Enhanced utilization and durability of Pt nanoparticles supported on sulfonated carbon nanotubes

Enhanced utilization and durability of Pt nanoparticles supported on sulfonated carbon nanotubes
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磺化碳纳米管负载的 Pt 纳米粒子的利用率和耐久性得到提高

DOI:
10.1016/j.jpowsour.2014.01.040
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发表时间:
2014-06
影响因子:
9.2
通讯作者:
Zidong Wei
Zidong Wei
中科院分区:
工程技术2区
文献类型:
--
作者:
Lin Guo;Siguo Chen;Zidong Wei

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我们合成了一种具有高 Pt 利用率和耐久性的混合催化剂,其中 Pt 纳米颗粒沉积在具有传导质子和电子的磺化碳纳米管(SO3H-Ar-CNT)上。催化剂(Pt/SO3H-Ar-CNTs)的电化学性能分别通过循环伏安法、线性扫描伏安法和燃料电池测试进行评估。实验结果表明,与 Pt/COOH-CNTs 催化剂相比,Pt/SO3H-Ar-CNTs 催化剂表现出良好的氧还原反应活性、增强的耐久性和优异的 Pt 利用率。 Pt/SO3H-Ar-CNTs催化剂性能的提高归因于通过共价修饰方法在CNTs表面引入磺酸基团,确保Pt NPs位于三相区,提高Pt利用率并减少SO3H-Ar-CNTs的腐蚀。
We have synthesized a hybrid catalyst with the high Pt utilization and durability, in which the Pt nanoparticles are deposited on the sulfonated carbon nanotubes (SO3H–Ar–CNTs) with conducting proton and electron. Electrochemical performance of the catalyst (Pt/SO3H–Ar–CNTs) is evaluated by the cyclic voltammograms, linear sweep voltammetry and fuel cell tests, respectively. The experimental results demonstrate that the Pt/SO3H–Ar–CNTs catalyst exhibits good oxygen reduction reaction activity, enhanced durability and excellent Pt utilization compared with the Pt/COOH–CNTs catalyst. The improved performance of Pt/SO3H–Ar–CNTs catalyst is ascribed to the introduction of the sulfonic acid group onto the CNTs surface by the covalent modification method, which ensures Pt NPs locate in triple-phase zones to increase Pt utilization and reduces the corrosion of the SO3H–Ar–CNTs.
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