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Cobalt Nanoparticle-Embedded Nitrogen-Doped Carbon Catalyst Derived from a Solid-State Metal-Organic Framework Complex for OER and HER Electrocatalysis

Author

Listed:
  • Shaik Gouse Peera

    (Department of Environmental Science, Keimyung University, 1095 Dalgubeol-daero, Dalseo-gu, Daegu 42601, Korea)

  • Ravindranadh Koutavarapu

    (School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Korea)

  • Chao Liu

    (Engineering Research Center for Hydrogen Energy Materials and Devices, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China)

  • Gaddam Rajeshkhanna

    (Department of Chemistry, National Institute of Technology Warangal, Warangal 506004, Telangana, India)

  • Arunchander Asokan

    (Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel)

  • Ch. Venkata Reddy

    (School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Korea)

Abstract

Electrochemical water splitting is considered a promising way of producing hydrogen and oxygen for various electrochemical energy devices. An efficient single, bi-functional electrocatalyst that can perform hydrogen evolution reactions (HERs) and oxygen evolution reactions (OERs) is highly essential. In this work, Co@NC core-shell nanoparticles were synthesized via a simple, eco-friendly, solid-state synthesis process, using cobalt nitrate and with pyrazole as the N and C source. The morphological analysis of the resulting Co@NC nanoparticles was performed with a scanning and transmission electron microscope, which showed Co nanoparticles as the core and the pyrolysis of pyrazole organic ligand N-doped carbon derived shell structure. The unique Co@NC nanostructures had excellent redox sites for electrocatalysis, wherein the N-doped carbon shell exhibited superior electronic conductivity in the Co@NC catalyst. The resulting Co@NC nanocatalyst showed considerable HER and OER activity in an alkaline medium. The Co@NC catalyst exhibited HERs overpotentials of 243 and 170 mV at 10 mA∙cm −2 on glassy carbon and Ni foam electrodes, respectively, whereas OERs were exhibited overpotentials of 450 and 452 mV at a current density of 10 and 50 mA∙cm −2 on glassy carbon electrode and Ni foam, respectively. Moreover, the Co@NC catalyst also showed admirable durability for OERs in an alkaline medium.

Suggested Citation

  • Shaik Gouse Peera & Ravindranadh Koutavarapu & Chao Liu & Gaddam Rajeshkhanna & Arunchander Asokan & Ch. Venkata Reddy, 2021. "Cobalt Nanoparticle-Embedded Nitrogen-Doped Carbon Catalyst Derived from a Solid-State Metal-Organic Framework Complex for OER and HER Electrocatalysis," Energies, MDPI, vol. 14(5), pages 1-14, March.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:5:p:1320-:d:508036
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    References listed on IDEAS

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    1. Yao Zheng & Yan Jiao & Yihan Zhu & Lu Hua Li & Yu Han & Ying Chen & Aijun Du & Mietek Jaroniec & Shi Zhang Qiao, 2014. "Hydrogen evolution by a metal-free electrocatalyst," Nature Communications, Nature, vol. 5(1), pages 1-8, September.
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    Cited by:

    1. Devi Radhika & Archana Shivakumar & Deepak R. Kasai & Ravindranadh Koutavarapu & Shaik Gouse Peera, 2022. "Microbial Electrolysis Cell as a Diverse Technology: Overview of Prospective Applications, Advancements, and Challenges," Energies, MDPI, vol. 15(7), pages 1-19, April.
    2. Wenxian Liu & Zhengguang Qin & Xiaojing Dai & Shibo Meng & Xinxin Niu & Wenhui Shi & Fangfang Wu & Xiehong Cao, 2023. "Coupling of NiFe Layered Double Hydroxides with Sulfides for Highly Efficient Urea Electrolysis and Hydrogen Evolution," Energies, MDPI, vol. 16(3), pages 1-10, January.

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