碳纸负载高指数晶面铂纳米粒子的制备及其在直接甲酸燃料电池中的催化性能研究
发布时间：2018-11-29 14:07
【摘要】：直接甲酸燃料电池(DFAFCs)是一种很有前景的可用于移动电子设备的电源.钯对甲酸电催化氧化有很高的活性,但稳定性较差,容易失活;铂对甲酸电催化氧化的活性低于钯,但稳定性好.前期研究表明,高指数晶面铂纳米粒子对甲酸的电催化氧化活性显著高于低指数晶面铂纳米粒子.本文以碳纸为载体,应用方波电位法生长高指数晶面铂纳米粒子(HIF-Pt/C-paper),通过改变方波上下限电位,合成出不同粒径的二十四面体和偏方三八面体铂纳米粒子.进一步在碳纸上修饰一层碳黑微孔层并优化电沉积条件,制备出粒径约10 nm,载量0.069 mg·cm~(-2)的HIF-Pt/C-paper作为DFAFCs的阳极催化剂.在甲酸浓度为3 mol·L~(-1)时,测得30oC下单电池最大功率密度10.6 m W·cm~(-2),最大质量功率密度153.5 m W·mg~(-1)Pt,是以1 mg·cm~(-2)载量的商业60%(by mass)Pt/C(简称商业Pt/C)为阳极催化剂的电池的8.4倍.HIF-Pt/C-paper阳极DFAFCs在20 m A·cm~(-2)条件下运行50 h,电压保持率为95%,显示出很好的稳定性.
[Abstract]:Direct formic acid fuel cell (DFAFCs) is a promising power source for mobile electronic devices. Palladium has a high activity for formic acid electrooxidation, but its stability is poor and it is easy to deactivate, while platinum has lower activity for formic acid electrooxidation than palladium, but has good stability. Previous studies showed that the electrocatalytic oxidation activity of high index platinum nanoparticles for formic acid was significantly higher than that of low index platinum nanoparticles. In this paper, high exponent platinum nanoparticles (HIF-Pt/C-paper) were grown on carbon paper by square wave potential method. 24 and partial trioctahedron platinum nanoparticles with different diameters were synthesized by changing the upper and lower potential of square wave. Furthermore, a layer of carbon black microporous layer was modified on carbon paper and the electrodeposition conditions were optimized to prepare HIF-Pt/C-paper with a particle size of about 10 nm, (0.069 mg cm~ (-2) as anodic catalyst for DFAFCs. When formic acid concentration was 3 mol L ~ (-1), the maximum power density of 30oC was 10.6 MW cm~ (-2) and the maximum mass power density was 153.5 MW mg~ (-1) Pt,. It is 8.4 times as high as that of the battery with 1 mg cm~ (-2) of commercial 60% (by mass) Pt/C (abbreviated as commercial Pt/C) as anode catalyst. HIF-Pt/C-paper anodic DFAFCs is operated at 20 Ma cm~ (-2) for 50 h. The voltage retention rate is 95, showing good stability.
【作者单位】： 厦门大学固体表面物理化学国家重点实验室化学化工学院;中国科学院上海高等研究院;
【基金】：国家自然科学基金创新研究群体项目(No.21321061);国家自然科学基金(海外及港澳学者合作研究基金)延续资助项目(No.21229301) 国家自然科学基金委员会-国际纯粹与应用化学联合会(国际(地区)合作与交流项目)(No.21361140374)资助
【分类号】：O643.36;TM911.4
本文编号：2365192
[Abstract]:Direct formic acid fuel cell (DFAFCs) is a promising power source for mobile electronic devices. Palladium has a high activity for formic acid electrooxidation, but its stability is poor and it is easy to deactivate, while platinum has lower activity for formic acid electrooxidation than palladium, but has good stability. Previous studies showed that the electrocatalytic oxidation activity of high index platinum nanoparticles for formic acid was significantly higher than that of low index platinum nanoparticles. In this paper, high exponent platinum nanoparticles (HIF-Pt/C-paper) were grown on carbon paper by square wave potential method. 24 and partial trioctahedron platinum nanoparticles with different diameters were synthesized by changing the upper and lower potential of square wave. Furthermore, a layer of carbon black microporous layer was modified on carbon paper and the electrodeposition conditions were optimized to prepare HIF-Pt/C-paper with a particle size of about 10 nm, (0.069 mg cm~ (-2) as anodic catalyst for DFAFCs. When formic acid concentration was 3 mol L ~ (-1), the maximum power density of 30oC was 10.6 MW cm~ (-2) and the maximum mass power density was 153.5 MW mg~ (-1) Pt,. It is 8.4 times as high as that of the battery with 1 mg cm~ (-2) of commercial 60% (by mass) Pt/C (abbreviated as commercial Pt/C) as anode catalyst. HIF-Pt/C-paper anodic DFAFCs is operated at 20 Ma cm~ (-2) for 50 h. The voltage retention rate is 95, showing good stability.
【作者单位】： 厦门大学固体表面物理化学国家重点实验室化学化工学院;中国科学院上海高等研究院;
【基金】：国家自然科学基金创新研究群体项目(No.21321061);国家自然科学基金(海外及港澳学者合作研究基金)延续资助项目(No.21229301) 国家自然科学基金委员会-国际纯粹与应用化学联合会(国际(地区)合作与交流项目)(No.21361140374)资助
【分类号】：O643.36;TM911.4
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1 王成名;高指数晶面金属纳米结构的可控合成及电催化性能研究[D];中国科学技术大学;2013年
，本文编号：2365192
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