Atomic cobalt catalysts for the oxygen evolution reaction.
Qiaoqiao ZhangZhiyao DuanMin LiJingqi GuanPublished in: Chemical communications (Cambridge, England) (2019)
Development of high-efficiency single-atom catalysts (SACs) for the oxygen evolution reaction (OER) is challenging. Herein, we report a facile annealing strategy to construct an atomically dispersed cobalt- and nitrogen-codoped graphene catalyst for high-efficiency OER. The as-prepared 0.7-Co@NG-750 electrocatalyst requires an ultra-low onset overpotential of approximately 210 mV on a glassy carbon electrode in both 1.0 M KOH and 0.1 M KOH solutions. The density functional theory (DFT) calculations reveal that the theoretical overpotential on Co-N4 and Co-N2C2 sites is 0.41 and 0.53 V, respectively, and these might be efficient active sites for electrocatalytic water oxidation.
Keyphrases
- high efficiency
- density functional theory
- metal organic framework
- molecular dynamics
- electron transfer
- reduced graphene oxide
- highly efficient
- carbon nanotubes
- walled carbon nanotubes
- hydrogen peroxide
- genome wide
- high resolution
- single cell
- room temperature
- dna methylation
- gene expression
- nitric oxide
- solid state
- amino acid