《Table S2 Performance of cobalt/nickel-based carbon composites in acidic medium》
本系列图表出处文件名:随高清版一同展现
《碳纳米管载钴基纳米材料的制备:一种优异的电催化析氢活性材料(英文)》
In order to characterize the electrochemical properties,Linear-sw eep voltammetry(LSV)test w as conducted on CoNiP/NCNTs samples w ith different phosphorus contents after CV scanning w as stabilized in the 0.5 mol/L(p H=0.2)sulfuric acid solution.Pt/C(10 w t.%Pt/XC-72),CoNiO2/NCNTs precursor and NCNTs w ere conducted as contrast.Fig.5a show s that CoNiP/NCNTs-2 has the best HER performance and the low est Tafel slope at10 mA cm-2,but its properties are still not as good as Pt/C.The metal oxides in CoNiP/NCNTs-1 show a deterioration of HER performance in the acidic electrolyte.How ever,due to the phosphates generated by excessive phosphorus in CoNiP/NCNTs-3,and the high electronegativity of P and O(2.14 and 3.44,respectively),they have a strong binding force on free electrons,w hich hinders the movement of free electrons and leads to a decrease in the electrical conductivity w ith low HER performance.Detailed data and comparison w ith other catalysts under the same conditions are show n in Table S1 and Table S2.In order to explain the HER performance of the catalyst materials essentially,w e estimate the amount of active sites at the same time,and the specific values are show n in Table S3.According to Faraday’s formula Q=2n F(F=964 85C/mol)and the total amount of charge transferred during the test,w e can estimate the active sites on the material surface,the calculating results n1=2.18×10-7,n2=7.31×10-7,n3=2.54×10-7mol for CoNiP/NCNTs-q,CoNiP/NCNTs-2 and CoNiP/NCNTs-3,respectively.It can be seen that during the same test time,the amount of active sites exposed from CoNiP/NCNTs-2 is highest among the three samples,indicating the best catalytic activity.
图表编号 | XD00140999000 严禁用于非法目的 |
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绘制时间 | 2020.02.01 |
作者 | 夏霁、李绍敏、高森、谢松、刘昊 |
绘制单位 | 中物院成都科学技术发展中心成都绿色能源与绿色制造技术研发中心、中物院成都科学技术发展中心成都绿色能源与绿色制造技术研发中心、中物院成都科学技术发展中心成都绿色能源与绿色制造技术研发中心、中物院成都科学技术发展中心成都绿色能源与绿色制造技术研发中心、中物院成都科学技术发展中心成都绿色能源与绿色制造技术研发中心 |
更多格式 | 高清、无水印(增值服务) |