| With the rapid development of the global economy,the energy crisis is becoming more and more serious.Therefore,in order to optimize the energy consumption structure and ensure normal energy supply and demand,as a representative of unconventional energy,shale oil is currently the most ideal alternative energy source.However,shale oil contains nitrides.The high content hinders the development of shale oil refining technology,and the removed basic nitride is a rational nitrogen source and carbon source,which can be used by synthesizing nitrogen-doped carbon materials.This paper used hydrochloric acid extraction method to extract nitrides from shale oil,and then used CTAB modified silica template method to prepare mesoporous nitrogen-doped carbon materials,and then improved the sodium borohydride reduction method for platinum loading,and finally passed through the material nitrogen The linear regression analysis of the type ratio and the hydrogen evolution activity determined the main active sites of the hydrogen evolution reaction.The conclusions are as follows:（1）Firstly,alkaline nitrides in shale oil were extracted with hydrochloric acid as carbon source and nitrogen source.Mesoporous-macroporous and mesoporous carbon materials were prepared by silica template method and CTAB-silica template method.In comparison,it is found that after CTAB optimization,the morphology of the carbon material changes from sponge-like to hollow carbon spheres,the proportion of ordered structure is greatly increased,and the specific surface area is increased,and the electrochemical performance of the material is significantly improved,indicating that CTAB has successfully uniformized silica Dispersed in the nitride,the overall structure of the prepared carbon material is strengthened.Not only that,the nitrogen content in the carbon material increases after optimization,and nitrogen atoms are the best active sites for anchoring metals,which improves the loading and dispersion of platinum atoms.,Thereby enhancing the hydrogen evolution activity.（2）Comparing the effects of different reduction methods of platinum-based catalysts,it is found that the weak reducing agent ethylene glycol loading method is not desirable,and the strong reducing agent sodium borohydride reduction should be selected as the platinum-supported reduction method.PVP-sodium borohydride reduction can effectively reduce the size of platinum nanoparticles and increase the catalyst activity,indicating that the carbonyl group in polyvinylpyrrolidone forms a strong chemical bond with platinum.It acts as a protective agent during the reduction process to control the morphology of platinum nanoparticles.The above greatly improves the hydroelectric hydrogen analysis performance of the catalyst.Comparing the effects of different loadings on the hydrogen evolution performance,it is found that as the platinum loading increases,the hydrogen evolution activity of the catalyst continues to increase.It is worth noting that the hydrogen evolution activity of the catalyst with 6%loading is equivalent to 20%of the commercial platinum carbon electrode,and the electric double layer The capacitance value is as high as 43.15m F·cm-2,and the stability is good,indicating that the trace platinum-based catalyst can replace commercial platinum-carbon electrodes in some aspects,achieving the goal of low loading and high activity.（3）Finally,the influence of nitrogen type on the hydrogen evolution reaction of platinum-based nitrogen-doped mesoporous carbon is explored in a deeper level.Through linear regression analysis of the ratio of each nitrogen type inside the carbon material and the hydrogen evolution activity,it is determined that pyrrole nitrogen is the best nitrogen type for hydrogen evolution reaction.And then normalize the carbon atoms and perform linear regression analysis again to prove the conclusion.Finally,changing the calcination temperature of the carbon material to adjust the ratio of nitrogen types,once again proved that pyrrole nitrogen is the best nitrogen type for hydrogen evolution reaction,and can improve the catalytic performance of the material in the hydroelectric decomposition hydrogen reaction. |
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