Journal
NANO ENERGY
Volume 52, Issue -, Pages 307-314Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2018.08.003
Keywords
Electrocatalysts; Oxygen reduction; Graphene; Graphene-like nanocarbon; Zn-air batteries
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Funding
- National Natural Science Foundation of China [51602113, 51702111]
- China Postdoctoral Science Foundation [2016M590692]
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Defect and N-activated electronic engineering are of paramount importance for developing highly active carbon-based electrocatalysts toward oxygen reduction reaction (ORR) because the binding affinity of the carbon matrix can be efficiently tuned and thus promote the electrocatalytic activity. Herein, we present a facile and general strategy for fabricating pyridinic-N dominated and defect-enriched graphene-like nanocarbon material (ND-GLC) involving in-situ alkaline activation of cellulose and ammonia injection. The ND-GLC material has a superior and enhanced ORR activity and stability compared to commercial Pt/C catalyst in both rotating disk electrode measurements and Zn-air battery applications. Experimental and theoretical studies describe that the high electrocatalytic activity of ND-GLC mainly originates from the synergetic effect of edges/defects and pyridinic-N dopants. Importantly, our concept is demonstrated to be universal for other carbon-based nanomaterials (i.e., graphite nanoplates, carbon nanotubes, carbon nanospheres, graphene nanosheets).
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