| In order to establish a new hydrogen energy system to gradually replace the traditional fossil-based energy sources and achieve the national goal of carbon neutrality at an early date,it is imperative to accelerate the research on catalysts for hydrogen production from electrolytic water.Based on this background,the ruthenium-based catalyst,which is the most cost-effective among the platinum group metals,was selected;the bimetallic-biomass carbon-based catalyst was constructed by using biomass,which is easily accessible in nature,as the reaction substrate,and the optimization of the hydrogen precipitation reaction by using the characteristics of biomass multivacancy.Based on the above analysis,this paper has the following two studies,the main contents of which are as follows:（1）A simple route to synthesize Ru M-C bimetallic nanomixes is presented and the electrochemical properties of introducing different metals（V,W,Mo,Zn,Cu）and Ru doping are compared.The metal compounds were introduced into the fungus and the two were fused by a simple impregnation method.The prepared catalysts appeared to have a lamellar structure,which was favorable for the exposure of active sites,while the activity of Ru increased with the introduction of metals,demonstrating that the embedding of different metals had an effect on the morphology and properties of Ru-C itself.The optimal Ru V-C was selected for detailed analysis and characterization in this experiment,and electrochemical tests can indicate that the order of electrocatalytic activity is Ru V-C>Ru Zn-C>Ru W-C>Ru Mo-C>Ru-C>Ru-C>Ru Cu-C>BF-C.The prepared Ru V-C exhibited excellent and stable HER activity with an overpotential as low as 65.78 m V and a Tafel slope of 45.26 m V dec-1at a current density of 10 m A cm-2.（2）Biomass carbon-based catalysts were prepared by loading ruthenium and vanadium bimetals onto biomass substrates by a simple impregnation method using waste biomass from nature as a carrier and KOH as an activator,followed by high-temperature carbonization.This catalyst was prepared to reduce the economic cost,and the catalytic activity was further analyzed by SEM,XRD,Raman and other characterization means for the sample and composition of the catalyst,and illustrated by electrochemical tests.The results show that the Ru-V-GP material with excellent properties has an irregular spherical structure,and the carbon of the substrate is irregular during the carbonization process because of the biomass substrate,resulting in a defective structure.The electrochemical test results showed that the overpotential was 109.6 m V with a Tafel slope of 191.2 m V dec-1at a current density of 10 m A cm-2when tested in an electrolyte solution of 1 mol L-1KOH.More excitingly,Ru-V-GP has excellent stability with a high stability of only 17 m V decrease in potential during a continuous 10 h stability performance test. |
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