Facile preparation of tetrafluoro-substituted cobalt phthalocyanine nanorods attached on carbon nanotubes for efficient electrocatalytic CO2 reduction
A tetrafluoro substituted CoPc (CoF 4 Pc), which is well dispersed in N,N-dimethylformamide (DMF), was used to modify carbon nanotubes (CNTs) via a facile sonication method, resulting in CoF 4 Pc nanorods with the length lower than 30 nm on the CNT surface. The as-fabricated CoF 4 Pc-CNT composites...
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Veröffentlicht in: | Journal of solid state electrochemistry 2023-05, Vol.27 (5), p.1269-1278 |
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Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A tetrafluoro substituted CoPc (CoF
4
Pc), which is well dispersed in N,N-dimethylformamide (DMF), was used to modify carbon nanotubes (CNTs) via a facile sonication method, resulting in CoF
4
Pc nanorods with the length lower than 30 nm on the CNT surface. The as-fabricated CoF
4
Pc-CNT composites showed superior CO
2
RR catalytic activity compared with that of individual CoF
4
Pc, due to enhanced mass transfer and electrical conductivity arising from the CNT substrate. The CoF
4
Pc-CNT composite with the CoF
4
Pc/CNT weight ratio of 2:30 exhibited the highest CO current density of 29.0 mA cm
−2
and CO selectivity of 91.8% at − 0.85 V vs. reversible hydrogen electrode (RHE) in a flow cell setup containing 0.5 M KHCO
3
, which was ascribed to enhanced charge transfer induced by highly dispersion of CoF
4
Pc nanorods, and good conductivity of CNT substrates. The work provides new insights for developing low-cost, effective, phthalocyanine-based catalysts for electrochemical CO
2
RR. |
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ISSN: | 1432-8488 1433-0768 |
DOI: | 10.1007/s10008-023-05480-3 |