Co<sub>3</sub>O<sub>4</sub> Supported on Graphene-like Carbon by One-Step Calcination of Cobalt Phthalocyanine for Efficient Oxygen Reduction Reaction under Alkaline Medium
Exploiting cost-effective and durable non-platinum electrocatalysts for oxygen reduction reaction (ORR) is of great significance for the development of abundant renewable energy conversion and storage technologies. Herein, a series of Co<sub>3</sub>O<sub>4</sub> supported on...
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MDPI AG
2023-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/7/1241 |
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| author | Huang Tan Xunyu Liu Miaohui Wang Hui Huang Peipei Huang |
| author_facet | Huang Tan Xunyu Liu Miaohui Wang Hui Huang Peipei Huang |
| author_sort | Huang Tan |
| collection | DOAJ |
| description | Exploiting cost-effective and durable non-platinum electrocatalysts for oxygen reduction reaction (ORR) is of great significance for the development of abundant renewable energy conversion and storage technologies. Herein, a series of Co<sub>3</sub>O<sub>4</sub> supported on graphene-like carbon (Co<sub>3</sub>O<sub>4</sub>/C) samples were firstly effectively synthesized by one-step calcination of cobalt phthalocyanine and their electrocatalytic performances were measured for ORR under an alkaline medium. By systematically adjusting the calcination temperature of cobalt phthalocyanine, we found that the material pyrolyzed at 750 °C (Co<sub>3</sub>O<sub>4</sub>/C−750) shows the best ORR electrocatalytic performance (half-wave potentials of 0.77 V (vs. RHE) in 0.1 M KOH) among all the control samples. Moreover, it displays better stability and superior methanol tolerance than commercial 20% Pt/C. The further electrochemical test results reveal that the process is close in characteristics to the four-electron ORR process on Co<sub>3</sub>O<sub>4</sub>/C−750. In addition, Co<sub>3</sub>O<sub>4</sub>/C−750 applied in the zinc–air battery presents 1.34 V of open circuit potential. Based on all the characterizations, the enhanced electrocatalytic performances of Co<sub>3</sub>O<sub>4</sub>/C−750 composite should be ascribed to the synergistic effect between Co<sub>3</sub>O<sub>4</sub> and the graphene-like carbon layer structure produced by pyrolysis of cobalt phthalocyanine, as well as its high specific surface area. |
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| spelling | doaj.art-c2f0699c076f44858704f88be4668cc52023-11-17T17:17:45ZengMDPI AGNanomaterials2079-49912023-03-01137124110.3390/nano13071241Co<sub>3</sub>O<sub>4</sub> Supported on Graphene-like Carbon by One-Step Calcination of Cobalt Phthalocyanine for Efficient Oxygen Reduction Reaction under Alkaline MediumHuang Tan0Xunyu Liu1Miaohui Wang2Hui Huang3Peipei Huang4School of Physics and Information Technology, Shaanxi Normal University, No. 620, West Chang’an Avenue, Chang’an District, Xi’an 710119, ChinaJinduicheng Molybdenum Group Company Limited, Weinan 714102, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, No. 620, West Chang’an Avenue, Chang’an District, Xi’an 710119, ChinaInstitute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren’ai Road, Suzhou 215123, ChinaSchool of Physics and Information Technology, Shaanxi Normal University, No. 620, West Chang’an Avenue, Chang’an District, Xi’an 710119, ChinaExploiting cost-effective and durable non-platinum electrocatalysts for oxygen reduction reaction (ORR) is of great significance for the development of abundant renewable energy conversion and storage technologies. Herein, a series of Co<sub>3</sub>O<sub>4</sub> supported on graphene-like carbon (Co<sub>3</sub>O<sub>4</sub>/C) samples were firstly effectively synthesized by one-step calcination of cobalt phthalocyanine and their electrocatalytic performances were measured for ORR under an alkaline medium. By systematically adjusting the calcination temperature of cobalt phthalocyanine, we found that the material pyrolyzed at 750 °C (Co<sub>3</sub>O<sub>4</sub>/C−750) shows the best ORR electrocatalytic performance (half-wave potentials of 0.77 V (vs. RHE) in 0.1 M KOH) among all the control samples. Moreover, it displays better stability and superior methanol tolerance than commercial 20% Pt/C. The further electrochemical test results reveal that the process is close in characteristics to the four-electron ORR process on Co<sub>3</sub>O<sub>4</sub>/C−750. In addition, Co<sub>3</sub>O<sub>4</sub>/C−750 applied in the zinc–air battery presents 1.34 V of open circuit potential. Based on all the characterizations, the enhanced electrocatalytic performances of Co<sub>3</sub>O<sub>4</sub>/C−750 composite should be ascribed to the synergistic effect between Co<sub>3</sub>O<sub>4</sub> and the graphene-like carbon layer structure produced by pyrolysis of cobalt phthalocyanine, as well as its high specific surface area.https://www.mdpi.com/2079-4991/13/7/1241Co<sub>3</sub>O<sub>4</sub>graphene-like carbonoxygen reduction reactionone-step calcinationcobalt phthalocyanine |
| spellingShingle | Huang Tan Xunyu Liu Miaohui Wang Hui Huang Peipei Huang Co<sub>3</sub>O<sub>4</sub> Supported on Graphene-like Carbon by One-Step Calcination of Cobalt Phthalocyanine for Efficient Oxygen Reduction Reaction under Alkaline Medium Nanomaterials Co<sub>3</sub>O<sub>4</sub> graphene-like carbon oxygen reduction reaction one-step calcination cobalt phthalocyanine |
| title | Co<sub>3</sub>O<sub>4</sub> Supported on Graphene-like Carbon by One-Step Calcination of Cobalt Phthalocyanine for Efficient Oxygen Reduction Reaction under Alkaline Medium |
| title_full | Co<sub>3</sub>O<sub>4</sub> Supported on Graphene-like Carbon by One-Step Calcination of Cobalt Phthalocyanine for Efficient Oxygen Reduction Reaction under Alkaline Medium |
| title_fullStr | Co<sub>3</sub>O<sub>4</sub> Supported on Graphene-like Carbon by One-Step Calcination of Cobalt Phthalocyanine for Efficient Oxygen Reduction Reaction under Alkaline Medium |
| title_full_unstemmed | Co<sub>3</sub>O<sub>4</sub> Supported on Graphene-like Carbon by One-Step Calcination of Cobalt Phthalocyanine for Efficient Oxygen Reduction Reaction under Alkaline Medium |
| title_short | Co<sub>3</sub>O<sub>4</sub> Supported on Graphene-like Carbon by One-Step Calcination of Cobalt Phthalocyanine for Efficient Oxygen Reduction Reaction under Alkaline Medium |
| title_sort | co sub 3 sub o sub 4 sub supported on graphene like carbon by one step calcination of cobalt phthalocyanine for efficient oxygen reduction reaction under alkaline medium |
| topic | Co<sub>3</sub>O<sub>4</sub> graphene-like carbon oxygen reduction reaction one-step calcination cobalt phthalocyanine |
| url | https://www.mdpi.com/2079-4991/13/7/1241 |
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