硫化钼改性的碳载体对提高PEMFC抗CO性能的研究

Research on improving CO tolerance in PEMFC by using MoS2 modified carbon as support

质子交换膜燃料电池(PEMFC)阳极铂(Pt)的一氧化碳(CO)中毒问题限制了燃料电池的大规模商业化应用。报道了一种用于氢氧化反应的耐CO的燃料电池阳极催化剂,该催化剂由硫化钼(MoS_(2))改性的导电炭黑载体以及沉积在载体上的Pt纳米颗粒组成,命名为Pt/C-MoS_(2)。采取透射电子显微镜(TEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)及电化学测试等方法表征了不同MoS_(2)含量的催化剂的结构、组成以及性能。实验结果表明,硫化钼的添加提高了催化剂的CO抗性,载体中硫化钼含量为10%的样品(Pt/C-MoS_(2)-10)表现出最佳的性能。单电池测试的结果也验证了Pt/CMoS 2-10催化剂CO抗性的提高。

The CO poisoning of the Pt catalyst of the anode of PEMFC limits the popularization of fuel cells and restricts the larger-scale commercial application of PEMFC.Here reports a COtolerance catalyst for PEMFC anode consisting of a MoS_(2)-modified conductive carbon black support and Pt nanoparticles deposited on the support,denoted as:Pt/C-MoS_(2).The structure,composition,and electrochemical properties of catalysts with different MoS_(2) content were evaluated by TEM,XRD XPS and electrochemical tests.The experimental results showed that the addition of MoS_(2) improved the CO tolerance of the catalyst,and the sample with 10%MoS_(2) content in the support(Pt/C-MoS_(2)-10)showed the best performance.The single cell test results also corroborated the improvement of CO tolerance of Pt/C-MoS_(2)-10.