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
Hauptverfasser: Li, Minzhang, Xu, Junyuan, Qi, Fei, Wang, Yu, Yan, Chunliu, Xu, Jiaju
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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.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-023-05480-3