期刊
JOURNAL OF ENERGY CHEMISTRY
卷 27, 期 4, 页码 1261-1267出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jechem.2018.04.015
关键词
Zeolitic imidazolate frameworks (ZIFs); Polydopamine (PDA); Carbon hollow nanoparticles; Oxygen evolution reaction (OER); Oxygen reduction reaction (ORR)
资金
- NSFC [21503217]
The pyrolysis under inert atmosphere has been widely used for the synthesis of metal containing heteroatoms doped carbon materials, versatile catalysts for various reactions. However, it is difficult to prevent metal nanoparticles aggregation during pyrolysis process. Herein, we reported the efficient synthesis of nitrogen doped carbon hollow nanospheres with cobalt nanoparticles (Co NP, ca. 10 nm in size) distributed uniformly in the shell via pyrolysis of yolk-shell structured Zn-Co-ZIFs@polydopamine (PDA). PDA acted as both protection layer and carbon source, which successfully prevented the aggregation of cobalt nanoparticles during high-temperature pyrolysis process. The Co NP and N containing carbon (Co NP/NC) hollow nanospheres were active for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), affording overpotential of 430 mV at 10 mA/cm(2) for OER in 1 M KOH and comparable half-wave potential to that of Pt/C (0.80 V vs RHE) for ORR in 0.1 M KOH. The superior performance of carbon hollow nanospheres for both OER and ORR was mainly attributed to its small metal nanoparticles, N-doping and hollow nanostructure. The protection and confinement effect that originated from PDA coating strategy could be extended to the synthesis of other hollow structured carbon materials, especially the ones with small metal nanoparticles. (C) 2018 Published by Elsevier B.V. and Science Press.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据