Synergistic Strong-Weak Adsorption Coupling in the FeN 6 –CoN 4 Dual-Site Modulates Oxygen Reduction Pathways via Oxygen Adsorbate Evolution-to-Dissociation Transition
Pingdingshan University · Fudan University · +8 more institutions
Abstract
Atomically dispersed non-noble metal–nitrogen-carbon electrocatalysts could derive a four-electron oxygen reduction reaction (ORR) described via a typical adsorbate evolution mechanism (AEM), but their kinetics are limited by the linear scaling relationship (LSR) between the *OOH and *OH. Herein, we reported heteronuclear dual-site FeN6–CoN4 materials obtained via integrating Fe3+ and Co2+ into pyrrole-functionalized g-C3N4 nanosheets. Such electrocatalysts broke the conventional LSR through a shifted oxygen dissociation mechanism (ODM: *O2 → *O + *OH → 2 *OH). Density functional theory calculations confirmed the strongest and weakest adsorption strengths of key ORR intermediates in the CoN4 and FeN6 sites…
Citation impact
- FWCI
- 18.61
- Percentile
- 100%
- References
- 85
Authors
16- MJMin Jie WangCorresponding
Pingdingshan University, Fudan University, Advanced Coatings (Belgium)
- RJRumeng Ji
Pingdingshan University
- CHChao Huang
Zhongyuan University of Technology, Advanced Energy Materials (United States)
- XHXiaodan Huang
The University of Queensland, Institute of Bioengineering and Nanotechnology
- LWLi Wang
Pingdingshan University
Topics & keywords
- Density functional theory
- Heteronuclear molecule
- Catalysis
- Dissociation (chemistry)
- Oxygen
- Adsorption
- Electrocatalyst
- Transition metal