are gradually becoming the main obstacles restricting the progress of human science and technology.Therefore,how to obtain sustainable development of clean energy is an issue that we urgently need to solve.As an emerging clean energy,hydrogen is one of the excellent energy sources to replace traditional fossil energy in the future.However,the main obstacle is that the cost of hydrogen production is too high.Non-noble-metal catalysts are the key to solve the cost problem and develop water splitting to produce hydrogen.To achieve the purpose of resolving the energy crisis,a process which can be used to overcome the energy crisis.In this study,we invented a two-step method,successfully growing a skutterite-typecobalt phosphide(CoP3)with a nano-needle array structure on carbon cloth,and successfully doped with iron.The electronic structure of the catalyst is regulated,and the active sites on the catalyst sturface are increased,so that the Co1-xFexP3 nanoneedle array electrocatalyst has excellent hydrogen and oxygen evolution capabilities.Among a series of Co1-xFexP3 nanoneedle array samples prepared,Co0.7Fe0.3P3/CC nanoneedle array samples showed the best hydrogen evolution ability.In alkaline environment,the current density was 10mA/cm2,which The hydrogen evolution overpotential(?10)is 167 mV vs.RHE,and its Tafel slope is 65.1 mV dec-1.At the same time,at a current density of 50 mA/cm2,its oxygen evolution overpotential(?50)is 330 mV vs.RHE.This result proves that simple doping of non-noble metal elements is an effective way to improve the hydrogen evolution capacity and oxygen evolution capacity of skutterite-type electrocatalysts in alkaline media.