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摘要：本论文首先通过浸渍-还原法分别制备出了以碳粉VulcanXC-72R为载体，Pt含量为20%的Pt/C催化剂及Pt、Co含量各10%的Pt-Co/C催化剂。通过循环伏安曲线和线性扫描伏安曲线比较两种催化剂的电催化性能，从而判断出可以用Pt-Co/C催化剂来代替Pt/C催化剂，以达到减少贵金属的用量，降低催化剂制作成本的目的。再文持Pt的含量为10%，制备出Co含量分别为5%、15%、20%、25%的一系列Pt-Co/C催化剂。比较不同组成催化剂的催化性能，寻找最优配比。实验结果发现Pt含量为10%，Co含量为15%的Pt-Co/C催化剂催化性能最好。另外，将CNTs取代碳粉作为载体，同样发现10%的Pt与15%的Co形成的催化剂催化效果最好。比较相同组成、不同载体催化剂的循环伏安曲线发现，以CNTs为载体制备的Pt-Co/CNTs催化剂的还原峰电流比以VulcanXC-72R为载体的催化剂有所降低，但其还原峰电位却有所增大。10947
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毕业论文关键词： 燃料电池；铂钴合金；阴极催化剂；电还原；双氧水
Study of different composition of Pt-Co alloy catalyst for the electrocatalytic reduction performance of H2O2
Abstract: In this paper, we prepared Pt/C(containing 20% Pt) and Pt-Co/C (metal content=10% in either case) by the impregnation-reduction method. After comparing the two catalysts’ electrocatalytic performance through cyclic voltammetry and linear sweep voltammetry curves, we found Pt-Co/C catalysts can be used instead of Pt/C catalysts. So it is possible to achieve the goal of reducing the amount of the noble metal and production costs. Then, we prepared a series of Pt-Co/C catalysts by the same method, such as Pt-Co1/C(containing 10% Pt and 5% Co), Pt-Co2/C(containing 10% Pt and 10% Co), Pt-Co3/C(containing 10% Pt and 15% Co), Pt-Co4/C(containing 10% Pt and 20% Co) and Pt-Co5/C(containing 10% Pt and 25% Co). Comparing the catalytic performance of all the catalysts of different proportions can help us to find the optimal ratio. The experimental results show that the Pt-Co3/C(containing 10% Pt and 15% Co) catalyst has the best catalytic performance. In addition, CNTs was used in this paper as carrier of catalysts. We also found that the optimal ratio is the Pt-Co3/CNTs(containing 10%
Pt and 15% Co) . Cyclic voltammetry curves of catalysts of the same ratio and different carriers showed that，compared with Pt-Co/C, the peak currents of Pt-Co/CNTs are lower，but their peak potentials are higher.
Keywords：DBHFC；Pt-Co alloy；cathode electro-catalyst；electro-reduction；hydrogen peroxide
目录
1 绪论1
1.1 引言1
1.2 燃料电池概述1
1.3 直接硼氢化钠-双氧水燃料电池（DBHFC）2
1.3.1 DBHFC的特点2
1.3.2 DBHFC的工作原理3
1.3.3 DBHFC的研究现状4
1.4 DBHFC阴极催化剂4
1.4.1 DBHFC阴极催化剂的种类4
1.4.2 DBHFC阴极催化剂的载体6
1.4.3 DBHFC阴极催化剂的制备方法7
1.5 本论文研究的目的、意义及主要内容8
1.5.1 本文研究的目的及意义8
1.5.2 研究内容8
2 实验部分10
2.1 实验药品10
2.2 实验仪器10
2.3 催化剂制备11
2.3.1 碳载体的预处理11
2.3.2 Pt/C催化剂的制备11
2.3.3 Pt-Co/C催化剂的制备11
2.3.4 CNTs的预处理12
2.3.5 碳纳米管为载体的催化剂的制备12
2.4 电极的制备13
2.5 X射线衍射(XRD)对催化剂的表征13
2.6 电极电化学测试及催化剂的表征13
2.6.1 循环伏安测试（CV）14
2.6.2 线性扫描伏安测试（LSV）15
3 实验结果16
3.1 碳粉负载不同组成催化剂的性能分析16
3.1.1 Pt20%/C与Pt10%Co10%/C催化剂的性能分析16
3.1.2 碳粉负载不同组成铂钴合金催化剂的性能分析18
3.2 碳纳米管（CNTs）负载不同组成催化剂的性能分析22
3.2.1 Pt20%/CNTs与Pt10%Co10%/CNTs催化剂的性能分析22