CeO2 Encapsulated by Iron, Sulfur, and Nitrogen‐Doped Carbons for Enhanced Oxygen Reduction Reaction Catalytic Activity,ChemElectroChem

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CeO2 Encapsulated by Iron, Sulfur, and Nitrogen‐Doped Carbons for Enhanced Oxygen Reduction Reaction Catalytic Activity
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-01-14 , DOI: 10.1002/celc.201901796
Mingjun Ji ₁ , Bing He ₂ , Yue Yu ₁ , Xiaodan Yu ₁ , Shuangxi Xing ₁

Affiliation

The design and synthesis of highly stable, low‐cost electrocatalysts for the oxygen reduction reaction to supersede noble‐metal catalysts is critical for their application in the field of fuel cells. Herein, we report a facile approach for the synthesis of CeO₂ encapsulated by iron, sulfur, and nitrogen‐doped carbon nanoparticles (CeO₂@Fe,S,N−C NPs) by pyrolyzing CeO₂@polypyrrole, which is obtained in the presence of sodium dodecylbenzene sulfonate as a surfactant and FeCl₃ as an oxidant during the polymerization of pyrrole on the CeO₂ surface. As Fe and S are effectively doped into the N‐doped carbon derived from polypyrrole, a large number of active sites are created, which greatly enhances the catalytic activity of the sample. The achieved sample displays excellent catalytic activity with an onset and halfwave potential of 0.924 V and 0.835 V, respectively, and a limiting current density of 5.45 mA cm⁻² at the potential of 0.4 V vs. RHE. Moreover, it illustrates a high durability and strong methanol tolerance, endowing it with the prospect of applications in energy conversion.

中文翻译：

铁，硫和氮掺杂的碳包裹的CeO2增强了氧还原反应的催化活性

用于氧还原反应以取代贵金属催化剂的高度稳定，低成本的电催化剂的设计和合成对其在燃料电池领域的应用至关重要。在此，我们报告的CeO的合成的简便方法₂由铁，硫和氮掺杂的碳纳米粒子（胶囊化的CeO ₂通过热解的CeO @的Fe，S，N-C NPS）₂ @polypyrrole，其在所获得的吡咯在CeO ₂上聚合过程中十二烷基苯磺酸钠作为表面活性剂和FeCl ₃作为氧化剂的存在表面。由于Fe和S被有效地掺入了聚吡咯衍生的N掺杂碳中，因此形成了大量的活性位点，大大增强了样品的催化活性。所获得的样品显示出优异的催化活性，在0.4V相对于RHE的电位下，其起始和半波电势分别为0.924V和0.835V，极限电流密度为5.45mA cm ^-2。此外，它显示出高耐久性和强甲醇耐受性，使其在能量转换中具有应用前景。

更新日期：2020-01-14

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