Iron oxide@graphitic carbon core-shell nanoparticles embedded in ordered mesoporous N-doped carbon matrix as an efficient cathode catalyst for PEMFC
Iron oxide@graphitic carbon core-shell nanoparticles embedded in ordered mesoporous N-doped carbon matrix as an efficient cathode catalyst for PEMFC
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嵌入有序介孔氮掺杂碳基质中的氧化铁@石墨碳核壳纳米颗粒作为质子交换膜燃料电池的高效阴极催化剂
DOI：
10.1016/j.apcatb.2019.118468
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发表时间：
2020-05
期刊：
影响因子：
--
通讯作者：
Yi Wang
中科院分区：
文献类型：
--
作者：
Kun Wang;Haixin Chen;Xiaofeng Zhang;Yexiang Tong;Shuqin Song;Panagiotis Tsiakaras;Yi Wang
开发具有高活性和长期稳定性的酸性介质中氧还原反应（ORR）电催化剂仍然是一个重要的课题。本文报道了一种新型的FeOx@石墨碳核壳结构纳米粒子，该纳米粒子具有有序的介孔结构（FeOx@GC-NOMC），其i）在酸性介质中表现出更好的电催化活性，ii）遵循四电子ORR过程，和iii）当与商业Pt/C（20重量%）相比时，显示出对甲醇的上级稳定性和惰性。这些特点主要归因于以下两点：i）有序的介孔碳基质不仅有利于快速转移和活性中心暴露，而且限制了嵌入的纳米颗粒的尺寸并避免其团聚，和ii）高含量的“Fe-N”活性中心，而包埋纳米粒子（FeOx@GC）的核壳结构可以保护活性位点免受恶劣条件的腐蚀，并保证其长期的耐久性。制备的FeOx@GC-NOMC在所有测试和目前报道的NPMC中显示出最好的H2-O2 PEMFC单电池性能之一，以及长期耐久性。更准确地说，在开路电位为约.1 V时，峰值功率密度高达350 W g-1（基于有效面积为1050 mW cm-2）。在120小时的计时电流试验后观察到轻微的电流衰减。上述特征使得FeOx@GC-NOMC成为实际燃料电池应用中用于ORR电催化的Pt/C的有前景的潜在替代物。
Developing electrocatalysts with high activity and long-term stability towards oxygen reduction reaction (ORR) in acidic media is still an important topic. However, most of the already reported non-precious-metal catalysts (NPMCs) for ORR exhibit excellent performance in basic media.In the present work, we report a newly designed FeOx@graphitic carbon core-shell structured nanoparticles implanted in N-doped carbon matrix, with ordered and mesoporous structure (FeOx@GC-NOMC), which i) exhibits a better electrocatalytic activity in acidic media, ii) follows a four-electron ORR process, and iii) shows superior stability and inertness to methanol when compared with commercial Pt/C (20 wt %). These features are mostly attributed to the following two points: i) the ordered mesoporous carbon matrix can not only be favorable for the rapid transfer and active sites exposure, but also limit the embedded nanoparticles size and avoid its agglomeration, and ii) the high content of “Fe-N” active sites, and the core-shell structure of embedded nanoparticles (FeOx@GC) can protect the active sites from the corrosion of harsh conditions and ensure the long-term durability.It is found that the as-prepared FeOx@GC-NOMC shows one of the best H2-O2PEMFC single-cell performances, among all thetested and currently reported NPMCs, as well as a long-term durability. More precisely, at an open circuit potential ofca.1 V, the peak power density reaches up to 350 W g−1(1050 mW cm-2based on active area). A slight current decay is observed after a chronoamperometric test of 120 h. The above features make FeOx@GC-NOMC a promising potential alternative to Pt/C for ORR electrocatalysis in practical fuel cell applications.
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影响因子：
13.3
作者：
Z. Yang;Ling Lin;A. Xu
通讯作者：
Z. Yang;Ling Lin;A. Xu
影响因子：
22.1
作者：
Komba, Nathanael;Wei, Qiliang;Sun, Shuhui
通讯作者：
Sun, Shuhui
通过光化学策略将超细Pt电催化剂锚定在TiO2-C上以提高氧还原反应的稳定性和效率
DOI：
10.1016/j.apcatb.2018.05.085
发表时间：
2018-12
期刊：
Applied Catalysis B: Environmental
影响因子：
--
作者：
Wang Jingyu;Xu Min;Zhao Jianquan;Fang Huaifang;Huang Qingzhu;Xiao Weiping;Li Tao;Wang Deli
通讯作者：
Wang Deli
影响因子：
12.9
作者：
Mi-Ju Kim;Ji Eun Park;Sungjun Kim;M. S. Lim;Aihua Jin;Ok-Hee Kim;Min Jeong Kim;Kug‐Seung Lee-
通讯作者：
Mi-Ju Kim;Ji Eun Park;Sungjun Kim;M. S. Lim;Aihua Jin;Ok-Hee Kim;Min Jeong Kim;Kug‐Seung Lee-
MOF 衍生的 3D Fe-N-S 共掺杂碳基体/纳米管纳米复合材料在酸性和碱性介质中具有先进的氧还原活性和稳定性
影响因子：
22.1
作者：
Jin, Huihui;Zhou, Huang;Mu, Shichun
通讯作者：
Mu, Shichun