Successfully synthesis of FeSe2/CoFe2O4 heterojunction with high performance for hydrogen evolution reaction

Huixuan Zhang, Li-chao Nengzi, Bo Li, Qingfeng Cheng, Jianfeng Gou and Xiuwen Cheng

Renewable Energy, 2020, vol. 155, issue C, 717-724

Abstract: Water splitting related to renewable energy is considered to be one of the most important strategy for hydrogen production. In this article, highly active, durable, inexpensive and magnetic FeSe2/CoFe2O4 heterojunction was fabricated via a facile two-step hydrothermal method. Subsequently, the composite was characterized by a series of physicochemical technologies, including X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microcopy (TEM), X-ray photoelectron spectra (XPS) and vibrating sample magnetometer (VSM) measurements. In order to evaluate the HER performance of the FeSe2/CoFe2O4 heterojunction, electrochemical measurements were also performed. Due to the unique band structure of FeSe2 nanorods and CoFe2O4 nanoparticles and significant coupling effect between them, the FeSe2/CoFe2O4 heterojunction exhibited excellent HER activity with a small overpotential of 231 mV at a current density of 10 mA cm−2. Besides, it had a smaller Tafel slope of 88.76 mV·dec−1 in acid media compared to single FeSe2 nanorods. At the same time, the heterojunction showed excellent mechanical stability with 9 h.

Keywords: FeSe2/CoFe2O4 heterojunction; Electrocatalyst; Hydrothermal method; Hydrogen evolution reaction (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:155:y:2020:i:c:p:717-724

DOI: 10.1016/j.renene.2020.03.171

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