Jump to main content
Jump to site search


A sulfonated cobalt phthalocyanine/carbon nanotube hybrid as a bifunctional oxygen electrocatalyst

Author affiliations

Abstract

The development of effective bifunctional catalysts for both oxygen reduction reactions (ORRs) and oxygen evolution reactions (OERs) is crucial for improving the performance of charge and discharge processes in rechargeable metal–air batteries. Here, we report a sulfonated cobalt phthalocyanine/carbon nanotube hybrid (CoPc-SO3H/CNT) prepared by a facile anchoring method along with sonication and magnetic stirring. The resulting CoPc-SO3H/CNT hybrid exhibits better catalytic activity for ORRs and OERs than the cobalt phthalocyanine/carbon nanotube hybrid (CoPc/CNT), sulfonated cobalt phthalocyanine (CoPc-SO3H), cobalt phthalocyanine (CoPc) and the carbon nanotube (CNT). The onset potential of CoPc-SO3H/CNT for the ORR in 0.1 M KOH is 0.88 V (vs. RHE), which is higher than that of CoPc/CNT (0.85 V), the CNT (0.80 V), CoPc-SO3H (0.77 V) and CoPc (0.66 V). Meanwhile, the CoPc-SO3H/CNT hybrid shows a much lower OER potential (1.62 V) at a current density of 10 mA cm−2 compared to CoPc-SO3H (1.64 V), CoPc/CNT (1.74 V), the CNT (1.96 V) and CoPc (>2.00 V) in 1 M KOH. Similar patterns are also found in 0.1 M KOH solution. Both the conductive CNT and the electron-withdrawing sulfonic groups are confirmed to benefit the electrochemical oxygen reactions (ORRs/OERs).

Graphical abstract: A sulfonated cobalt phthalocyanine/carbon nanotube hybrid as a bifunctional oxygen electrocatalyst

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Aug 2019, accepted on 26 Oct 2019 and first published on 28 Oct 2019


Article type: Paper
DOI: 10.1039/C9DT03360B
Dalton Trans., 2019, Advance Article

  •   Request permissions

    A sulfonated cobalt phthalocyanine/carbon nanotube hybrid as a bifunctional oxygen electrocatalyst

    C. Li, T. Huang, Z. Huang, J. Sun, C. Zong, J. Yang, W. Deng and F. Dai, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C9DT03360B

Search articles by author

Spotlight

Advertisements