Abstract
Novel Co atoms immobilized carbon nanotubes (CoSAs@CNTs) are synthesized by structural engineering of the zeolitic imidazolate framework (ZIF-67) upon treatment with dicyandiamide (DCD). A unique morphology and promising electrochemical performance are shown by the Co atoms immobilized CNTs. The electrocatalyst remarkably exhibits a highly positive onset potential of 0.99 V and half-wave potential of 0.86 V, both even more positive than the commercial Pt/C catalyst, and the current density is also greater than that of the Pt/C catalyst in alkaline media. A decent performance is observed in acidic media also. The electrocatalyst is extraordinarily stable to harsh environments. A promising performance for the oxygen evolution reaction (OER) is demonstrated by the electrocatalyst, while for bifunctional electrocatalysis a small overvoltage of 0.78 V is observed with onset potential at the lower overpotential of 300 mV announcing the advantage of its usage for practical energy conversion and storage systems. This novel study may provide a new road map for fuel cell technology.
Original language | English |
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Pages (from-to) | 3283-3291 |
Number of pages | 9 |
Journal | ACS Applied Energy Materials |
Volume | 1 |
Issue number | 7 |
DOIs | |
State | Published - 23 Jul 2018 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018 American Chemical Society.
Keywords
- bifunctional catalysis
- carbon nanotubes
- oxygen evolution reactions
- oxygen reduction
- single atoms
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Energy Engineering and Power Technology
- Electrochemistry
- Materials Chemistry
- Electrical and Electronic Engineering