Heterostructural Interface in Fe3C-TiN Quantum Dots Boosts Oxygen Reduction Reaction for Al-Air Batteries.
Kaiqi LiChuqing WangHuanxin LiYongliang WenFei WangQingyue XueZhongyuan HuangChaopeng FuPublished in: ACS applied materials & interfaces (2021)
Oxygen reduction electrocatalysts play important roles in metal-air batteries. Herein, Fe3C-TiN heterostructural quantum dots loaded on carbon nanotubes (FCTN@CNTs) are prepared as electrocatalysts for the oxygen reduction reaction (ORR) through a one-pot pyrolysis. The Fe3C-TiN quantum dots with a diameter of 2-5 nm show the unique characteristic of heterostructural interface. The as-prepared FCTN@CNTs display Pt/C comparable ORR performance (Eonset 1.06 and E1/2 0.95 V) in alkaline medium, which is ascribed to the heterostructural interface between TiN and Fe3C. Furthermore, the Al-air batteries with the FCTN@CNT catalyst display superior discharge performance, demonstrating good feasibility for practical application. This work provides an effective new method to synthesize affordable and efficient oxygen reduction reaction catalysts.
Keyphrases
- quantum dots
- metal organic framework
- carbon nanotubes
- sensitive detection
- oxide nanoparticles
- perovskite solar cells
- visible light
- solid state
- aqueous solution
- energy transfer
- photodynamic therapy
- risk assessment
- electron transfer
- cancer therapy
- optical coherence tomography
- reduced graphene oxide
- carbon dioxide
- transition metal