Cobalt-Nitrogen-Doped Helical Carbonaceous Nanotubes as a Class of Efficient Electrocatalysts for the Oxygen Reduction Reaction.
Zuozhong LiangXing FanHaitao LeiJing QiYouyong LiJinpeng GaoMeiling HuoHaitao YuanWei ZhangHaiping LinHaoquan ZhengRui CaoPublished in: Angewandte Chemie (International ed. in English) (2018)
The oxygen reduction reaction (ORR) is of significant importance in the development of fuel cells. Now, cobalt-nitrogen-doped chiral carbonaceous nanotubes (l/d-CCNTs-Co) are presented as efficient electrocatalysts for ORR. The chiral template, N-stearyl-l/d-glutamic acid, induces the self-assembly of well-arranged polypyrrole and the formation of ordered graphene carbon with helical structures at the molecular level after the pyrolysis process. Co was subsequently introduced through the post-synthesis method. The obtained l/d-CCNTs-Co exhibits superior ORR performance, including long-term stability and better methanol tolerance compared to achiral Co-doped carbon materials and commercial Pt/C. DFT calculations demonstrate that the charges on the twisted surface of l/d-CCNTs are widely separated; as a result the Co atoms are more exposed on the chiral CCNTs. This work gives us a new understanding of the effects of helical structures in electrocatalysis.
Keyphrases
- capillary electrophoresis
- reduced graphene oxide
- density functional theory
- ionic liquid
- induced apoptosis
- carbon nanotubes
- metal organic framework
- high resolution
- cell cycle arrest
- molecularly imprinted
- quantum dots
- mass spectrometry
- molecular dynamics
- signaling pathway
- cell death
- gold nanoparticles
- endoplasmic reticulum stress
- single molecule
- crystal structure
- pi k akt
- tandem mass spectrometry