Thermal Conversion of MOF@MOF: Synthesis of an N-Doped Carbon Material with Excellent ORR Performance.

Thermal Conversion of MOF@MOF: Synthesis of an N-Doped Carbon Material with Excellent ORR Performance.
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MOF@MOF的热转化:合成具有优异ORR性能的氮掺杂碳材料

DOI:
10.1002/cplu.201800392
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发表时间:
2018-10
期刊:
影响因子:
3.4
通讯作者:
Xiang Shengchang
Xiang Shengchang
中科院分区:
化学3区
文献类型:
--
作者:
Zhang Mengxin;Wu Dan;Ye Yingxiang;Wu Ling;Yao Zizhu;Ma Xiuling;Wang Lihua;Zhang Zhangjing;Xiang Shengchang

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在这里,我们提出了一种新的策略,其中使用两种同构金属有机框架(MOF)[FJU-40-H(a)和FJU-40-NH 2(B)]来构建核-壳材料MOF@-MOF。这种基于氮掺杂和比表面的策略导致了在N2气氛中一步热处理的N掺杂多孔碳(NPC)材料;该材料显示出对氧还原反应(ORR)的高催化活性。采用SEM、XPS、拉曼、比表面积、孔径分布和电化学测试等手段对材料进行了分析。发现衍生自核-壳M0F@M0F的NPC可以提供超过单一M0 F的优异的催化ORR性能。NPC-b@a-4h(0.068 V)>NPC-a@B-4h(0.075 V)>NPC-a-4h(0.109 V)>NPC-b-4h(0.113 V)。NPC-a @ B @a(n=4.15)比NPC-a@ B @b(n=3.32)具有更好的氧还原性能,说明核内外配体含氮量的不同影响了氧还原性能。
Here we propose a new strategy in which two isomorphic metal organic frameworks (MOFs) [FJU-40-H (a) and FJU-40-NH2 (b)] are used to construct the core-shell material MOF@-MOF. This strategy based on nitrogen doping and specific surface has resulted in an N-doped porous carbon (NPC) material in a one-step thermal treatment in N2 atmosphere; this material displays high catalytic activity for the oxygen reduction reaction (ORR). The materials were analyzed by SEM, XPS, Raman, specific surface area, pore size distribution and electro chemical measurements. It was found that NPC derived from.the core-shell MOF@MOF can provide excellent catalytic ORR performance exceeding that of the single MOF. The onset potential is NPC-b@a-4h ( 0.068 V)>NPC-a@b-4h ( 0.075 V)>NPC-a-4h ( 0.109 V)>NPC-b-4h ( 0.113 V). Moreover, the results also show that the performance of NPC-b@a (n=4.15) is.better than that of NPC-a@b (n=3.32), which means the different nitrogen content of ligands inside and outside of the core affects the ORR properties.
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