Enhanced SO2 and CO poisoning resistance of CeO2 modified Pt/C catalysts applied in PEM fuel cells

Enhanced SO2 and CO poisoning resistance of CeO2 modified Pt/C catalysts applied in PEM fuel cells
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CeO2改性Pt/C催化剂在质子交换膜燃料电池中的增强抗SO2和CO中毒能力

DOI:
10.1016/j.electacta.2013.08.141
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发表时间:
2013-12
影响因子:
6.6
通讯作者:
Shichun Mu
Shichun Mu
中科院分区:
材料科学2区
文献类型:
--
作者:
Feng Xu;Ran Xu;Shichun Mu

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so2和CO是质子交换膜(PEM)燃料电池中铂基催化剂的有害物质。我们引入低含量(2、4和6 wt%)无定形氧化铈(CeO2)来修饰Pt催化剂,以提高so2和CO的耐受性。通过XRD、TEM和XPS分析研究了催化剂的结构和形貌。电化学结果表明,Pt/C催化剂中CeO2含量为2 wt%时,其抗so2中毒性能最佳,而随着CeO2含量的增加,其抗CO中毒能力增强。讨论了Pt-CeO2 /C催化剂对抗so2和CO中毒的促进作用。
SO2and CO are detrimental agents to Pt based catalysts applied in proton exchange membrane (PEM) fuel cells. We introduce low-content (2, 4, and 6 wt%) amorphous cerium oxide (CeO2) to modify Pt catalysts for enhancing the SO2and CO tolerance. The structure and morphology of the catalysts are studied by XRD, TEM and XPS analyses. Electrochemical results show that 2 wt% of CeO2in the Pt/C catalyst exhibits the best SO2poisoning resistance, while CO tolerance is enhanced as increasing content of CeO2. The promotional effect of Pt–CeO2/C catalysts on SO2and CO poisoning resistance is also discussed.
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