Covalent-Bridged Heterointerfaces via Grafted Triazine Organic Polymers Enable Directed Charge Transfer for Efficient Oxygen Reduction in Zn-Air Batteries
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F25%3A10258837" target="_blank" >RIV/61989100:27640/25:10258837 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acsnano.5c11348" target="_blank" >https://pubs.acs.org/doi/10.1021/acsnano.5c11348</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsnano.5c11348" target="_blank" >10.1021/acsnano.5c11348</a>
Alternative languages
Result language
angličtina
Original language name
Covalent-Bridged Heterointerfaces via Grafted Triazine Organic Polymers Enable Directed Charge Transfer for Efficient Oxygen Reduction in Zn-Air Batteries
Original language description
Covalent triazine framework (CTF) derivatives have emerged as promising metal-free electrocatalysts due to their high nitrogen content and intrinsic porosity. However, their performance remains limited by sluggish interfacial charge transport and the inaccessibility of active sites. Herein, we report an interfacial covalent bridging strategy based on grafting polymerization to construct a carbon heterostructure electrocatalyst, featuring vertically aligned nitrogen-doped nanosheets covalently anchored onto graphene (v-N/CNS/Gr) support. The covalently bridged interface promotes interfacial charge transfer across the heterostructure, activating otherwise dormant nitrogen active sites and amplifying the oxygen reduction reaction (ORR) reactivity. In situ spectroscopic analyses and theoretical simulations reveal that the covalent bridged bonding promotes charge transport and oxygen activation, and optimizes the adsorption/desorption of intermediates, collectively contributing to reduced energy barriers along the 4e- ORR pathway. As a result, the v-N/CNS/Gr delivers excellent ORR activity with a half-wave potential of 0.85 V (vs RHE). When employed as the cathode in a Zn-air battery, v-N/CNS/Gr achieves a high-power density and stable operation over 850 h. This work demonstrates a generalizable triazine-polymer-based interfacial bridge strategy for enhancing active site accessibility and charge transport in metal-free electrocatalysts.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20500 - Materials engineering
Result continuities
Project
—
Continuities
O - Projekt operacniho programu
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Nano
ISSN
1936-0851
e-ISSN
1936-086X
Volume of the periodical
19
Issue of the periodical within the volume
35
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
31870-31881
UT code for WoS article
001555940200001
EID of the result in the Scopus database
2-s2.0-105015363723