Immobilization of cobalt oxide nanoparticles on porous nitrogen-doped carbon as electrocatalyst for oxygen evolution

doi:10.1016/j.cjche.2021.12.021

中国化学工程学报 ›› 2022, Vol. 52 ›› Issue (12): 10-18.DOI: 10.1016/j.cjche.2021.12.021

• Full Length Article • 上一篇下一篇

Immobilization of cobalt oxide nanoparticles on porous nitrogen-doped carbon as electrocatalyst for oxygen evolution

Shusheng Li¹, Rui Kuang², Xiangzheng Kong¹, Xiaoli Zhu¹, Xubao Jiang¹

1. College of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China;
2. College of Traffic Civil Engineering, Shandong Jiaotong University, Jinan 250357, China

收稿日期:2021-06-30 修回日期:2021-11-19 出版日期:2022-12-28 发布日期:2023-01-31
通讯作者: Rui Kuang,E-mail:kuangr1985@foxmail.com;Xiaoli Zhu,E-mail:chm_zhuxl@ujn.edu.cn
基金资助:
This work was financially supported by the Natural Science Foundation of Shandong Province, China (grant numbers ZR2021MB112, ZR2019MB031, ZR2020QB065); Natural Science Foundation of Guangdong Province, China (grant number 2020A1515110374); and by Science and Technology Bureau of Jinan City, Shandong Province, China (2021GXRC105).

Immobilization of cobalt oxide nanoparticles on porous nitrogen-doped carbon as electrocatalyst for oxygen evolution

Shusheng Li¹, Rui Kuang², Xiangzheng Kong¹, Xiaoli Zhu¹, Xubao Jiang¹

1. College of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China;
2. College of Traffic Civil Engineering, Shandong Jiaotong University, Jinan 250357, China

Received:2021-06-30 Revised:2021-11-19 Online:2022-12-28 Published:2023-01-31
Contact: Rui Kuang,E-mail:kuangr1985@foxmail.com;Xiaoli Zhu,E-mail:chm_zhuxl@ujn.edu.cn
Supported by:
This work was financially supported by the Natural Science Foundation of Shandong Province, China (grant numbers ZR2021MB112, ZR2019MB031, ZR2020QB065); Natural Science Foundation of Guangdong Province, China (grant number 2020A1515110374); and by Science and Technology Bureau of Jinan City, Shandong Province, China (2021GXRC105).

摘要/Abstract

摘要： Highly efficient and robust electrocatalysts have been in urgent demand for oxygen evolution reaction (OER). For this purpose, high-cost carbon materials, such as graphene and carbon nanotubes, have been used as supports to metal oxides to enhance their catalytic activity. We report here a new Co₃O₄-based catalyst with nitrogen-doped porous carbon material as the support, prepared by pyrolysis of porous polyurea (PU) with Co(NO₃)₂ immobilized on its surface. To this end, PU was first synthesized, without any additive, through a very simple one-step precipitation polymerization of toluene diisocyanate in a binary mixture of H₂O-acetone at room temperature. By immersing PU in an aqueous solution of Co(NO₃)₂ at room temperature, a cobalt coordinated polymer composite, Co(NO₃)₂/PU, was obtained, which was heated at 500 ℃ in air for 2 h to get a hybrid, Co₃O₄/NC, consisting of Co₃O₄ nanocrystals and sp²-hybridized N-doped carbon. Using this Co₃O₄/NC as a catalyst in OER, a current density of 10 mA·cm^-2 was readily achieved with a low overpotential of 293 mV with a Tafel slope of 87 mV·dec^-1, a high catalytic activity. This high performance was well retained after 1000 recycled uses, demonstrating its good durability. This work provides therefore a facile yet simple pathway to fabrication of a new transition metal oxides-based N-doped carbon catalyst for OER with high performance.

关键词: Porous polyurea, N-doped carbon-Co₃O₄ hybrid, Oxygen evolution, Catalyst, Electrolysis, Electrochemistry

Abstract: Highly efficient and robust electrocatalysts have been in urgent demand for oxygen evolution reaction (OER). For this purpose, high-cost carbon materials, such as graphene and carbon nanotubes, have been used as supports to metal oxides to enhance their catalytic activity. We report here a new Co₃O₄-based catalyst with nitrogen-doped porous carbon material as the support, prepared by pyrolysis of porous polyurea (PU) with Co(NO₃)₂ immobilized on its surface. To this end, PU was first synthesized, without any additive, through a very simple one-step precipitation polymerization of toluene diisocyanate in a binary mixture of H₂O-acetone at room temperature. By immersing PU in an aqueous solution of Co(NO₃)₂ at room temperature, a cobalt coordinated polymer composite, Co(NO₃)₂/PU, was obtained, which was heated at 500 ℃ in air for 2 h to get a hybrid, Co₃O₄/NC, consisting of Co₃O₄ nanocrystals and sp²-hybridized N-doped carbon. Using this Co₃O₄/NC as a catalyst in OER, a current density of 10 mA·cm^-2 was readily achieved with a low overpotential of 293 mV with a Tafel slope of 87 mV·dec^-1, a high catalytic activity. This high performance was well retained after 1000 recycled uses, demonstrating its good durability. This work provides therefore a facile yet simple pathway to fabrication of a new transition metal oxides-based N-doped carbon catalyst for OER with high performance.

Key words: Porous polyurea, N-doped carbon-Co₃O₄ hybrid, Oxygen evolution, Catalyst, Electrolysis, Electrochemistry

Shusheng Li, Rui Kuang, Xiangzheng Kong, Xiaoli Zhu, Xubao Jiang. Immobilization of cobalt oxide nanoparticles on porous nitrogen-doped carbon as electrocatalyst for oxygen evolution[J]. 中国化学工程学报, 2022, 52(12): 10-18.

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Immobilization of cobalt oxide nanoparticles on porous nitrogen-doped carbon as electrocatalyst for oxygen evolution

Immobilization of cobalt oxide nanoparticles on porous nitrogen-doped carbon as electrocatalyst for oxygen evolution

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