Synthesis Of The Nickel Copper Phosphorus And Nickel Boride Modified G-C₃N₄ Electrocatalysts And Their Her Activity

Hydrogen has excellent characteristics such as rewable,higher energy density and no pollution but water after reaction.It can be an ideal alternative to traditional fossil fuels.Electrolying water is an effective way to produce fuel grade hydrogen,but blocked in large-scale production due to excessive energy consumption.Therefore,the catalyst can lagerly reduce the overpotential during hydrogen production is really improtant.Platinum has fabulous catalytic performance in hydrogen evolution reaction a.k.a HER,however the luxurious price prevented its use in industrial production.The abundant non-precious metal espicially transition metal catalysts with good electrocatalytic performance are urgently needed.Under such background,in this paper,Ni-Cu-P alloy catalysts were synthesised by electrodeposition,and their HER activity in alkaline media were tested.Ni-Cu-P alloy catalysts grown on a nickel sheet by electrodeposition under a constent current density,electrochiemcal workstation was used to test the performance.XRD and XPS analysis were used to detected the structures and elements states.SEM and TEM were performed to study the surface morphologies.When the mole ratio of Ni and Cu in electrolyte reached 2:100,a pine-needle like nanotube structure of Ni-Cu-P alloy was synthsized,incredable HER performance was observed.The as-synthesized sample pocessed an best overpotentail of-107 mV at the current density of 10 mA/cm²,lower R_ct at a value of 3?,larger ECSA as 300.6?10^-4 cm².The pine-needle like nanotube structure of Ni-Cu-P alloy catalyst synthesised by electrodeposition has outstanding HER performance.g-C₃N₄ has excellent stability,facile synthesis route,abundant in raw mateials and semiconductor properties,so it is widely used in the field of photocatalysis.However its electrical conductivity and electrocatalytic performance were unsatisfied.So in this paper,g-C₃N₄ was modified by hybrizing with Ni₂B,largerly promoted the HER performance.The SEM and AFM imagines confirmed that the addition of Ni₂B separated the layers in g-C₃N₄,reduced the thickness of g-C₃N₄ layer structure.BET test reveal that the specific areas were magnified.The HER activity test showed the addition of 0.05wt%Ni₂B in g-C₃N₄ decreased the overpotential of 349 mV compare to raw g-C₃N₄.The large promotion in HER performance make it possible for g-C₃N₄ used as electrocatalyst.