Bimetallic ZIF derived Co nanoparticle anchored N-doped porous carbons for an efficient oxygen reduction reaction,Inorganic Chemistry Frontiers

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Bimetallic ZIF derived Co nanoparticle anchored N-doped porous carbons for an efficient oxygen reduction reaction
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2020/01/02 , DOI: 10.1039/c9qi01487j
Kaili Li _{1,

2,

3,

4} , Daohao Li _{1,

2,

3,

4} , Liangkui Zhu _{1,

2,

3,

4} , Zhuangzhuang Gao _{1,

2,

3,

4} , Qianrong Fang _{1,

2,

3,

4} , Ming Xue _{1,

2,

3,

4} , Shilun Qiu _{1,

2,

3,

4} , Xiangdong Yao _{1,

2,

3,

4,

5}

Affiliation

Five isostructural, new bimetallic ZIF precursors with various Zn/Co ratios were successfully synthesized to derive a series of N-doped porous carbons embedded with Co nanoparticles. We systematically investigated the effect of different bimetal ratios in ZIF precursors on the electrocatalytic properties of the obtained porous carbon catalysts. The optimised material Zn₂Co₁-NPs@NC sample demonstrated excellent oxygen reduction reaction performance with a half-wave potential (E_1/2) of 0.849 V, superior to that of commercial Pt/C, and the electron transfer number was 3.98 at 0.2 V to 0.5 V, exhibiting a nearly four-electron selectivity. Furthermore, by exploring the current–time chronoamperometric response over 40 000 s, it is shown that the long-term stability of Zn₂Co₁-NPs@NC was much better than that of the commercial Pt/C.

中文翻译：

ZIF衍生的双金属Co纳米颗粒锚固的N掺杂多孔碳，用于有效的氧还原反应

成功地合成了五种具有不同Zn / Co比的同构新双金属ZIF前驱物，以衍生出一系列嵌入Co纳米粒子的N掺杂多孔碳。我们系统地研究了ZIF前体中不同双金属比对获得的多孔碳催化剂的电催化性能的影响。优化的材料Zn ₂ Co ₁ -NPs @ NC样品具有出色的氧还原反应性能，具有半波电位（E _1/2）为0.849 V，优于商用Pt / C，并且在0.2 V至0.5 V下的电子转移数为3.98，表现出近四电子选择性。此外，通过探索超过40 000 s的电流-时间计时电流响应，表明Zn ₂ Co ₁ -NPs @ NC的长期稳定性远优于商业Pt / C。

更新日期：2020-02-18

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